Document:

Exhibit 10.10

 

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED OR QUALIFIED UNDER THE U.S. SECURITIES ACT
OF 1933 OR THE SECURITIES LAWS OF ANY STATE OR FOREIGN JURISDICTION, AND MAY BE OFFERED AND SOLD ONLY IF REGISTERED AND QUALIFIED
PURSUANT TO THE RELEVANT PROVISIONS OF U.S. FEDERAL AND STATE AND APPLICABLE FOREIGN SECURITIES LAWS OR IF THE CORPORATION IS
PROVIDED AN OPINION OF COUNSEL SATISFACTORY TO THE CORPORATION THAT REGISTRATION AND QUALIFICATION UNDER U.S. FEDERAL AND STATE
AND APPLICABLE FOREIGN SECURITIES LAWS IS NOT REQUIRED.

 

CASTELLUM,
INC.

2021 STOCK INCENTIVE PLAN

NOTICE OF STOCK OPTION GRANT

 

Castellum, Inc. (the
“Corporation”) hereby grants you the following Option to purchase shares of its common stock (“Shares”).
The terms and conditions of this Option are set forth in the Stock Option Agreement and the Castellum, Inc. 2021 Stock Incentive
Plan (the “Plan”), both of which are attached to and made a part of this document.

 

	Date of Grant:	[Date of Grant]
	 	 
	Name of Optionee:	[Name of Optionee]
	 	 
	Number of Option Shares:	[Number of Shares]

 

	Exercise Price per Share:	$[Exercise Price]  (The Exercise Price per Share of an Option shall not be less than one hundred percent (100%) of the Fair Market Value of a Share on the date of grant.  If the Optionee is deemed to be a Ten-Percent Stockholder, the Exercise Price per Share of an ISO must be at least one hundred ten percent (110%) of Fair Market Value.)

 

	Vesting Start Date:	[Vesting Start Date]
	 	 
	Type of Option:	[Type of Grant: NSO/ISO]
	 	 
	Vesting Schedule:	
        Subject to the terms
        and conditions set forth in Section 2 of the Stock Option Agreement, [the Option vests over four years. The Option vests with respect
        to the first 25% of the total option Shares when the Optionee completes 12 months of Continuous Service after the Vesting
        Start Date, and with respect to an additional 1/48th of the total option Shares when the Optionee completes each full month of
        Continuous Service thereafter.] Fractional vested Shares will be rounded down to the nearest whole number of Shares at all times.

         

        In the event that there is a Change in
        Control (as defined below) during Optionee’s period of Continuous Service, then, to the extent that, at the time of the Change
        in Control, the Option is unvested and is continued or assumed by the Corporation or the Corporation’s successor, the Option
        shall, subject to Optionee’s Continuous Service, continue to vest in accordance with the Vesting Schedule above, provided,
        however, that if, within one (1) year following the date of the Change in Control, Optionee is terminated by the Corporation or
        the Corporation’s successor without Cause (as defined in the Plan) and not for death or Disability (as defined in the Plan)
        or Optionee resigns with Good Reason (as defined below) (such termination, an “Involuntary Termination”), the Option
        shall accelerate and vest with respect to 100% of the Shares covered by the Option.

 

Castellum, Inc.

Notice of Stock Option Grant

 

    	 	-1-	 

     

    

 

	 	
        In the event that there
        is a Change in Control during Optionee’s period of Continuous Service, then, to the extent that, at the time of the Change
        in Control, the Option is unvested and is not continued or assumed by the Corporation or the Corporation’s successor, any
        payment in cash or property that would have been received by Optionee by reason of the Change in Control with respect to the Option
        had the Option been fully vested shall be unvested and shall vest on such date(s) as the Option would have otherwise become vested
        pursuant to the Vesting Schedule above (such payment right, the “Change in Control Payment Right”) and such vested
        Change in Control Payment Right shall be paid as provided in this paragraph. Notwithstanding the foregoing, if Optionee incurs
        an Involuntary Termination within one (1) year following the date of the Change in Control, the Change in Control Payment Right
        shall accelerate and vest with respect to one hundred percent (100%) of the unvested portion of the Change in Control Payment Right
        and such vested Change in Control Payment Right shall be paid as provided in this paragraph. Any portion of the Change in Control
        Payment Right which does not vest shall be forfeited by Optionee. The payment(s) shall be made at such times as determined by the
        Corporation in its discretion, provided that in no event shall the payment(s) be made later than two and one-half (2 1/2) months
        following the end of Optionee’s taxable year(s) during which vesting occurs, or, if later, the time of payment for shares
        of the Corporation’s common stock set forth in the definitive agreement providing for the Change in Control.

         

        Notwithstanding the foregoing,
        if Optionee’s Continuous Service terminates for any reason other than an Involuntary Termination within one (1) year following
        a Change in Control, the termination provisions of the Stock Option Agreement shall apply.

         

        Notwithstanding the foregoing,
        if Optionee’s Continuous Service terminates for any reason other than an Involuntary Termination within one (1) year following
        a Change in Control, the unvested portion of the Change in Control Payment Right shall be forfeited.

 

Castellum, Inc.

Notice of Stock Option Grant

 

    	 	-2-	 

     

    

 

	 	[IF
                           SINGLE TRIGGER OR DOUBLE TRIGGER CHANGE IN CONTROL VESTING IS INCLUDED, INCLUDE THE FOLLOWING DEFINITION OF
                           “CHANGE IN CONTROL”]

         

        [For
        purposes of this Agreement, “Change in Control” means: (i) an individual, person, general partnership, limited partnership,
        limited liability partnership, limited liability company, corporation, joint venture, trust, business trust, cooperative, association,
        foreign trust, foreign business organization or other entity, together with any affiliate of the foregoing (other than (x) the
        Corporation, (y) any trustee or other fiduciary holding securities under an employee benefit plan of the Corporation, or (z)
        a stockholder of the Corporation as of the date of this Agreement, an immediate family member of such stockholder or a trust
        or other entity owned solely by or for the benefit of any such persons ) (a “Person”) acquires (other than solely
        by reason of a repurchase of voting securities by the Corporation) more than 50% of the combined voting power of the Corporation's
        then total outstanding voting securities; (ii) there is consummated a merger or consolidation of the Corporation with any other
        corporation or other entity, other than (A) a merger or consolidation which results in the voting securities of the Corporation
        outstanding immediately prior to such merger or consolidation continuing to represent (either by remaining outstanding or by
        being converted into voting securities of the surviving entity or any parent thereof) at least 50% of the combined voting power
        of the securities of the Corporation or such surviving entity or any direct or indirect parent thereof outstanding immediately
        after such merger or consolidation or (B) a merger or consolidation effected to implement a recapitalization of the Corporation
        (or similar transaction) in which no Person is or becomes the beneficial owner, directly or indirectly, of securities of the
        Corporation (meaning that such Person is entitled to the benefits of ownership although such Person does not have possession
        of or title to such securities) (not including in the securities beneficially owned by such Person any securities acquired directly
        from the Corporation or its affiliates) representing 50% or more of the combined voting power of the Corporation's then outstanding
        securities; (iii) the Corporation sells all or substantially all of the assets of the Corporation, or sells or exclusively licenses
        all or substantially all of the intellectual property of the Corporation; or (iv) the stockholders of the Corporation approve
        a plan of complete liquidation or dissolution; provided, however, that in no event shall an initial public offering of the capital
        stock of the Corporation constitute a Change in Control for purposes of this Agreement.]

        

 

	 	[IF
        DOUBLE TRIGGER CHANGE IN CONTROL VESTING IS INCLUDED, INCLUDE THE FOLLOWING DEFINITION OF “GOOD REASON”]

         

        [For
        purposes of this Agreement, “Good Reason” means, without Optionee’s consent, (i) the relocation of Optionee’s
        principal place of employment or service by more than fifty (50) miles that is not cured within thirty (30) days after written
        notice is provided by Optionee to the Corporation, or (ii) a material reduction in Optionee’s base salary (other than a
        reduction pertaining to all similarly situated employees or service providers of the Corporation).]

 

Castellum,
Inc.

Notice of Stock Option Grant

 

    	 	-3-	 

     

    

 

By
signing this document, which may be accomplished by e-signature or other electronic indication of acceptance, you acknowledge receipt
of a copy of the Plan, and agree that (a) you have carefully read, fully understand and agree to all of the terms and conditions described
in the attached Stock Option Agreement, the Plan document and “Notice of Exercise and Common Stock Purchase Agreement” (the
“Exercise Notice”); (b) you hereby make the purchaser’s investment representations contained in the Exercise Notice
with respect to the grant of this Option; (c) you understand and agree that this Notice of Stock Option Grant, the Stock Option Agreement,
including its attachments, constitutes the entire understanding between you and the Corporation regarding this Option, and that any prior
agreements, commitments or negotiations concerning this Option are replaced and superseded; and (d) you have been given an opportunity
to consult your own legal and tax counsel with respect to all matters relating to this Option prior to signing this Notice of Stock Option
Grant and that you have either consulted such counsel or voluntarily declined to consult such counsel.

 

IF
YOU DO NOT RETURN TO THE CORPORATION A SIGNED COPY OF THIS NOTICE OF STOCK OPTION GRANT BY [_______
__, 20__], (THE “RETURN DATE”), THIS NOTICE OF STOCK OPTION GRANT AND THE ATTACHED STOCK OPTION AGREEMENT WILL AUTOMATICALLY
EXPIRE AS OF THE DATE IMMEDIATELY FOLLOWING THE RETURN DATE.

 

	[Name of Optionee]	 	Castellum, INC.
	 	 	 
	 	 	By:	 
	 	 	Its:	 

 

Castellum,
Inc.

Notice of Stock Option Grant

 

    	 	-4-	 

     

    

 

 

Castellum,
INC.

 

2021
Stock Incentive PLAN

 

STOCK
OPTION AGREEMENT

 

SECTION 1.    KIND
OF OPTION.

 

This
Option is intended to be either an incentive stock option intended to meet the requirements of section 422 of the Internal Revenue
Code (an “ISO”) or a non-statutory option (an “NSO”), which is not intended to meet the requirements of an ISO,
as indicated in the Notice of Stock Option Grant. Even if this Option is designated as an ISO, it shall be deemed to be an NSO to the
extent required by the $100,000 annual limitation under Section 422(d) of the Code.

 

SECTION 2.   VESTING.

 

Subject
to the terms and conditions of the Plan and this Stock Option Agreement (the “Agreement”), your Option will be exercisable
with respect to the Shares that have become vested in accordance with the schedule set forth in the Notice of Stock Option Grant. If
your Option is granted in consideration of your service to the Corporation or an Affiliate, after your Continuous Service terminates
for any reason, except as provided in the Plan, vesting of your Shares subject to such Option immediately stops and such Option expires
as to the number of Shares that are not vested as of the date your Continuous Service terminates.

 

SECTION 3.  
TERM.

 

Your
Option will expire in any event at the close of business at Corporation headquarters on the date that is ten (10) years after the Date
of Grant; provided, however, that if your Option is an ISO it will expire five (5) years after the Date of Grant if you are or are deemed
to be a Ten-Percent Owner (the “Expiration Date”). Also, your Option will expire earlier if your Continuous Service terminates,
as described below.

 

SECTION 4.
   REGULAR TERMINATION.

 

		(a)	If
                                            your Continuous Service terminates for any reason except death, Disability or Cause or when
                                            grounds for your termination for Cause exists, your Option will expire at the close of business
                                            at Corporation headquarters on the date three (3) months after your termination of Continuous
                                            Service. During that three (3) month period, you may exercise the vested portion of your
                                            Option. Notwithstanding the foregoing, the Option may not be exercised after the Expiration
                                            Date determined under Section 3 above.

 

		(b)	If
                                            your Continuous Service is terminated for Cause (as defined in the Plan) or you voluntarily
                                            terminate when grounds for your termination for Cause exists, your Option will expire immediately
                                            upon your termination of Continuous Service.

 

		(c)	If
                                            your Option is an ISO and you exercise it more than three (3) months after termination of
                                            your Continuous Service as an employee for any reason other than death or a “disability”
                                            within the meaning of Section 22(e)(3) of the Code (meaning you are unable to engage in any
                                            substantial gainful activity by reason of any medically determinable physical or mental impairment
                                            expected to result in death or to last for a continuous period of at least twelve (12) months),
                                            your Option will cease to be eligible for ISO tax treatment.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 1 -	 

     

    

 

		(d)	Your
                                            Option will cease to be eligible for ISO tax treatment if you exercise it more than three
                                            months after the ninetieth (90th) day of a bona fide leave of absence approved
                                            by the Corporation, unless you return to employment immediately upon termination of such
                                            leave or your right to reemployment after your leave was guaranteed by statute or contract.

 

SECTION 5.DEATH.

 

If
you die while in Continuous Service with the Corporation, the vested portion of your Option will expire at the close of business at Corporation
headquarters on the date twelve (12) months after the date of your death. During that twelve (12) month period, your estate, legatees
or heirs may exercise that portion of your Option that was vested on the date of your death. Notwithstanding the foregoing, the Option
may not be exercised after the Expiration Date determined under Section 3 above.

 

SECTION 6.DISABILITY.

 

		(a)	If
                                            your Continuous Service terminates because of a Disability (as defined in the Plan), the
                                            vested portion of your Option will expire at the close of business at Corporation headquarters
                                            on the date twelve (12) months after your termination date. During that twelve (12) month
                                            period, you may exercise that portion of your Option that was vested on the date of your
                                            Disability. Notwithstanding the foregoing, the Option may not be exercised after the Expiration
                                            Date determined under Section 3 above.

 

		(b)	If
                                            your Option is an ISO and your Disability is not expected to result in death or to last for
                                            a continuous period of at least twelve (12) months, your Option will be eligible for ISO
                                            tax treatment only if it is exercised within three (3) months following the termination of
                                            your Continuous Service as an employee.

 

SECTION 7.EXERCISING
YOUR OPTION.

 

To
exercise your Option, you must execute the Notice of Exercise and Common Stock Purchase Agreement (the “Exercise Notice”),
attached as Exhibit A. You must submit this form, together with full payment, to the Corporation. Your exercise will be effective
when it is received by the Corporation. If someone else wants to exercise your Option after your death, that person must prove to the
Corporation’s satisfaction that he or she is entitled to do so.

 

SECTION 8.PAYMENT
FORMS.

 

When
you exercise your Option, you must include payment of the Exercise Price for the Shares you are purchasing in cash or cash equivalents.
Alternatively, you may, with the consent of the Committee, pay all or part of the Exercise Price by surrendering, or attesting to ownership
of, Shares already owned by you, unless such action would cause the Corporation to recognize any (or additional) compensation expense
with respect to the Option for financial reporting purposes. Such Shares shall be surrendered to the Corporation in good form for transfer
and shall be valued at their Fair Market Value on the date of Option exercise. To the extent that a public market for the Shares exists
and to the extent permitted by applicable law, in each case as determined by the Corporation, you also may exercise your Option by delivery
(on a form prescribed by the Corporation) of an irrevocable direction to a securities broker to sell Shares and to deliver all or part
of the sale proceeds to the Corporation in payment of the aggregate Exercise Price and, if requested, applicable withholding taxes. The
Corporation will provide the forms necessary to make such a cashless exercise.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 2 -	 

     

    

 

SECTION 9.TAX
WITHHOLDING AND REPORTING.

 

		(a)	You
                                            will not be allowed to exercise this Option unless you pay, or make acceptable arrangements
                                            to pay, any taxes required to be withheld as a result of the Option exercise or the sale
                                            of Shares acquired upon exercise of this Option. You hereby authorize withholding from payroll
                                            or any other payment due you from the Corporation or your employer to satisfy any such withholding
                                            tax obligation.

 

		(b)	If
                                            you sell or otherwise dispose of any of the Shares acquired pursuant to an ISO on or before
                                            the later of (i) two years after the grant date, or (ii) one year after the exercise
                                            date, you shall immediately notify the Corporation in writing of such disposition.

 

		(c)	By
                                            accepting this Agreement, you explicitly and unambiguously consent and agree (i) to assume
                                            any liability for fringe benefit tax that may be payable by the Corporation and/or your employer
                                            in connection with the Option granted under this Agreement to the extent permitted under
                                            applicable law; (ii) that the Corporation and/or your employer may collect the fringe benefit
                                            tax from you by any reasonable method established by the Corporation and/or your employer;
                                            and (iii) you will execute any other consents or elections required to accomplish the above,
                                            promptly upon request of the Corporation and/or your employer.

 

SECTION 10.TRANSFER
RESTRICTION, RIGHT OF FIRST REFUSAL, CORPORATION PURCHASE RIGHTS AND DRAG ALONG RIGHTS.

 

You
will be subject to the “Transfer Restriction” set forth in Section 10 of the Plan (as amended from time to time). In addition,
in the event that you propose to sell, pledge or otherwise transfer to a third party any Shares acquired under this Agreement, or any
interest in such Shares, such sale, pledge or other transfer as permitted, the Corporation shall have a “Right of First Refusal”
with respect to such Shares or interest therein in accordance with the provisions of the Exercise Notice. In accordance with the Exercise
Notice, the Shares you receive on exercise will also be subject to the terms of the “Corporation Purchase Rights” in the
event of your termination of Continuous Service and Drag Along Rights upon a sale of the Corporation.

 

SECTION 11.RESALE
RESTRICTIONS/MARKET STAND-OFF.

 

In
connection with any underwritten public offering by the Corporation of its equity securities pursuant to an effective registration statement
filed under the U.S. Securities Act of 1933, as amended, including the Corporation’s initial public offering, you may be prohibited
from engaging in any transaction with respect to any of the Corporation’s common stock without the prior written consent of the
Corporation or its underwriters in accordance with the provisions of the Exercise Notice.

  

SECTION 12.TRANSFER
OF OPTION.

 

Prior
to your death, only you may exercise this Option. This Option and the rights and privileges conferred hereby cannot be sold, pledged
or otherwise transferred (whether by operation of law or otherwise) and shall not be subject to sale under execution, attachment, levy
or similar process. For instance, you may not sell this Option or use it as security for a loan. If you attempt to do any of these things,
this Option will immediately become invalid. You may, however, dispose of this Option in your will. Regardless of any marital property
settlement agreement, the Corporation is not obligated to honor an Exercise Notice from your spouse or former spouse, nor is the Corporation
obligated to recognize such individual’s interest in your Option in any other way. Notwithstanding the foregoing, however, to the
extent permitted by the Board in its sole discretion, an NSO may be transferred by you to one or more Immediate Family Members or to
a trust established for your benefit and/or one or more of your Immediate Family Members to the extent permitted by the Plan.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 3 -	 

     

    

 

SECTION 13.RETENTION
RIGHTS.

 

This
Agreement does not give you the right to be retained by the Corporation in any capacity. The Corporation reserves the right to terminate
your Service at any time and for any reason without thereby incurring any liability to you.

 

SECTION 14.STOCKHOLDER
RIGHTS.

 

Neither
you nor your estate or heirs have any rights as a stockholder of the Corporation until a certificate for the Shares acquired upon exercise
of this Option has been issued. No adjustments are made for dividends or other rights if the applicable record date occurs before your
stock certificate is issued, except as described in the Plan.

 

SECTION 15.ADJUSTMENTS.

 

In
the event of a stock split, a stock dividend or a similar change in the Corporation’s Stock, the number and class of Shares covered
by this Option and the Exercise Price per share may be adjusted pursuant to the Plan. Your Option shall be treated in the manner determined
by the Board in the event the Corporation is subject to an asset or stock sale, merger, liquidation, reorganization or other corporate
transaction as set forth in the Plan.

 

SECTION 16.LEGENDS.

 

All
certificates representing the Shares issued upon exercise of this Option shall, where applicable, have endorsed thereon the following
legends:

 

THE
SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED OR QUALIFIED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED, OR
THE SECURITIES LAWS OF ANY STATE OR FOREIGN JURISDICTION, AND MAY BE OFFERED AND SOLD ONLY IF REGISTERED AND QUALIFIED PURSUANT TO THE
RELEVANT PROVISIONS OF U.S. FEDERAL, STATE AND APPLICABLE FOREIGN SECURITIES LAWS OR IF THE CORPORATION IS PROVIDED AN OPINION OF COUNSEL
SATISFACTORY TO THE CORPORATION THAT REGISTRATION AND QUALIFICATION UNDER U.S. FEDERAL, STATE AND APPLICABLE FOREIGN SECURITIES LAWS
IS NOT REQUIRED.

 

THE
SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD, TRANSFERRED, ENCUMBERED OR IN ANY MANNER DISPOSED OF, EXCEPT IN COMPLIANCE
WITH THE TERMS OF THE CORPORATIONS’ STOCK PLAN AND A WRITTEN AGREEMENT BETWEEN THE CORPORATION AND THE INITIAL HOLDER HEREOF. SUCH
PLAN AND AGREEMENT PROVIDE FOR CERTAIN TRANSFER RESTRICTIONS, INCLUDING LIMITATION ON TRANSFERS, RIGHTS OF FIRST REFUSAL UPON AN ATTEMPTED
TRANSFER OF THE SECURITIES AND A REPURCHASE RIGHT ON TERMINATION OF SERVICE. THE CORPORATION WILL NOT REGISTER OR OTHERWISE RECOGNIZE
OR GIVE EFFECT TO ANY PURPORTED TRANSFER OF SECURITIES THAT DOES NOT COMPLY WITH SUCH TRANSFER RESTRICTIONS. THE SECRETARY OF THE CORPORATION
WILL UPON WRITTEN REQUEST FURNISH A COPY OF SUCH PLAN AND AGREEMENT TO THE HOLDER HEREOF WITHOUT CHARGE.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 4 -	 

     

    

 

If
the Option is an ISO, then the following legend should be included:

 

THE
SHARES REPRESENTED BY THIS CERTIFICATE WERE ISSUED UPON EXERCISE OF AN INCENTIVE STOCK OPTION, AND THE CORPORATION MUST BE NOTIFIED IF
THE SHARES SHALL BE TRANSFERRED BEFORE THE LATER OF THE TWO (2) YEAR ANNIVERSARY OF THE DATE OF GRANT OF THE OPTION OR THE ONE (1) YEAR
ANNIVERSARY OF THE DATE ON WHICH THE OPTION WAS EXERCISED. THE REGISTERED HOLDER MAY RECOGNIZE ORDINARY INCOME IF THE SHARES ARE TRANSFERRED
BEFORE SUCH DATE.

 

SECTION 17.TAX
DISCLAIMER.

 

You
agree that you are responsible for consulting your own tax advisor as to the tax consequences associated with your Option. The tax rules
governing options are complex, change frequently and depend on the individual taxpayer’s situation. For your information, a memorandum
that briefly summarizes current U.S. federal income tax law relating to certain aspects of stock options is attached hereto as Exhibit
B. Please note that this memorandum does not purport to be complete. Although the Corporation will make available to you general tax
information about stock options, you agree that the Corporation shall not be held liable or responsible for making such information available
to you and any tax or financial consequences that you may incur in connection with your Option.

 

In
addition, as noted in Exhibit B, options granted at a discount from fair market value may be considered “deferred compensation”
subject to adverse tax consequences under Section 409A of the Internal Revenue Code. The Board has made a good faith determination that
the exercise price per share of the Option is not less than the fair market value of the Shares underlying your Option on the Date of
Grant. It is possible, however, that the Internal Revenue Service could later challenge that determination and assert that the fair market
value of the Shares underlying your Option was greater on the Date of Grant than the exercise price determined by the Board, which could
result in immediate income tax upon the vesting of your Option (whether or not exercised) and a 20% tax penalty, as well as the loss
of incentive stock option status (if applicable). The Corporation gives no assurance that such adverse tax consequences will not occur
and specifically assumes no responsibility therefor. By accepting this Option, you acknowledge that any tax liability or other adverse
tax consequences to you resulting from the grant of the Option will be the responsibility of, and will be borne entirely by, you. 
YOU ARE THEREFORE ENCOURAGED TO CONSULT YOUR OWN TAX ADVISOR BEFORE ACCEPTING THE GRANT OF THIS OPTION.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 5 -	 

     

    

 

SECTION 18.THE
PLAN AND OTHER AGREEMENTS.

 

The
text of the Plan is incorporated in this Agreement by reference. Certain capitalized terms used in this Agreement are defined in the
Plan. The Notice of Stock Option Grant, this Agreement, including its attachments, and the Plan constitute the entire understanding between
you and the Corporation regarding this Option. Any prior agreements, commitments or negotiations concerning this Option are superseded.

 

SECTION 19.MISCELLANEOUS
PROVISIONS.

 

		(a)	You
                                            understand and acknowledge that (i) the Plan is entirely discretionary, (ii) the
                                            Corporation and your employer have reserved the right to amend, suspend or terminate the
                                            Plan at any time, (iii) the grant of an option does not in any way create any contractual
                                            or other right to receive additional grants of options (or benefits in lieu of options) at
                                            any time or in any amount and (iv) all determinations with respect to any additional
                                            grants, including (without limitation) the times when options will be granted, the number
                                            of Shares offered, the Exercise Price and the vesting schedule, will be at the sole discretion
                                            of the Corporation.

 

		(b)	The
                                            value of this Option shall be an extraordinary item of compensation outside the scope of
                                            your employment contract, if any, and shall not be considered a part of your normal or expected
                                            compensation for purposes of calculating severance, resignation, redundancy or end-of-service
                                            payments, bonuses, long-service awards, pension or retirement benefits or similar payments.

 

		(c)	You
                                            understand and acknowledge that participation in the Plan ceases upon termination of your
                                            Continuous Service for any reason, except as may explicitly be provided otherwise in the
                                            Plan or this Agreement.

 

		(d)	You
                                            hereby authorize and direct your employer to disclose to the Corporation or any Affiliate
                                            any information regarding your employment, the nature and amount of the your compensation
                                            and the fact and conditions of your participation in the Plan, as your employer deems necessary
                                            or appropriate to facilitate the administration of the Plan.

 

		(e)	You
                                            consent to the collection, use and transfer of personal data as described in this Subsection.
                                            You understand and acknowledge that the Corporation, your employer and the Corporation’s
                                            other Affiliates hold certain personal information regarding you for the purpose of managing
                                            and administering the Plan, including (without limitation) your name, home address, telephone
                                            number, date of birth, social insurance number, salary, nationality, job title, any Shares
                                            or directorships held in the Corporation and details of all options or any other entitlements
                                            to Shares awarded, canceled, exercised, vested, unvested or outstanding in the your favor
                                            (the “Data”). You further understand and acknowledge that the Corporation and/or
                                            its Affiliates will transfer Data among themselves as necessary for the purpose of implementation,
                                            administration and management of your participation in the Plan and that the Corporation
                                            and/or any Affiliate may each further transfer Data to any third party assisting the Corporation
                                            in the implementation, administration and management of the Plan. You understand and acknowledge
                                            that the recipients of Data may be located in the United States or elsewhere. You authorize
                                            such recipients to receive, possess, use, retain and transfer Data, in electronic or other
                                            form, for the purpose of administering your participation in the Plan, including a transfer
                                            to any broker or other third party with whom you elect to deposit Shares acquired under the
                                            Plan of such Data as may be required for the administration of the Plan and/or the subsequent
                                            holding of Shares on your behalf. You may, at any time, view the Data, require any necessary
                                            modifications of Data or withdraw the consents set forth in this Subsection by contacting
                                            the Human Resources Department of the Corporation in writing.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 6 -	 

     

    

 

SECTION 20.APPLICABLE
LAW; VENUE.

 

This
Agreement will be interpreted and enforced under the laws of the State of Nevada (without regard to their choice of law provisions).
The parties agree that any action brought by either party to interpret or enforce any provision of this Agreement shall be brought in,
and each party agrees to, and does hereby, submit to the jurisdiction and venue of, the appropriate state court or federal district court
for the area in which the Corporation’s headquarters is located.

 

Castellum,
Inc.

Stock Option Agreement

 

    	 	 - 7 -	 

     

    

 

EXHIBIT A

 

Castellum,
INC. 2021 Stock Incentive PLAN

NOTICE OF EXERCISE AND COMMON STOCK PURCHASE AGREEMENT

 

THIS
AGREEMENT is dated as of ___________, ____, between Castellum, Inc. (the “Corporation”), and [Name
of Optionee] (“Purchaser”).

 

W
I T N E S S E T H:

 

WHEREAS,
the Corporation granted Purchaser a stock option on ___________, (the “Date of Grant”) pursuant to a stock option agreement
(the “Option Agreement”) under which Purchaser has the right to purchase up to [Number
of Shares] shares of the Corporation’s common stock (the “Option Shares”); and

 

WHEREAS,
the Option is exercisable with respect to certain of the Option Shares as of the date hereof; and

 

WHEREAS,
pursuant to the Option Agreement, Purchaser desires to purchase shares of the Corporation as herein described, on the terms and conditions
set forth in this Agreement, the Option Agreement and the Castellum, Inc. 2021 Stock Incentive Plan (the “Plan”). Certain
capitalized terms used in this Agreement are defined in the Plan.

 

NOW,
THEREFORE, it is agreed between the parties as follows:

 

SECTION 1.PURCHASE
OF SHARES.

 

(a)       Pursuant
to the terms of the Option Agreement, Purchaser hereby agrees to purchase from the Corporation and the Corporation agrees to sell and
issue to Purchaser _________ shares of the Corporation’s common stock (the “Common
Stock”) for the Exercise Price per share specified in the Notice of Stock Option Grant payable by personal check, cashier’s
check, money order or otherwise as permitted by the Option Agreement. Payment shall be delivered at the Closing, as such term is defined
below.

 

(b)       The
closing (the “Closing”) under this Agreement shall occur at the offices of the Corporation as of the date hereof, or such
other time and place as may be designated by the Corporation (the “Closing Date”).

 

(c)       Notwithstanding
the foregoing, the Closing under this Agreement shall be conditioned on Purchaser’s execution of such agreements as may be required
of the stockholders of the Corporation generally in connection with any preferred stock financing round that occurs subsequent to the
Date of Grant, including, but not limited to, any voting agreement, investor rights agreement, right of first refusal and co-sale agreement,
or other similar stockholder agreement (“Subsequent Investor Agreements”). In the event that Purchaser is required to execute
the Subsequent Investor Agreements, then the Closing shall not occur unless and until Purchaser has executed the Subsequent Investor
Agreements. In the event of any conflict between the applicable Subsequent Investor Agreements and the Notice of Stock Option Grant,
the Option Agreement, the Plan or this Agreement, including with respect to any rights of first refusal, drag-along rights or market
stand-off provisions, the terms of the applicable Subsequent Investor Agreements shall control.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-1 	 

     

    

 

SECTION 2.ADJUSTMENT
OF SHARES.

 

Subject
to the provisions of the Articles of Incorporation of the Corporation, if (a) there is any stock dividend or liquidating dividend
of cash and/or property, stock split or other change in the character or amount of any of the outstanding securities of the Corporation,
or (b) there is any consolidation, merger or sale of all or substantially all of the assets of the Corporation, then, in such event,
any and all new, substituted or additional securities or other cash or property to which Purchaser is entitled by reason of Purchaser’s
ownership of the shares shall be immediately subject to the terms of the Transfer Restriction provided for in the Plan, and this Agreement,
including but not limited to the Right of First Refusal, Transfer Restriction and Purchase Rights as provided below, with the same force
and effect as the shares subject to such provisions. Appropriate adjustments shall be made to the number and/or class of shares subject
to terms of this Agreement to reflect the exchange or distribution of such securities. In the event of a merger or consolidation of the
Corporation with or into another entity or any other corporate reorganization, the Corporation’s rights may be exercised by the
Corporation’s successor.

 

SECTION 3.TRANSFER
RESTRICTION AND THE CORPORATION’S RIGHT OF FIRST REFUSAL.

 

Purchaser
acknowledges that the shares of Common Stock received under this Agreement are subject to the transfer restrictions set forth in Section
10 of the Plan (as may be amended from time to time) (the “Transfer Restriction”). In addition, before any shares of Common
Stock registered in the name of Purchaser may be sold or transferred, such shares shall first be offered to the Corporation pursuant
to the right of first refusal contained in the Corporation’s bylaws as amended from time to time, and in the absence of any such
provision in the bylaws, then as follows (the “Right of First Refusal”):

 

(a)       Purchaser
shall promptly deliver a notice (“Notice”) to the Corporation stating (i) Purchaser’s bona fide intention to sell
or transfer such shares and the identity of the proposed purchaser or transferee, (ii) the number of such shares to be sold or transferred,
and the basic terms and conditions of such sale or transfer, (iii) the price for which Purchaser proposes to sell or transfer such
shares, (iv) the name of the proposed purchaser or transferee, and (v) proof satisfactory to the Corporation that the proposed
sale or transfer will not violate any applicable U.S. federal, state or foreign securities laws. The Notice shall be signed by both Purchaser
and the proposed purchaser or transferee and must constitute a binding commitment subject to the Corporation’s Right of First Refusal
as set forth herein.

 

(b)       Within
thirty (30) days after receipt of the Notice, the Corporation may elect to purchase all or any portion of the shares to which the Notice
refers, at the price per share specified in the Notice. If the Corporation elects not to purchase all or any portion of the shares, the
Corporation may assign its right to purchase all or any portion of the shares. The assignees may elect within thirty (30) days after
receipt by the Corporation of the Notice to purchase all or any portion of the shares to which the Notice refers, at the price per share
specified in the Notice. If the price specified in the Notice consists of no legal consideration (as, for example, in the case of a transfer
by gift), the purchase price will be the fair market value of the shares as determined in good faith by the Corporation. An election
to purchase shall be made by written notice to Purchaser. Payment for shares purchased pursuant to this Section 3 shall be made
within thirty (30) days after receipt of the Notice by the Corporation and, at the option of the Corporation, may be made by cancellation
of all or a portion of outstanding indebtedness, if any, or in cash or both.

 

(c)       If
all or any portion of the shares to which the Notice refers are not elected to be purchased, as provided in subparagraph 3(b), Purchaser
may sell those shares to any person named in the Notice at the price specified in the Notice, provided that such sale or transfer is
consummated within sixty (60) days of the date of said Notice to the Corporation, and provided, further, that any such sale is made in
compliance with applicable U.S. federal, state and foreign securities laws and not in violation of any other contractual restrictions
to which Purchaser is bound. The third-party purchaser shall be bound by, and shall acquire the shares subject to, the provisions of
this Agreement, including the Corporation’s Right of First Refusal.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-2 	 

     

    

 

(d)       Any
proposed transfer on terms and conditions different from those set forth in the Notice, as well as any subsequent proposed transfer shall
again be subject to the Corporation’s Right of First Refusal and shall require compliance with the procedures described in this
Section 3.

 

(e)       Purchaser
agrees to cooperate affirmatively with the Corporation, to the extent reasonably requested by the Corporation, to enforce rights and
obligations pursuant to this Agreement.

 

(f)       Notwithstanding
the above, neither the Corporation nor any assignee of the Corporation under this Section 3 shall have any right under this Section 3
at any time subsequent to the closing of a public offering of the common stock of the Corporation pursuant to a registration statement
declared effective under the U.S. Securities Act of 1933, as amended (the “Securities Act”).

 

(g)       This
Section 3 shall not apply to (i) a transfer by will or intestate succession, or (ii) a transfer to one or more of Purchaser’s
Immediate Family Members (defined below) or to a trust established by Purchaser for the benefit of Purchaser and/or one or more of Purchaser’s
Immediate Family Members, provided that the transferee agrees in writing on a form prescribed by the Corporation to be bound by all of
the provisions of this Agreement to the same extent as they apply to Purchaser. The transferee shall execute a copy of the attached Annex
I and file the same with the Secretary of the Corporation. For purposes of this Agreement, Immediate Family Member means any child,
stepchild, grandchild, parent, stepparent, grandparent, spouse, sibling, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law
or sister-in-law, and shall include adoptive relationships.

 

(h)       In
the event of any transfer by operation of law or other involuntary transfer (including death, whether by will or intestate succession,
or divorce, but excluding a transfer to an Immediate Family Member as set forth in Section 3(g) above) of all or a portion of the shares
of Common Stock held by the record holder thereof, the Corporation’s Right of First Refusal shall consist of an option to purchase
all of the shares transferred at the fair market value of the shares on the date of transfer (as determined by the Board). Upon such
a transfer, the person acquiring the shares shall promptly notify the Secretary of the Corporation of such transfer. The right to purchase
such shares shall be provided to the Corporation for a period of thirty (30) days following receipt by the Corporation of written notice
by the person acquiring the shares.

 

(i)       Notwithstanding
anything to the contrary set forth in this Agreement, Purchaser hereby agrees to be bound by any and all restrictions on the transfer
of shares of Common Stock as set forth in the Corporation’s bylaws (as may be amended from time to time) and that such transfer
restrictions shall supersede all other agreements, whether written or oral, in place by and between the Corporation and Purchaser regarding
the transfer of the shares of Common Stock.

 

SECTION 4.CORPORATION
PURCHASE RIGHT

 

(a)       At
any time within the one (1)-year period following the Purchaser’s termination of Continuous Service with the Corporation for any
reason or, if later, the date of purchase of Common Stock upon exercise of the Option Agreement, the Corporation shall have the option
(exercisable by written notice to the Purchaser or the transferee of Purchaser) to purchase, and the Purchaser (or the transferee of
Purchaser) shall sell, all of the shares of Common Stock then owned by the Purchaser (or the transferee of Purchaser) acquired under
the Plan in accordance with the procedures set forth in Section 4(b) below.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-3 	 

     

    

 

(b)       The
purchase price therefor shall be paid in cash and shall be equal to the then fair market value thereof as determined by the Board of
Directors. Such fair market value shall be determined as of the day the Corporation elects to exercise its Purchase Right under this
Section and the Board of Directors’ good faith determination shall be binding on all parties. Such purchase price shall be paid
within thirty (30) days after such fair market value is established, provided, however, should the Corporation have insufficient funds
to pay such purchase price in a lump sum or if the Board otherwise elects in its discretion, then, at the option of the Corporation,
such purchase price shall be paid in five (5) consecutive equal annual payments, the first being made within thirty (30) days after such
fair market value is established, and the four (4) remaining payments being made on the first, second, third and fourth anniversary of
the first payment, with interest at the applicable federal rate under Section 1274(d) of the Internal Revenue Code using the mid-term
rate for the month of the purchase.

 

(c)       Notwithstanding
the above, the Corporation shall not have any right under this Section 4 at any time subsequent to the closing of a public offering of
the common stock of the Corporation pursuant to a registration statement declared effective under the Securities Act.

 

SECTION 5.PURCHASER’S
RIGHTS AFTER EXERCISE OF RIGHT OF FIRST REFUSAL OR PURCHASE.

 

If
the Corporation makes available, at the time and place and in the amount and form provided in this Agreement, the consideration for the
Common Stock to be repurchased in accordance with the provisions of Sections 3 or 4 of this Agreement, then from and after such
time the person from whom such shares are to be repurchased shall no longer have any rights as a holder of such shares (other than the
right to receive payment of such consideration in accordance with this Agreement). Such shares shall be deemed to have been repurchased
in accordance with the applicable provisions hereof, whether or not the certificate(s) therefor have been delivered as required by this
Agreement.

 

SECTION 6.LEGEND
OF SHARES.

 

All
certificates representing the Common Stock purchased under this Agreement shall, where applicable, have endorsed thereon the following
legends and any other legends required by applicable securities laws:

 

THE
SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED OR QUALIFIED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED, OR
THE SECURITIES LAWS OF ANY STATE OR FOREIGN JURISDICTION, AND MAY BE OFFERED AND SOLD ONLY IF REGISTERED AND QUALIFIED PURSUANT TO THE
RELEVANT PROVISIONS OF U.S. FEDERAL, STATE AND APPLICABLE FOREIGN SECURITIES LAWS OR IF THE CORPORATION IS PROVIDED AN OPINION OF COUNSEL
SATISFACTORY TO THE CORPORATION THAT REGISTRATION AND QUALIFICATION UNDER U.S. FEDERAL, STATE AND APPLICABLE FOREIGN SECURITIES LAWS
IS NOT REQUIRED.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-4 	 

     

    

 

THE
SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD, TRANSFERRED, ENCUMBERED OR IN ANY MANNER DISPOSED OF, EXCEPT IN COMPLIANCE
WITH THE TERMS OF THE CORPORATIONS’ STOCK PLAN AND A WRITTEN AGREEMENT BETWEEN THE CORPORATION AND THE INITIAL HOLDER HEREOF. SUCH
PLAN AND AGREEMENT PROVIDE FOR CERTAIN TRANSFER RESTRICTIONS, INCLUDING LIMITATION ON TRANSFERS, RIGHTS OF FIRST REFUSAL UPON AN ATTEMPTED
TRANSFER OF THE SECURITIES AND A REPURCHASE RIGHT ON TERMINATION OF SERVICE. THE CORPORATION WILL NOT REGISTER OR OTHERWISE RECOGNIZE
OR GIVE EFFECT TO ANY PURPORTED TRANSFER OF SECURITIES THAT DOES NOT COMPLY WITH SUCH TRANSFER RESTRICTIONS. THE SECRETARY OF THE CORPORATION
WILL UPON WRITTEN REQUEST FURNISH A COPY OF SUCH PLAN AND AGREEMENT TO THE HOLDER HEREOF WITHOUT CHARGE.

 

If
the Option is an ISO, then the following legend should be included:

 

THE
SHARES REPRESENTED BY THIS CERTIFICATE WERE ISSUED UPON EXERCISE OF AN INCENTIVE STOCK OPTION, AND THE CORPORATION MUST BE NOTIFIED IF
THE SHARES SHALL BE TRANSFERRED BEFORE THE LATER OF THE TWO (2) YEAR ANNIVERSARY OF THE DATE OF GRANT OF THE OPTION OR THE ONE (1) YEAR
ANNIVERSARY OF THE DATE ON WHICH THE OPTION WAS EXERCISED. THE REGISTERED HOLDER MAY RECOGNIZE ORDINARY INCOME IF THE SHARES ARE TRANSFERRED
BEFORE SUCH DATE.

 

SECTION 7.PURCHASER’S
INVESTMENT REPRESENTATIONS.

 

(a)
       This Agreement is made with Purchaser in reliance upon Purchaser’s representation to
the Corporation, which by Purchaser’s acceptance hereof Purchaser confirms, that the Common Stock which Purchaser will receive
will be acquired with Purchaser’s own funds for investment for an indefinite period for Purchaser’s own account, not as a
nominee or agent, and not with a view to the sale or distribution of any part thereof, and that Purchaser has no present intention of
selling, granting participation in, or otherwise distributing the same, but subject, nevertheless, to any requirement of law that the
disposition of Purchaser’s property shall at all times be within Purchaser’s control. By executing this Agreement, Purchaser
further represents that Purchaser does not have any contract, understanding or agreement with any person to sell, transfer, or grant
participation to such person or to any third person, with respect to any of the Common Stock.

 

(b)       Purchaser
understands that the Common Stock will not be registered or qualified under applicable U.S. federal, state or foreign securities laws
on the ground that the sale provided for in this Agreement is exempt from registration or qualification under applicable U.S. federal,
state or foreign securities laws and that the Corporation’s reliance on such exemption is predicated on Purchaser’s representations
set forth herein.

 

(d)       Purchaser
agrees that in no event shall Purchaser make a disposition of any of the Common Stock (including a disposition under Section 3 of
this Agreement), unless and until (i) Purchaser shall have notified the Corporation of the proposed disposition and shall have furnished
the Corporation with a statement of the circumstances surrounding the proposed disposition and (ii) Purchaser shall have furnished
the Corporation with an opinion of counsel satisfactory to the Corporation to the effect that (A) such disposition will not require
registration or qualification of such Common Stock under applicable U.S. federal, state or foreign securities laws or (B) appropriate
action necessary for compliance with the applicable U.S. federal, state or foreign securities laws has been taken or (iii) the Corporation
shall have waived, expressly and in writing, its rights under clauses (i) and (ii) of this Section.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-5 	 

     

    

 

(e)       With
respect to a transaction occurring prior to such date as the Plan and Common Stock thereunder are covered by a valid Form S-8 or similar
U.S. federal registration statement, this Subsection shall apply unless the transaction is covered by the exemption from registration
or qualification under applicable state law. In connection with the investment representations made herein, Purchaser represents that
Purchaser is able to fend for himself or herself in the transactions contemplated by this Agreement, has such knowledge and experience
in financial and business matters as to be capable of evaluating the merits and risks of Purchaser’s investment, has the ability
to bear the economic risks of Purchaser’s investment and has been furnished with and has had access to such information as would
be made available in the form of a registration statement together with such additional information as is necessary to verify the accuracy
of the information supplied and to have all questions answered by the Corporation.

 

(f)       Purchaser
understands that if the Corporation does not register with the U.S. Securities and Exchange Commission pursuant to section 12 of
the U.S. Securities Exchange Act of 1934, as amended, or if a registration statement covering the Common Stock (or a filing pursuant
to the exemption from registration under Regulation A of the Securities Act) under the Securities Act is not in effect when Purchaser
desires to sell the Common Stock, Purchaser may be required to hold the Common Stock for an indeterminate period. Purchaser also acknowledges
that Purchaser understands that any sale of the Common Stock which might be made by Purchaser in reliance upon Rule 144 under the Securities
Act may be made only in limited amounts in accordance with the terms and conditions of that Rule.

 

SECTION 8.NO
DUTY TO TRANSFER IN VIOLATION OF THIS AGREEMENT.

 

The
Corporation shall not be required (a) to transfer on its books any shares of Common Stock of the Corporation which shall have been
sold or transferred in violation of any of the provisions set forth in this Agreement or (b) to treat as owner of such shares or
to accord the right to vote as such owner or to pay dividends to any transferee to whom such shares shall have been so transferred. Any
sale or transfer of the shares of Common Stock shall be void unless the provisions of this Agreement are satisfied.

 

SECTION 9.RIGHTS
OF PURCHASER.

 

(a)       Except
as otherwise provided herein, Purchaser shall, during the term of this Agreement, exercise all rights and privileges of a stockholder
of the Corporation with respect to the Common Stock.

 

(b)       Nothing
in this Agreement shall be construed as a right by Purchaser to be retained by the Corporation, or an Affiliate of the Corporation in
any capacity. The Corporation reserves the right to terminate Purchaser’s Service at any time and for any reason without thereby
incurring any liability to Purchaser.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-6 	 

     

    

 

SECTION 10.RESALE
RESTRICTIONS/MARKET STAND-OFF.

 

Purchaser
hereby agrees that in connection with any underwritten public offering by the Corporation of its equity securities pursuant to an effective
registration statement filed under the Securities Act, including the Corporation’s initial public offering, Purchaser shall not,
directly or indirectly, engage in any transaction prohibited by the underwriter, or sell, make any short sale of, contract to sell, transfer
the economic risk of ownership in, loan, hypothecate, pledge, grant any option for the purchase of, or otherwise dispose or transfer
for value or agree to engage in any of the foregoing transactions with respect to any Common Stock without the prior written consent
of the Corporation or its underwriters, for such period of time after the effective date of such registration statement as may be requested
by the Corporation or such underwriters. Such period of time shall not exceed one hundred eighty (180) days and may be required by the
underwriter as a market condition of the offering; provided, however, that if either (a) during the last seventeen (17) days of such
one hundred eighty (180) day period, the Corporation issues an earnings release or material news or a material event relating to the
Corporation occurs or (b) prior to the expiration of such one hundred eighty (180) day period, the Corporation announces that it will
release earnings results during the sixteen (16) day period beginning on the last day of the one hundred eighty (180) day period, then
the restrictions imposed during such one hundred eighty (180) day period shall continue to apply until the expiration of the eighteen
(18) day period beginning on the issuance of the earnings release or the occurrence of the material news or material event; provided,
further, that in the event the Corporation or the underwriter requests that the one hundred eighty (180) day period be extended or modified
pursuant to then-applicable law, rules, regulations or trading policies, the restrictions imposed during the one hundred eighty (180)
day period shall continue to apply to the extent requested by the Corporation or the underwriter to comply with such law, rules, regulations
or trading policies. Purchaser hereby agrees to execute and deliver such other agreements as may be reasonably requested by the Corporation
or the underwriter which are consistent with the foregoing or which are necessary to give further effect thereto. To enforce the provisions
of this Section, the Corporation may impose stop-transfer instructions with respect to the Common Stock until the end of the applicable
stand-off period.

 

SECTION 11.RIGHT
TO COMPEL SALE (DRAG-ALONG RIGHTS)

 

Notwithstanding
any provision of this Agreement to the contrary, if at any time the Board of Directors approves a sale of the Corporation, Purchaser
agrees that he or she will consent to and raise no objections against the sale of the Corporation, and if the sale of the Corporation
is structured as (i) a merger or consolidation of the Corporation, or a sale of all or substantially all of the assets of the Corporation,
Purchaser will waive any dissenters' rights, appraisal rights or similar rights in connection with such merger, consolidation or asset
sale, or (ii) a sale of all or substantially all of the Common Stock of the Corporation, Purchaser agrees to sell all of his or her shares
of Common Stock acquired under the Plan in the sale of the Corporation, on the terms and conditions approved by the Board of Directors.
Purchaser hereby agrees to take all necessary and desirable actions approved by the Board of Directors in connection with the consummation
of the sale of the Corporation, including voting for, giving written consent to the sale of the Corporation and executing such agreements
and such instruments and completing other actions reasonably necessary to (x) provide customary representations, warranties, indemnities,
and escrow arrangements relating to such sale of the Corporation and (y) effectuate the allocation and distribution of the aggregate
consideration upon the sale of the Corporation.

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-7 	 

     

    

 

SECTION 12.OTHER
NECESSARY ACTIONS.

 

The
parties agree to execute such further instruments and to take such further action as may reasonably be necessary to carry out the intent
of this Agreement.

 

SECTION 13.NOTICE.

 

Any
notice required or permitted under this Agreement shall be given in writing and shall be deemed effectively given upon the earliest of
personal delivery, receipt or the third full day following deposit in the United States Post Office with postage and fees prepaid, addressed
to the other party hereto at the address last known or at such other address as such party may designate by ten (10) days’ advance
written notice to the other party hereto.

 

SECTION 14.SUCCESSORS
AND ASSIGNS.

 

This
Agreement shall inure to the benefit of the successors and assigns of the Corporation and, subject to the restrictions on transfer herein
set forth, be binding upon Purchaser and Purchaser’s heirs, executors, administrators, successors and assigns. The failure of the
Corporation in any instance to exercise the Right of First Refusal, Purchase Right, Transfer Restriction or other right described herein
shall not constitute a waiver of any of such rights as may subsequently arise under the provisions of this Agreement. No waiver of any
breach or condition of this Agreement shall be deemed to be a waiver of any other or subsequent breach or condition, whether of a like
or different nature.

 

SECTION 15.APPLICABLE
LAW.

 

This
Agreement shall be governed by, and construed in accordance with, the laws of the State of Nevada, as such laws are applied to contracts
entered into and performed in such state.

 

SECTION 16.NO
ORAL MODIFICATION.

 

No
modification of this Agreement shall be valid unless made in writing and signed by the parties hereto.

 

SECTION 17.ENTIRE
AGREEMENT.

 

This
Agreement, the Option Agreement and the Plan constitute the entire complete and final agreement between the parties hereto with regard
to the subject matter hereof.

 

IN
WITNESS WHEREOF, the parties have executed this Agreement as of the day and year first above written.

 

	Castellum, INC.	 	[Name of Optionee] (PURCHASER)
	 	 	 	 
	By	 	 	 
	Its	 	 	Signature

 

Castellum,
Inc.

Exhibit A to Stock Option Agreement

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 A-8 	 

     

    

 

ANNEX
I

 

ACKNOWLEDGMENT
OF AND AGREEMENT TO BE BOUND

BY THE NOTICE OF EXERCISE AND COMMON STOCK PURCHASE AGREEMENT OF

Castellum, inc.

 

The
undersigned, as transferee of shares of Castellum, Inc. hereby acknowledges that he or she has read and reviewed the terms of the Notice
of Exercise and Common Stock Purchase Agreement of Castellum, Inc. and hereby agrees to be bound by the terms and conditions thereof,
as if the undersigned had executed said Agreement as an original party thereto.

 

Dated:
____________________, ____.

 

	 	 
	 	 (Signature of Transferee)
	 	 
	 	 
	 	 (Printed Name of Transferee)

 

Castellum,
Inc.

Annex I to 

Notice
of Exercise and Common Stock Purchase Agreement

 

    	 	 - 1 -	 

     

    

 

EXHIBIT B

 

U.S.
FEDERAL TAX INFORMATION

 

(Current
as of October 2021)

 

The
following memorandum briefly summarizes current U.S. federal income tax law. The discussion is intended to be used solely for general
information purposes and does not make specific representations to any participant. A taxpayer’s particular situation may be such
that some variation of the basic rules is applicable to him or her. In addition, the U.S. federal income tax laws and regulations are
revised frequently and may change again in the future. The Corporation undertakes no obligation to update this memorandum. Each participant
is urged to consult a tax advisor, both with respect to U.S. federal income tax consequences as well as any foreign, state or local tax
consequences, before exercising any option or before disposing of any shares of stock acquired under the Plan.

 

Initial
Grant of Options

 

The
grant of an option, whether a nonqualified or nonstatutory stock option (“NSO”) or an incentive stock option (“ISO”),
is not a taxable event for the optionee, and the Corporation obtains no deduction for the grant of the option. Note, however, that under
Section 409A of the Internal Revenue Code, options granted at a discount from fair market value may be considered “deferred compensation”
subject to adverse tax consequences, including immediate income tax upon the vesting of the option (whether or not exercised) and a 20%
tax penalty.

 

Nonqualified
or Nonstatutory Stock Options

 

The
exercise of an NSO is a taxable event to the optionee on the date of exercise. The amount by which the fair market value of the shares
on the date of taxation exceeds the exercise price (the “spread”) will be taxed to the optionee as ordinary income. If the
option was granted to an employee, the spread will also be considered “wages” for purposes of FICA taxes. The Corporation
will be entitled to a deduction in the same amount as the ordinary income recognized by the optionee from the exercise of the option
that is reported to the IRS by the optionee or the Corporation. In general, the optionee’s tax basis in the shares acquired by
exercising an NSO is equal to the fair market value of such shares on the date of taxation. The optionee’s holding period for capital
gains treatment will begin on the date of taxation. Upon a subsequent sale of any such shares in a taxable transaction, the optionee
will realize capital gain or loss (long-term or short-term, depending on whether the required holding period was met before the sale)
in an amount equal to the difference between his or her basis in the shares and the sale price.

 

The
capital gains tax rules are complex. If shares are held for more than one year, the rules for long-term capital gains will apply. The
maximum tax rate on long-term capital gains depends on the taxpayer’s taxable income for the year. A fifteen percent (15%) tax
rate on long-term capital gains applies to taxpayers with taxable income above certain thresholds, which are indexed for inflation (generally
for 2021, $40,400 for single filers, $40,400 for married filing separately, or $80,800 for joint filers). The tax rate on long-term capital
gains is zero percent (0%) for taxable income below these threshold amounts, and the tax rate on long-term capital gains increases to
twenty percent (20%) to the extent that a taxpayer’s income exceeds certain thresholds, which are indexed for inflation (generally,
for 2021, $445,850 for single filers, $250,800 for married filing separately, or $501,600 for joint filers). High income taxpayers are
also subject to an additional tax of 3.8% on some or all of their net investment income, including capital gain income, if their “modified
adjusted gross income” (both earned and investment) exceeds certain thresholds (generally, $200,000 for single filers, $125,000
for married filing separately, or $250,000 for joint filers). Because the rules are complex and can vary in individual circumstances,
each participant should consider consulting his or her own tax advisor.

 

Castellum,
Inc.

Exhibit B to Stock Option Agreement

U.S.
Federal Tax Information

 

    			

     

    

 

If
an optionee exercises an NSO and pays the exercise price with previously acquired shares of stock, special rules apply. The transaction
is treated as a tax-free exchange of the old shares for the same number of new shares, except as described below with respect to shares
acquired pursuant to ISOs. The optionee’s basis in the new shares is the same as his or her basis in the old shares, and the capital
gains holding period runs without interruption from the date when the old shares were acquired. The value of any new shares received
by the optionee in excess of the number of old shares surrendered minus any cash the optionee pays for the new shares will be taxed as
ordinary income. The optionee’s basis in the additional shares is equal to the fair market value of such shares on the date the
shares were transferred, and the capital gain holding period commences on the same date. The effect of these rules is to defer recognition
of any gain in the old shares when those shares are used to buy new shares. Stated differently, these rules allow an optionee to finance
the exercise of an NSO by using shares of stock that he or she already owns, without paying current tax on any unrealized appreciation
in those old shares.

 

Incentive
Stock Options

 

The
holder of an ISO will not for U.S. federal income tax purposes recognize taxable income upon the exercise of the ISO, and the Corporation
will not be entitled to a tax deduction by reason of such exercise, provided that the holder is employed by the Corporation on the exercise
date (or the holder’s employment terminated within the three (3) months preceding the exercise date). Exceptions to this exercise
timing requirement may apply in the event the optionee dies or becomes disabled. The exercise of an option entitled to favorable ISO
tax treatment at the time of exercise may, however, result in liability for the alternative minimum tax, discussed below. An option intended
to be an ISO which is not exercised in compliance with the ISO timing requirements is treated as an NSO for tax purposes. A subsequent
sale of the shares received upon the exercise of an ISO entitled to favorable ISO tax treatment at the time of exercise will result in
the realization of long-term capital gain or loss in the amount of the difference between the amount realized on the sale and the exercise
price for such shares, provided that the sale occurs more than one (1) year after the exercise of the ISO and more than two (2)
years after the grant of the ISO. In general, if a sale or disposition of the shares occurs prior to satisfaction of the foregoing holding
periods (referred to as a “disqualifying disposition”), the optionee will recognize ordinary income at the time of the sale
or disposition in an amount equal to the excess of the fair market value of the shares on the option exercise date of those shares over
the exercise price paid for those shares. If the disqualifying disposition is effected by means of an arm’s length sale or exchange
with an unrelated party, the ordinary income will be limited to the amount by which the amount realized upon the disposition of the shares
or their fair market value on the exercise date, whichever is less, exceeds the exercise price paid for the shares. The amount of an
optionee’s disqualifying disposition income will be reported by the Corporation to the Internal Revenue Service. Any additional
gain recognized upon the disqualifying disposition will be capital gain, which will be long-term if the shares have been held for more
than one (1) year following the exercise date of the option.

 

Favorable
ISO tax treatment is accorded to an optionee at the time of exercise only to the extent that the value of the shares (determined at the
time of grant) covered by an ISO first exercisable in any single calendar year does not exceed one hundred thousand dollars ($100,000).
If ISOs for shares whose aggregate value exceeds one hundred thousand dollars ($100,000) become exercisable in the same calendar year,
the excess will be treated as NSOs.

 

A
special rule applies if an optionee pays all or part of the exercise price of an ISO by surrendering shares of stock that he or she previously
acquired by exercising any other ISO. If the optionee has not held the old shares for the full duration of the applicable holding periods,
then the surrender of such shares to fund the exercise of the new ISO will be treated as a disqualifying disposition of the old shares.
As described above, the result of a disqualifying disposition is the loss of favorable tax treatment with respect to the acquisition
of the old shares pursuant to the previously exercised ISO.

 

Castellum,
Inc.

Exhibit B to Stock Option Agreement

U.S.
Federal Tax Information

 

    			

     

    

 

Where
the applicable holding period requirements have been met, the use of previously acquired shares of stock to pay all or a portion of the
exercise price of an ISO may offer significant tax advantages. In particular, a deferral of the recognition of any appreciation in the
surrendered shares is available in the same manner as discussed above with respect to NSOs.

 

Alternative
Minimum Tax

 

Alternative
minimum tax is paid when such tax exceeds a taxpayer’s regular U.S. federal income tax. Alternative minimum tax is calculated based
on alternative minimum taxable income, which is taxable income for U.S. federal income tax purposes, modified by certain adjustments
and increased by tax preference items.

 

The
“spread” under an ISO—that is, the difference between (a) the fair market value of the shares of stock at exercise
and (b) the exercise price—is classified as alternative minimum taxable income for the year of exercise. Alternative minimum
taxable income may be subject to the alternative minimum tax. However, if the shares of stock purchased upon the exercise of an ISO are
sold in the same taxable year in which alternative minimum taxable income is recognized, then the amount includible in the taxpayer’s
alternative minimum taxable income will not exceed the amount realized upon such sale less the option exercise price paid for those shares,
provided that such disposition is a sale or exchange with respect to which a loss (if sustained) would be recognized to such individual.

 

In
general, when a taxpayer sells stock acquired through the exercise of an ISO, only the difference between the fair market value of the
shares on the date of exercise and the date of sale is used in computing any alternative minimum tax for the year of the sale. The portion
of a taxpayer’s alternative minimum tax attributable to certain items of tax preference (including the alternative minimum taxable
income from an ISO) can be credited against the taxpayer’s regular liability in later years subject to certain limitations.

 

Withholding
Taxes

 

Exercise
of an NSO produces taxable income which, in the case of an option granted to an employee, is subject to income and FICA tax withholding.
The Corporation will not deliver shares to the optionee unless the optionee has agreed to satisfactory arrangements for meeting all applicable
U.S. federal, state and local withholding tax requirements.

 

U.S.
federal tax law does not require unrecognized gain on exercise of an ISO to be treated as “wages” for the purposes of FICA
taxes.

 

THIS
TAX SUMMARY IS GENERAL IN NATURE AND SHOULD NOT BE RELIED UPON BY ANY PERSON IN DECIDING WHETHER OR WHEN TO EXERCISE AN OPTION. EACH
PERSON SHOULD CONSULT HIS OR HER OWN TAX ADVISOR REGARDING THESE MATTERS.

 

Castellum,
Inc.

Exhibit B to Stock Option Agreement

U.S.
Federal Tax InformationExhibit 10.11

 

EMPLOYMENT AGREEMENT

THIS EMPLOYMENT AGREEMENT
(this “Agreement”), dated as of April 1, 2020 (the “Effective Date”), is by and between Castellum,
Inc. (the “Company”), and Mark Fuller (“Employee”).

 

RECITALS

 

A.          The
Company and Employee desire to enter into this Agreement relating to Employee’s employment by the Company.

 

B.           In
addition to the capitalized terms defined elsewhere in this Agreement, capitalized terms used herein shall have the definitions
ascribed thereto in Section 14.

 

AGREEMENTS

 

In consideration of
the mutual covenants of the parties hereto as hereinafter set forth and other good and valuable consideration, the receipt and
sufficiency of which hereby are acknowledged, the parties hereto hereby agree as follows:

 

1.           Employment.
The Company shall employ Employee, and Employee hereby agrees to be employed by the Company, upon the terms and conditions set
forth in this Agreement, for the period beginning on April 1, 2020 and ending on March 31, 2024 (the “Initial Employment
Period”), subject to earlier termination as provided herein. As used herein, the “Employment Period”
means the Initial Employment Period and all Renewal Periods (if any). That certain consulting agreement by and between the Company
and the Employee’s affiliated firm, Trophy Point Ventures, is terminated as of 11:59 p.m. March 31, 2020.

 

2.           Position
and Duties.

 

(a)       Position.
Initially, Employee shall serve as the Chief Executive Office of the Company, reporting to the Board of Directors of the Company.
Upon termination of employment hereunder for any or no reason, Employee will resign from each such position or office and will
sign such documentation as reasonably necessary to effectuate such resignation.

 

(b)       Duties.
During the Employment Period, Employee shall devote Employee’s good faith efforts to the business and affairs of the Company.
During the Employment Period, Employee will (i) perform Employee’s duties faithfully and to the best of Employee’s
abilities and (ii) comply with all of the policies of the Company, including, without limitation, such policies with respect to
legal compliance, conflicts of interest, confidentiality, code of conduct and business ethics as are from time to time in effect
(as the same may be amended or modified from time to time by the Board in its discretion).

 

3.           Termination.
The Employment Period (a) shall automatically terminate upon (i) Employee’s death or (ii) the Board’s reasonable determination
of Employee’s Disability, (b) may be terminated by the Company at any time for any reason or no reason (whether for Cause
or without Cause) by giving Employee written notice of such termination and (c) may be terminated by Employee at any time by giving
the Company written notice of such termination at least fifty (50) days in advance of the Termination Date, unless such notice
is waived in writing by the Company (in which case such termination shall be effective as of the date set forth in such waiver
or such other date designated by the Company). The date that the Employment Period expires or is terminated for any reason (including
by virtue of delivery of an Expiration Notice) is referred to herein as the “Termination Date”.

 

    			 

     

    

 

4.           Base
Salary and Benefits.

 

(a)       Base
Salary; Bonus. During the Employment Period, Employee’s initial base salary shall be $240,000 per year (the “Base
Salary”). The Base Salary may be increased but not decreased in the sole discretion of the Board. The Base Salary shall
be increased as follows:

 

Twenty-Five Thousand Dollars ($25,000)
per month upon the Company reaching an annualized revenue run rate of Twenty-Five Million Dollars ($25,000,000) or greater;

 

Thirty Thousand Dollars ($30,000)
per month upon the Company reaching an annualized revenue run rate of Fifty Million Dollars ($50,000,000) or greater; and

 

Forty Thousand Dollars ($40,000)
per month upon the Company reaching an annualized revenue run rate of Seventy-Five Million ($75,000,000) or greater.

 

The Base Salary shall be payable in regular
installments in accordance with the Company’s general payroll practices. Employee shall be eligible for a bonus as follows:

 

The Company shall pay to the Employee a
cash bonus equal to the lesser of (i) one percent (1% of the trailing twelve (12) month revenues of each company acquired by the
Company during the Term of this Agreement or (ii) four percent (4%) of the trailing twelve (12) month EBITDA of each business acquired
by the Company during the Term of this Agreement, provided that, for a bonus to be due, such acquisition must be accretive to the
Company on both a revenue per share and an EBITDA per share basis. Additionally, the Company shall issue 1 warrant to the Employee
for each $1 of revenue acquired in any such acquisition (e.g. $10mm in revenue = 10 million warrants) with a 7-year term and a
strike price equal to the price used in such acquisition or (if no stock is used) the trailing 30 day moving average closing price
of the Company’s stock.

 

An additional bonus of $50,000 in cash
and 10 million warrants with a 10 cent strike price shall be paid to the Employee upon the Company commencing trading on the Nasdaq
(either tier) or the NYSE (either tier).

 

An additional bonus of $125,000 in cash
and 25 million warrants with a 12 cent strike price shall be paid to the Employee upon the Company joining the Russell 3000 and/or
Russell 2000 stock index (ices).

 

Payment of any bonus shall be conditioned
on the Board determining that there are suitable funds on hand to not risk the financial condition of the Company. Any bonus not
paid immediately shall be accrued and paid when able by the Company in the reasonable judgment of the Board of Directors.

 

    		2	 

     

    

 

(b)       Expenses.
During the Employment Period, the Company will reimburse Employee for all reasonable travel and other expenses incurred by Employee
in connection with the performance of Employee’s duties and obligations under this Agreement. Employee shall comply with
such limitations and reporting requirements with respect to expenses as may be established by the Company from time to time for
its senior executives generally. With respect to any such reimbursements, such reimbursements shall (i) be paid in accordance with
the Company’s normal reimbursement procedures as in effect from time to time, but in no event later than the last day of
the taxable year following the taxable year in which the expense giving rise to such reimbursement was incurred, (ii) for any taxable
year, not affect the expenses eligible for reimbursement in a different taxable year and (iii) not be subject to liquidation or
exchange for other benefits. The Company shall pay to have Employee attend HBS’s program on governance for up to three (3)
weeks and shall pay for membership in Potomac Officers Club and NACD.

 

(c)       Other
Benefits. During the Employment Period, Employee will be entitled to participate in all employee benefit plans or programs
and receive all benefits and perquisites for which salaried employees of the Company generally are eligible under any plan or program
now existing or later established by the Company on a substantially similar basis as other senior executives of the Company and
subject to the terms and conditions set forth in such plans and programs as in effect from time to time including but not limited
to the 401(k) plan with matching, healthcare, and other benefits. Nothing in this Agreement will preclude the Company from amending
or terminating any of the plans or programs applicable to salaried employees or senior executives as long as such amendment or
termination is applicable to all salaried employees or all senior executives, as the case may be. With respect to healthcare, the
Company shall either provide for healthcare coverage for the Employee and Employee’s family (spouse and eligible children
age 26 and younger) or provide a stipend of $4,000 per month at the Employee’s option.

 

(d)       Taxes.
All compensation payable to Employee hereunder shall be subject to all applicable withholding taxes, normal payroll withholding
and any other amounts, if required by law to be withheld.

 

5.           Severance.

 

(a)       Termination without
Cause or for Good Reason. Subject to the terms and conditions of this Section 5, if the Employment Period is terminated
by the Company without Cause or by Employee for Good Reason at any time, Employee shall be entitled to receive, during the Severance
Period, Employee’s Base Salary payable in the same manner and in the same installments as previously paid (the “Severance
Payments”), and, except as set forth in this Section 5(a) or in Section 5(c), the Company’s obligation
to make any other payments or provide any other benefits under this Agreement shall cease as of the Termination Date. When used
herein, the “Severance Period” means the earlier of (x) the period ending on the twelve (12)-month anniversary
of the Termination Date and (y) the date on which the Employment Period would have expired had the Employment Period not been terminated
earlier by the Company without Cause. Employee shall forfeit the compensation and other benefits otherwise payable to Employee
pursuant to this Section 5(a) unless, prior to the date on which the first payment would otherwise be payable pursuant to
this Section 5(a) (and in any event within sixty (60) days after receipt of such Separation Document (as hereinafter defined)),
Employee executes and delivers to the Company (and does not revoke or breach), a complete mutual release in favor of each member
of the Company Group and their affiliates, and their respective equityholders, officers, managers, directors, employees, lenders,
principals and attorneys, in a form reasonably acceptable to the Company (the “Separation Document”); provided,
however, that if the sixty (60)-day period (together with any applicable consideration and revocation periods) begins in one
(1) calendar year and ends in a second calendar year, then regardless of the date on which the Separation Document is actually
executed, the Severance Payments (if owed) will be paid in such second calendar year no later than ten (10) days after the last
day of such sixty (60)-day period (or, if later, upon the expiration of the applicable consideration and revocation periods), subject
to the Company’s ability to accelerate such payments to the extent it would not result in a violation of Code Section 409A.
If Employee breaches or revokes the Separation Document provided pursuant to the previous sentence, then Employee shall promptly
repay to the Company all amounts paid to Employee pursuant to this Section 5(a) prior to such revocation.

 

    		3	 

     

    

 

(b)       Other
Termination. If the Employment Period is terminated (i) as a result of the death of Employee pursuant to Section 3(a)(i),
(ii) by the Company after a determination of a Disability pursuant to Section 3(a)(ii), or (iii) by the Company for Cause
or by Employee (other than for Good Reason), except as set forth in Section 5(c), the Company’s obligation to make
any other payments or provide any other benefits to Employee under this Agreement shall cease as of the Termination Date.

 

(c)       Other
Benefits. Except (i) as required by law, (ii) as specifically provided in this Section 5, (iii) for the payment of earned
but unpaid Base Salary, (iv) for the reimbursement of unreimbursed business expenses pursuant to Section 4(c), and (v) for
the payment of earned but unpaid Performance Bonus for any fiscal year ended prior to the Termination Date, the Company’s
obligation to make any payments or provide any other benefits hereunder shall terminate automatically as of the Termination Date.
All of Employee’s rights to fringe benefits and bonuses hereunder (if any) which would accrue or become payable after the
termination of the Employment Period shall cease upon such termination.

 

(d)       Termination
of Severance. Without limiting the foregoing remedies, if Employee commits a breach of any of the provisions of Sections
6 through 10, the Company shall no longer be obligated to make any payments pursuant to this Section 5, and Employee
shall promptly repay any of such payments made pursuant to this Section 5.

 

(e)       Mitigation.
The Company shall have the right to mitigate and set off against the Severance Payments all amounts Employee earns or receives
as a result of any services Employee renders (in any capacity) for any Person (including self-employment but not including any
earnings from investments of Employee) at any time during the Severance Period. Any such amounts earned or received by Employee
therefrom shall be fairly apportioned over all of the periods during which Employee is performing such services. Employee promptly
shall furnish the Company with verification from the person or entity for which Employee is performing services or granting rights
of the amounts to be earned by or paid to Employee therefor. Employee covenants and agrees that amounts Employee earns during the
Severance Period (i) shall be reached as a result of arm’s length negotiations between such person or entity and Employee,
as applicable, and (ii) shall not be intentionally paid or provided to Employee in intervals that would penalize or prejudice the
Company hereunder.

 

    		4	 

     

    

 

(f)        Offset.
At the time any amount would otherwise become due to Employee pursuant to this Section 5, the Company may, to the extent
permitted by applicable law, offset any amounts Employee owes to any member of the Company Group pursuant to any written agreement,
note or other instrument relating to indebtedness for borrowed money to which Employee is a party or pursuant to any other liability
or obligation by which Employee is bound against any amounts the Company owes Employee hereunder. Any amounts owed to Employee
hereunder that constitute “non-qualified deferred compensation” (within the meaning of Code Section 409A(d)(1)) shall,
to the extent permitted by applicable law, be subject to the offset in this Section 5(f) only if such offset is not taken
until the payment from which such offset is to be taken would otherwise be due to Employee pursuant to this Agreement.

 

(g)       Reversal
of Determination. If matters constituting Cause become known to the Company within fifty (50) days after the Termination Date,
then the Company may, by delivery of written notice to Employee, treat such termination as being with Cause, and Employee shall
promptly, but in any event within five (5) business days following delivery of such notice, return all amounts received by Employee
pursuant to this Agreement that Employee would not have been entitled to receive had the Employment Period been terminated by the
Company for Cause as of the Termination Date.

 

6.           Confidential
Information. Employee acknowledges that the information, observations and data obtained by Employee while associated with any member
of the Company Group (including, without limitation, trade secrets, know-how, research plans, business, accounting, distribution and
sales methods and systems, sales and profit figures and margins and other technical or business information, business, marketing and
sales plans and strategies, cost and pricing structures, and information concerning acquisition opportunities and targets in or reasonably
related to any member of the Company Group’s business or industry) including, in each case, such information, observations and
data obtained prior to the date of this Agreement concerning the business or affairs of any member of the Company Group and its affiliates
(collectively, “Confidential Information”) are the property of such entity and agrees that such entity has a protectable
interest in such Confidential Information. Therefore, Employee agrees that Employee shall not (during the Employment Period or at any
time thereafter) disclose to any unauthorized person or use any such Confidential Information without the prior written consent of the
Board unless and to the extent that the aforementioned matters: (a) become or are generally known to and available for use by the industry
other than as a result of Employee’s acts or omissions in breach of this Agreement, (b) are required to be disclosed by judicial
process or law (provided that Employee shall give prompt advance written notice of such requirement to the Company to enable the Company
to seek an appropriate protective order or confidential treatment) or (c) are in furtherance of Employee’s duties under Section
2(b). Employee shall deliver to the Company at the termination of the Employment Period, or at any other time the Company may request,
all memoranda, notes, plans, records, reports, computer tapes, printouts and software and other documents and data (and copies thereof)
which constitute Confidential Information or Work Product which Employee may then possess or have under Employee’s control. Employee
understands and acknowledges that nothing in this Agreement prohibits or limits Employee or Employee’s counsel from initiating
communications directly with, responding to any inquiry from, volunteering information to, or providing testimony before, the Securities
and Exchange Commission, the Department of Justice, the Financial Industry Regulatory Authority, any other self-regulatory organization
or any other governmental, law enforcement, or regulatory authority, regarding this Agreement and its underlying facts and circumstances,
or any reporting of, investigation into, or proceeding regarding suspected violations of law, and that Employee is not required to advise
or seek permission from the Company before engaging in any such activity. Employee recognizes that, in connection with any such activity,
Employee must inform such authority that the information Employee is providing is confidential. The Company does not waive any applicable
privileges or the right to continue to protect its privileged attorney-client information, attorney work product, and other privileged
information.

 

    		5	 

     

    

 

7.           Inventions
and Patents. Employee hereby assigns to the Company all right, title and interest to all patents and patent applications, all
inventions, innovations, improvements, developments, methods, designs, recipes, formulas, analyses, drawings, reports and all similar
or related information (in each case whether or not patentable), all copyrights and copyrightable works, all trade secrets, confidential
information and know-how, and all other intellectual property rights that both (a) are or were conceived, reduced to practice,
developed or made by Employee while engaged by, employed by, or associated with, any member of the Company Group and (b) either
that (i) relate to the actual or anticipated business, research and development or existing or future products or services of any
member of the Company Group, or (ii) are or were conceived, reduced to practice, developed or made using any of the equipment,
supplies, facilities, assets or resources of any member of the Company Group (including, without limitation, any intellectual property
rights) (“Work Product”), to the extent allowable under applicable law. Employee shall promptly disclose such
Work Product to the Board and perform, at the Company’s expense, all actions reasonably requested by the Board (whether during
or after the Employment Period) to establish and confirm the Company’s ownership thereof (including, without limitation,
assignments, consents, powers of attorney, applications and other instruments).

 

8.           Non-Competition.
In further consideration of the compensation to be paid to Employee hereunder, Employee acknowledges that in the course of Employee’s
employment with the Company, Employee is and will become familiar with trade secrets and other Confidential Information concerning
the Company Group and that Employee’s services will be of special, unique and extraordinary value to the Company Group. Therefore,
Employee hereby covenants and agrees that, during the Employment Period and for six (6) months after the Termination Date (the
“Restricted Period”), Employee shall not, without prior express written approval by the Board, directly or indirectly
through any other Person or Persons (whether for compensation or otherwise):

 

(a)       own
or hold any debt or equity interest in, manage, operate, control, consult with, render services for, or engage, join or participate
in the ownership, management, operation or control of, or furnish any capital or loans to, any Person engaged in or actively pursuing
the Business (a “Competing Business”), either as an owner, officer, general or limited partner, principal, proprietor,
joint venturer, shareholder, director, member, manager, investor, lender, agent, employee, consultant, trustee, affiliate or otherwise;
or

 

    		6	 

     

    

 

(b)       provide
to any Competing Business (whether as owner, officer, general or limited partner, principal, proprietor, joint venturer, shareholder,
director, member, manager, investor, agent, employee, consultant, trustee, affiliate or otherwise) any executive, managerial, strategic
or business development services similar to those services that Employee provided to any member of the Company Group during Employee’s
employment with the Company.

 

Employee acknowledges and agrees that the
provisions in this Section 8 shall operate throughout the United States, Canada, and any NATO country. Nothing herein shall
prohibit Employee from being a passive owner of not more than one percent (1%) of the outstanding securities of any publicly traded
company engaged in a Competing Business, so long as Employee has no active participation in such Competing Business. In addition,
Employee agrees and acknowledges that the potential harm to any member of the Company Group of its non-enforcement outweighs any
harm to Employee of its enforcement by injunction or otherwise. Employee acknowledges that Employee has carefully read this Agreement
and has given careful consideration to the restraints imposed upon Employee by this Agreement, and is in full accord as to their
necessity. Employee expressly acknowledges and agrees that each and every restraint imposed by this Agreement is reasonable with
respect to the subject matter, time period and geographical area and that this Section 8 is ancillary to the sale of the Company
from Employee to BioNovelus, Inc.

 

9.           Non-Interference.
Employee agrees that, during the Restricted Period and for one (1)-year thereafter, Employee will not, directly or indirectly:

 

(a)       solicit
(or participate as an employee, agent, consultant, owner, lender, securityholder, director, manager, partner, member or in any
other individual or representative capacity in any business which solicits) business from any Person that is or was a customer,
client, distributor, supplier or vendor of any member of the Company Group during the two (2)- year period preceding the date of
such solicitation, or from any successor in interest to any such Person, in each case, for the purpose of securing business or
contracts related to the Business or any portion thereof; or

 

(b)       employ,
engage or recruit, solicit, contact or approach for employment or engagement (or participate as an employee, agent, consultant,
owner, lender, securityholder, director, manager, partner, member or in any other individual or representative capacity in any
business that employs, engages or recruits, solicits, contacts or approaches for employment or engagement) any Person that served
as an employee, independent contractor or consultant of any member of the Company Group within the two (2) years immediately preceding
such action, or otherwise seek or attempt to influence or alter any such Person’s relationship with any member of the Company
Group.

 

    		7	 

     

    

 

10.         Non-disparagement.
During the Employment Period or at any time thereafter, Employee shall not, directly or indirectly: (i) make any oral or written
statement (including via the internet or social media) that disparages or places any member of the Company Group (including any
of its past or present officers, employees, products or services) in a false or negative light or otherwise induce or attempt to
induce any Person to cease doing business with any member of the Company Group, reduce its business or not increase its business
with any member of the Company Group, not grant new business to any member of the Company Group, or in any way interfere with the
relationship between such Person and any member of the Company Group, or (ii) encourage or assist any Person who may or who has
filed a lawsuit, charge, claim or complaint against any member of the Company Group; provided, however, that nothing herein
shall prevent Employee from responding to a lawful subpoena or complying with any other legal obligation, in each case, to the
extent required by law. If Employee receives any subpoena or becomes subject to any legal obligation that implicates this Section
10, Employee will provide prompt written notice of that fact to the relevant members of the Company Group (as set forth in
Section 15) and enclose a copy of the subpoena and any other documents describing the legal obligation. Section 10(i)
shall not apply to communications between Employee and his immediate family so long as Employee’s immediate family keeps
such communications strictly confidential.

 

11.         Enforcement.
If, at the time of enforcement of any of Sections 6 through 10, a court or an arbitrator holds that the duration,
scope or area restrictions stated therein are unreasonable under the circumstances then-existing, the parties hereto agree that
the maximum duration, scope or area reasonable under such circumstances shall be substituted for the stated duration, scope or
area and that the court or arbitrator shall be allowed to revise the restrictions contained herein to cover the maximum period,
scope and area permitted by law. Because Employee’s services are unique and because Employee has access to Confidential Information
and Work Product, the parties hereto agree that money damages would not be an adequate remedy for any breach of this Agreement.
Therefore, in the event of a breach or threatened breach of this Agreement, the Company or its successors or assigns may, in addition
to other rights and remedies existing in their favor, apply to any court of competent jurisdiction for and obtain specific performance
and/or injunctive or other relief in order to enforce or prevent any violations of the provisions hereof (without (i) the posting
of any bond or other security, (ii) the necessity of showing actual damages and (iii) the necessity of showing that monetary damages
are an inadequate remedy). Employee agrees that the restrictions contained in Sections 6 through 10 are reasonable.

 

12.         Employee’s
Representations. Employee hereby represents and warrants to the Company that (i) the execution, delivery and performance of
this Agreement by Employee and the execution of the Company’s business plan by Employee do not and shall not conflict with,
breach, violate or cause a default under any contract, agreement, instrument, order, judgment or decree to which Employee is a
party or by which Employee is bound, (ii) Employee is not a party to or bound by any employment agreement, noncompete agreement,
nonsolicitation agreement or confidentiality agreement with any other person or entity, (iii) Employee shall not use any confidential
information or trade secrets of any third party in connection with the performance of Employee’s duties hereunder and (iv)
this Agreement constitutes the valid and binding obligation of Employee, enforceable against Employee in accordance with its terms.
Employee hereby acknowledges and represents that Employee has consulted with independent legal counsel regarding Employee’s
rights and obligations under this Agreement and that Employee fully understands the terms and conditions contained herein.

 

    		8	 

     

    

 

13.         Survival.
Sections 5 through 12 shall survive and continue in full force in accordance with their terms notwithstanding any
termination of the Employment Period.

 

14.         Definitions.

 

“Board” means
the Board of Directors of Castellum, Inc.

 

“Business”
means (i) the business of providing IT, cybersecurity, and related products and services to the U.S. commercial market and the
United States government and governments of NATO countries as a “government contractor,” (ii) any other material business
conducted by the Company at any time during the Employment Period or (iii) any business that the Company has entered into a letter
of intent or agreement at any time during the Employment Period to commence or acquire.

 

“Cause” shall
include the following:

 

(a)       The
commission by Employee of a felony (or procedural equivalent) or any other crime involving moral turpitude or any act or omission
that would constitute a breach of a fiduciary duty of an officer of a Nevada corporation, in each case, as determined in good faith
by the Board;

 

(b)       The
commission of an act of intentional dishonesty, fraud, embezzlement, gross negligence, willful misconduct or theft with respect
to any member of the Company or any of their respective customers or other business relationships;

 

(c)       Any
material breach, non-performance or non-observance by Employee of any of the terms of this Agreement (other than a breach, non-performance
or non-observance described in clause (d) of this definition), the governing documents of the Company or any other agreement between
Employee, on the one hand, and the Company, on the other hand, in Employee’s capacity as an equityholder, independent contractor,
employee or officer thereof, which failure or breach (if curable) continues for a period of at least ten (10) days following a
written demand for such performance by the Board specifying in reasonable detail the action that the Board alleges to be a failure
to perform or breach by Employee;

 

(d)       Any
breach of any of the provisions of Sections 6 through 10;

 

(e)       The
commission by Employee of (i) alcohol abuse that interferes with Employee’s performance of Employee’s duties hereunder
or illegal drug use by Employee, (ii) any act or omission that constitutes a violation of any law, regulation or ordinance applicable
to the Company or the Business or would, if proven, cause the loss of Employee’s security clearance with the United States
government, or (iii) any breach of any fiduciary duties owed to any member of the Company;

 

(f)       Employee’s
(i) knowingly taking any action of material importance on behalf of the Company or any of its affiliates without appropriate authority
to take such action or (ii) material misrepresentation to or willfully withholding from the Board of information that is material
to any member of the Company, its businesses or operations;

 

    		9	 

     

    

 

(g)       The
violation by Employee of any of the material written policies or procedures of any member of the Company applicable to Employee,
or any other act or omission constituting gross negligence or willful or criminal misconduct with respect to Employee’s duties
or obligations to any member of the Company which violation is adverse to such member and which violation or conduct (if curable)
continues for a period of at least ten (10) days following written notice thereof to Employee from the Board specifying in reasonable
detail the violations, actions or omissions that the Board alleges to have occurred;

 

(h)       Employee’s
insubordination or refusal to perform specific lawful directives from the Board that are reasonably consistent with the scope and
nature of Employee’s responsibilities; or

 

(i)       The
existence of any legal or contractual limitation on Employee’s ability to engage in the Business that reasonably could be
expected to have a material adverse effect on Employee’s ability to attract or retain customers or perform services hereunder.

 

“CEO” means
the Chief Executive Officer of the Company.

 

“Code” means
the Internal Revenue Code of 1986, as amended.

 

“Company” means
Castellum, Inc. and any Subsidiaries or affiliates.

 

“Disability”
means Employee’s inability to fulfill Employee’s duties under this Agreement for sixty (60) consecutive days or ninety
(90) days in any one hundred eighty (180)- day period due to a mental or physical illness, as reasonably determined by the Board.

 

“Good Reason”
means:

 

(a)       the
relocation of Employee’s principal office more than fifty (50) miles from Washington, DC, unless such new office is within
50 miles from Employee’s then- permanent residence; or

 

(b)       a
material breach of this Agreement by the Company.

 

Employee may terminate
his employment for Good Reason only by giving the Board prior written notice of termination for Good Reason within 30 days after
Employee first becomes aware of the event or condition first giving rise to such Good Reason, and such notice shall become effective
thirty (30) days after the date of the notice, unless the Company cures the circumstances that constitute Good Reason within thirty
(30) days following the date of the notice, in which case the notice will be of no further effect.

 

“Person”
means any individual, sole proprietorship, general partnership, limited partnership, limited liability company, joint venture,
trust, unincorporated association, corporation, entity or government (whether federal, state, county, city or otherwise, including,
without limitation, any instrumentality, division, agency or department thereof).

 

    		10	 

     

    

  

“Subsidiary”
means, with respect to any Person, any corporation, limited liability company, partnership, association or business entity of which
(i) if a corporation, a majority of the total voting power of shares of stock entitled (without regard to the occurrence of any
contingency) to vote in the election of directors, managers, or trustees thereof is at the time owned or controlled, directly or
indirectly, by that Person or one or more of the other Subsidiaries of that Person or a combination thereof, or (ii) if a limited
liability company, partnership, association, or other business entity (other than a corporation), a majority of partnership or
other similar ownership interest thereof is at the time owned or controlled, directly or indirectly, by that Person or one or more
Subsidiaries of that Person or a combination thereof. For purposes hereof, a Person or Persons shall be deemed to have a majority
ownership interest in a limited liability company, partnership, association or other business entity (other than a corporation)
if such Person or Persons shall be allocated a majority of limited liability company, partnership, association, or other business
entity gains or losses or shall be or control any manager, managing director or general partner of such limited liability company,
partnership, association or other business entity. Notwithstanding the foregoing, for purposes hereof, any Person which is consolidated
with the Company in its financial statements prepared in accordance with U.S. generally accepted accounting principles, consistently
applied, shall be deemed to be a Subsidiary of the Company and any indirect subsidiary of a Person shall be deemed to be a Subsidiary
of such Person. For purposes hereof, references to a “Subsidiary” of any Person shall be given effect only at such
times that such Person has one or more Subsidiaries.

 

15.         Notices.
Any notice provided for in this Agreement must be in writing and must be either (a) personally delivered, (b) delivered by a recognized
overnight courier service (charges prepaid) or (c) by email, with receipt acknowledged, to the recipient at the address below indicated:

 

If to the Company:

 

Castellum, Inc.

Attention: Board of Directors

9812 Falls Road, #114-299

Potomac, MD 20854

 

If to Employee:

 

Mark Fuller

See signature page hereto

 

or such other address or to the attention
of such other person as the recipient party shall have specified by prior written notice to the sending party. Date of service
of such notice shall be (x) the date such notice is personally delivered, (y) one (1) business day after date of delivery to the
overnight courier if sent by overnight courier or (z) the date such notice is delivered by email, receipt confirmed by recipient.

 

    		11	 

     

    

 

16.         General
Provisions.

 

(a)       Severability.
Except as provided in Section 11, whenever possible, each provision of this Agreement shall be interpreted in such manner
as to be effective and valid under applicable law, but if any provision of this Agreement is held to be illegal, invalid or unenforceable
in any respect under any present or future law, and if the rights or obligations of any party hereto under this Agreement will
not be materially and adversely affected thereby, (i) such provision will be fully severable, (ii) this Agreement will be construed
and enforced as if such illegal, invalid or unenforceable provision had never comprised a part hereof, (iii) the remaining provisions
of this Agreement will remain in full force and effect and will not be affected by the illegal, invalid or unenforceable provision
or by its severance herefrom and (iv) in lieu of such illegal, invalid or unenforceable provision, there will be added automatically
as a part of this Agreement a legal, valid and enforceable provision as similar in terms to such illegal, invalid or unenforceable
provision as may be possible.

 

(b)       Complete
Agreement. This Agreement and those documents expressly referred to herein embody the complete agreement and understanding
among the parties hereto and supersede and preempt any prior understandings, agreements or representations by or among the parties,
written or oral, which may have been related to the subject matter hereof in any way.

 

(c)       Counterparts;
Electronic Transmission. This Agreement may be executed in separate counterparts, each of which is deemed to be an original
and all of which taken together constitute one and the same agreement. Delivery of executed signature pages hereof by electronic
transmission (including a facsimile or .pdf file) shall constitute effective and binding execution and delivery of this Agreement.

 

(d)       Amendment
and Waiver. The provisions of this Agreement may be amended and waived only with the prior written consent of each of the Company
and Employee.

 

(e)       Business
Days. If any time period for giving notice or taking action hereunder expires on a day which is a Saturday, Sunday or legal
holiday in the state in which the Company’s chief executive office is located, the time period shall be automatically extended
to the business day immediately following such Saturday, Sunday or holiday.

 

(f)       No
Strict Construction. The language used in this Agreement shall be deemed to be the language chosen by the parties hereto to
express their mutual intent, and no rule of strict construction shall be applied against any party.

 

(g)       Assignment.
Except as otherwise provided herein, this Agreement shall bind and inure to the benefit of and be enforceable by Employee, the
Company and their respective successors and assigns; provided, however, that the rights and obligations of Employee under
this Agreement shall not be assignable other than to (a) any affiliate of the Company Group or (b) any purchaser of all or substantially
all of the assets of any member of the Company Group.

 

(h)       Governing
Law. This Agreement shall be construed in accordance with the internal laws, but not the law of conflicts, of the State of
Maryland.

 

    		12	 

     

    

 

(i)       Arbitration.
Except as expressly provided otherwise in this Agreement, in the event of any controversy between the parties hereto arising out
of, or relating to, this Agreement, including, without limitation, any controversy concerning the negotiation, validity or enforceability
of this Agreement and any dispute as to whether a particular controversy is subject to arbitration, which cannot be settled amicably
by the parties hereto, such controversy or dispute shall be finally, exclusively and conclusively settled by mandatory arbitration
conducted expeditiously in accordance with the JAMS Comprehensive Arbitration Rules, by a panel of three (3) arbitrators; provided
that, notwithstanding the foregoing, each of the parties hereto shall be entitled to seek a temporary restraining order and any
other emergency injunctive relief, from a court of competent jurisdiction, restraining the other party from committing or continuing
any violation of the provisions hereof until such time as the controversy is adjudicated in arbitration; provided further, that
monetary damages for any breach of this Agreement shall be determined pursuant to this subsection. If the parties hereto are unable
to agree on the selection of an arbitration panel, then the arbitration panel shall be appointed by JAMS according to its rules
on arbitrator selection, which appointment shall be made within ten (10) days of JAMS’ receipt of notice from a party that
the parties are unable to agree on an arbitration panel. Any party hereto may institute such arbitration proceeding by filing the
required documents with the arbitration service and giving written notice to the other party hereto. A hearing shall be held by
the arbitrator at JAMS’ facilities located in Washington, DC within thirty (30) days of the arbitration panel’s appointment.
The decision of the arbitrators shall be final and binding upon all parties and shall be rendered pursuant to a written decision
which contains a detailed recital of the arbitrators’ reasoning. Judgment upon the award rendered may be entered in any court
having jurisdiction thereof pursuant to the Federal Arbitration Act, 9 U.S.C. Sec. 1, et seq.

 

[Signature Page Follows]

 

    		13	 

     

    

 

IN WITNESS WHEREOF, the parties hereto
have executed this Employment Agreement as of the date first written above.

 

	 	COMPANY:
	 	 
	 	CASTELLUM, INC.
	 	 	 
	 	By:	/s/ Jay O. Wright
	 	 
	 	EMPLOYEE:
	 	 
	 	/s/ Mark Fuller
	 	Mark Fuller
	 	Address: 9722 Meyer Point Drive, Potomac, MD 20854

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