Document:

Second Amendment, dated May 12, 2011, by and among the registrant

 Exhibit 10.1 
 SECOND AMENDMENT 
 This Second Amendment (this “Amendment”) to
the Credit Agreement referred to below is dated as of May 12, 2011, by and among MANTECH INTERNATIONAL CORPORATION, a Delaware corporation, in its capacity as Borrower under the Credit Agreement referred to below (the
“Borrower”), the Lenders party hereto (the “Consenting Lenders”) pursuant to an authorization (in the form attached hereto as Exhibit A, each a “Lender Authorization”), and BANK OF AMERICA, N.A., as
administrative agent (the “Administrative Agent”) for the Lenders party to the Credit Agreement referred to below. 
 STATEMENT OF PURPOSE: 
 The Borrower, the Lenders, certain other financial
institutions and the Administrative Agent are parties to the Credit Agreement dated as of April 30, 2007 (as amended by that certain First Amendment and Consent dated as of December 18, 2009 and as may be further amended, restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”). 
 The Borrower has requested
that the Administrative Agent and the Lenders agree to amend the Credit Agreement as more specifically set forth herein. Subject to the terms and conditions set forth herein, the Administrative Agent and each of the Consenting Lenders have agreed to
grant such request of the Borrower. 
 NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, the parties hereto hereby agree as follows: 
 1. Capitalized Terms. All capitalized terms not
otherwise defined herein (including, without limitation, in the introductory paragraph and the statement of purpose hereto) shall have the meanings assigned thereto in the Credit Agreement (as amended by this Amendment). 

2. Credit Agreement Amendment. Section 7.06(e) of the Credit Agreement is hereby amended and restated in its entirety
to read as follows: 
 “(e) the Borrower may (i) make Restricted Payments to any Person that owns an
Equity Interest in the Borrower, ratably according to such Person’s holdings of the type of Equity Interest in respect of which such Restricted Payment is being made (unless otherwise agreed by all of the owners of a particular class of Equity
Interests and provided that any such agreement by any class does not have an adverse effect with respect to any other class of Equity Interests) or (ii) repurchase its Equity Interests pursuant to a stock repurchase plan approved by the
Borrower’s board of directors, all such repurchases of Equity Interests pursuant to clause (ii) together with all such Restricted Payments made pursuant to clause (i) in an aggregate amount not to exceed $80,000,000 in any fiscal
year, so long as each of the following conditions is satisfied: 
 (i) no Event of Default shall have occurred and be
continuing; 
 (ii) the Borrower demonstrates (to the satisfaction of the Administrative Agent) compliance with the financial
covenants set forth in Section 7.12 both before and after giving pro forma effect to the following transactions; 

(iii) immediately after giving effect to such purchase or acquisition, (A) the Consolidated Leverage Ratio of the Borrower and its
Subsidiaries shall not be greater than 2.75 to 1.00 and (B) the Consolidated Fixed Charge Coverage Ratio 

 
of the Borrower and its Subsidiaries shall not be less than 1.20 to 1.00, in each case, such compliance to be determined on the basis of the financial information most recently delivered to the
Administrative Agent and the Lenders pursuant to Section 6.01(a) or (b) as though such purchase or other acquisition had been consummated as of the first day of the fiscal period covered thereby; and 

(iv) immediately after giving effect to such purchase or acquisition (including, without limitation, the funding of any Loans in
connection therewith), the Aggregate Commitments shall exceed the Total Outstandings by at least $50,000,000; and” 
 3.
Conditions to Effectiveness. Upon the satisfaction of each of the following conditions, this Amendment shall be deemed to be effective as of the date hereof: 

(a) the Administrative Agent shall have received counterparts of this Amendment executed by the Administrative Agent (on
behalf of itself and each of the Consenting Lenders by virtue of each Consenting Lender’s execution of a Lender Authorization) and the Borrower; 
 (b) the Administrative Agent shall have received executed Lender Authorizations from the Consenting Lenders constituting Required Lenders; and 

(c) the Administrative Agent shall have received such other instruments, documents and certificates as the Administrative
Agent shall reasonably request in connection with the execution of this Amendment. 
 4. Effect of the Amendment. Except
as expressly provided herein, the Credit Agreement and the other Loan Documents shall remain unmodified and in full force and effect. Except as expressly set forth herein, this Amendment shall not be deemed (a) to be a waiver of, or consent to,
a modification or amendment of, any other term or condition of the Credit Agreement or any other Loan Document, (b) to prejudice any other right or rights which the Administrative Agent or the Lenders may now have or may have in the future
under or in connection with the Credit Agreement or the other Loan Documents or any of the instruments or agreements referred to therein, as the same may be amended, restated, supplemented or otherwise modified from time to time, (c) to be a
commitment or any other undertaking or expression of any willingness to engage in any further discussion with the Borrower or any other Person with respect to any waiver, amendment, modification or any other change to the Credit Agreement or the
Loan Documents or any rights or remedies arising in favor of the Lenders or the Administrative Agent, or any of them, under or with respect to any such documents or (d) to be a waiver of, or consent to or a modification or amendment of, any
other term or condition of any other agreement by and among the Borrower, on the one hand, and the Administrative Agent or any other Lender, on the other hand. References in the Credit Agreement to “this Agreement” (and indirect references
such as “hereunder”, “hereby”, “herein”, and “hereof”) and in any Loan Document to the Credit Agreement shall be deemed to be references to the Credit Agreement as modified hereby. 

5. Representations and Warranties/No Default. By their execution hereof, 

(a) the Borrower hereby certifies, represents and warrants to the Administrative Agent and the Lenders that after giving
effect to the amendment set forth in Section 2 above, each of the representations and warranties set forth in the Credit Agreement and the other Loan Documents is true and correct in all material respects (unless such representation and
warranty is subject to a materiality qualifier in which case it must be true and correct in all respects) as of the date hereof (except to the extent such representations and warranties expressly refer to an earlier

  
 2 

 
date, in which case they shall be true and correct in all material respects (unless such representation and warranty is subject to a materiality qualifier in which case it must be true and
correct in all respects) as of the earlier date) and that no Default or Event of Default has occurred or is continuing under the Credit Agreement; and 
 (b) the Borrower hereby certifies, represents and warrants to the Administrative Agent and the Lenders that: 
 (i) it has the right, power and authority and has taken all necessary corporate and other action to authorize the execution, delivery and performance of this Amendment and each of the other documents
executed in connection herewith to which it is a party in accordance with their respective terms and the transactions contemplated hereby; and 
 (ii) this Amendment and each other document executed in connection herewith has been duly executed and delivered by the duly authorized officers of the Borrower, and each such document constitutes the
legal, valid and binding obligation of the Borrower, enforceable in accordance with its terms, except as may be limited by bankruptcy, insolvency, reorganization, moratorium or similar state or federal debtor relief laws from time to time in effect
which affect the enforcement of creditors’ rights in general and the availability of equitable remedies. 
 6.
Reaffirmations. The Borrower (a) agrees that the transactions contemplated by this Amendment shall not limit or diminish the obligations of the Borrower under, or release the Borrower from any obligations under the Guaranty Agreement,
the Collateral Agreement and each other Security Document to which it is a party, (b) confirms and reaffirms its obligations under the Guaranty Agreement, the Collateral Agreement and each other Security Document to which it is a party and
(c) agrees that the Guaranty Agreement, the Collateral Agreement and each other Security Document to which it is a party remain in full force and effect and are hereby ratified and confirmed. In furtherance of the reaffirmations set forth in
this Section 6 the Borrower hereby grants to the Administrative Agent, for the ratable benefit of the Secured Parties, a security interest in, all Collateral and all proceeds thereof as security for the Obligations, in each case subject
to any applicable terms and conditions set forth in the Guaranty Agreement, the Collateral Agreement and each other Security Document to which it is a party. 
 7. Governing Law. THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REFERENCE TO THE CONFLICTS OF LAW PRINCIPLES THEREOF. 

8. Counterparts. This Amendment may be executed by one or more of the parties hereto in any number of separate counterparts and
all of said counterparts taken together shall be deemed to constitute one and the same instrument. 
 9. Electronic
Transmission. A facsimile, telecopy, pdf or other reproduction of this Amendment may be executed by one or more parties hereto, and an executed copy of this Amendment may be delivered by one or more parties hereto by facsimile or similar
instantaneous electronic transmission device pursuant to which the signature of or on behalf of such party can be seen, and such execution and delivery shall be considered valid, binding and effective for all purposes. At the request of any party
hereto, all parties hereto agree to execute an original of this Amendment as well as any facsimile, telecopy, pdf or other reproduction hereof. 
 [Signature Pages Follow] 

  
 3 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of
the date and year first above written. 
  

					
	BORROWER:
	
	MANTECH INTERNATIONAL CORPORATION
		
	By:	 	 /s/ Kevin M. Phillips

		 	Name:	 	Kevin M. Phillips
		 	Title:	 	Executive Vice President and
		 		 	Chief Financial Officer

 
					
	BANK OF AMERICA, N.A., as Administrative Agent (on behalf of itself and the Consenting Lenders who have executed a Lender Authorization) and as L/C Issuer and a
Lender
		
	By:	 	 /s/ Jim Langley

		 	Name:	 	Jim Langley
		 	Title:	 	Vice PresidentManagement Incentive Plan of ManTech International Corporation 2011 Restatement

 Exhibit 10.2 
 MANAGEMENT INCENTIVE PLAN OF 
 MANTECH INTERNATIONAL CORPORATION

 2011 RESTATEMENT 
 SECTION I—PURPOSE OF PLAN 
 The purpose of this Management Incentive
Plan (this “Plan”) of ManTech International Corporation, a Delaware corporation (“ManTech”), is to enable ManTech and its subsidiaries and affiliates (the “Company”) to attract, retain and motivate its directors,
officers and other senior management and technical personnel and to further align the interests of such persons with those of the stockholders of ManTech by providing for or increasing the proprietary interest of such persons in ManTech. 

SECTION II—ADMINISTRATION OF PLAN 
 2.1 Composition of Committee. This Plan shall be administered by the Compensation Committee of ManTech’s Board of Directors (the “Committee”), as appointed from time to time by
the Board of Directors (the “Board”). The Board, in its sole discretion, may exercise any authority of the Committee under this Plan in lieu of the Committee’s exercise thereof and in such instances references herein to the Committee
shall refer to the Board. Unless otherwise provided by the Board: 
 (a) with respect to any Award that the
Committee intends to be exempted by Rule 16b-3(d)(1) or (e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Committee shall consist of two or more directors each of whom is a “non-employee
director” (as such term is defined in Rule 16b-3 promulgated under the Exchange Act, as such Rule may be amended from time to time), 
 (b) with respect to any Award that the Committee intends to qualify as “performance-based compensation” under Section 162(m) of the Internal Revenue Code of 1986, as amended (the
“Code”), the Committee shall consist of two or more directors, each of whom is an “outside director” (as such term is defined under Code Section 162(m)), and 

(c) with respect to any other Award, the Committee may appoint one or more separate committees (any such committee, a
“Subcommittee”) composed of one or more directors of ManTech (who may but need not be members of the Committee) or to the extent permitted under Delaware law, officers of ManTech, and may delegate to any such Subcommittee(s) the authority
to grant Awards under this Plan to Eligible Persons, to determine all terms of such Awards, and/or to administer this Plan or any aspect of it. Any action by any such Subcommittee within the scope of such delegation shall be deemed for all purposes
to have been taken by the Committee. 
 The Committee may designate the Secretary of ManTech or other Company employees to
assist the Committee in the administration of this Plan, and may grant authority to such persons to execute agreements or other documents evidencing Awards made under this Plan or other documents entered into under this Plan on behalf of the
Committee or ManTech, to make determinations under this Plan or Awards and to interpret the terms of the Plan and Awards. Any such action by any such person(s) within the scope of such delegation shall be deemed for all purposes to have been taken
or made by the Committee. 
 2.2 Powers of the Committee. Subject to the express provisions and limitations set
forth in this Plan, the Committee shall be authorized and empowered to do all things necessary or desirable, in its sole discretion, in connection with the administration of this Plan, including, without limitation, the following: 

(a) to prescribe, amend and rescind rules and regulations relating to this Plan and to define terms not otherwise defined
herein; provided that, unless the Committee shall specify otherwise, for purposes of this Plan (i) the term “fair market value” shall mean, as of any date, the closing price for a Share (as defined in Section 3.1) reported on
Nasdaq Stock Market (or such other stock exchange or quotation system on which Shares are then listed or quoted) for such date (or, if such date is not a business day, the most recent business day immediately preceding such date); and (ii) the
term “Company” shall mean ManTech and its subsidiaries and affiliates, unless the context otherwise requires; 

 (b) to determine which persons are Eligible Persons (as defined in
Section 4), to which of such Eligible Persons, if any, Awards shall be granted hereunder and the timing of any such Awards; 
 (c) to grant Awards to Eligible Persons and determine the terms and conditions thereof, including the number of Shares subject to Awards and the exercise or purchase price of such Shares and the
circumstances under which Awards become exercisable or vested or are forfeited or expire, which terms may but need not be conditioned upon the passage of time, continued service as a director or an employee, the satisfaction of performance criteria,
the occurrence of certain events (including events which the Board or the Committee determine constitute a change of control), or other factors; 
 (d) to establish, verify the extent of satisfaction of, adjust, reduce or waive any performance goals or other conditions applicable to the grant, issuance, exercisability, vesting and/or ability to
retain any Award; 
 (e) to prescribe and amend the terms of the agreements or other documents evidencing Awards
made under this Plan (which need not be identical), provided that the power to amend does not extend to any amendment which would cause an award to fail to meet the requirements of Code Section 409A; 

(f) to determine whether, and the extent to which, adjustments are required pursuant to Section 11 and
Section 12; 
 (g) to interpret and construe this Plan, any rules and regulations under this Plan and the
terms and conditions of any Award granted hereunder, and to make exceptions to any such provisions in good faith and for the benefit of the Company; 
 (h) to the extent allowed by applicable laws, rules and regulations, to delegate to designated executive officers the power and authority to determine the terms of and to grant awards under this plan to
the Company’s non-executive officers; and 
 (i) to make all other determinations deemed necessary or
advisable for the administration of this Plan. 
 2.3 Determinations of the Committee. All decisions, determinations
and interpretations by the Committee regarding this Plan shall be final and binding on all Eligible Persons and Participants. The Committee shall consider such factors as it deems relevant to making such decisions, determinations and interpretations
including, without limitation, the recommendations or advice of any director, officer or employee of the Company and such attorneys, consultants and accountants as it may select. 

SECTION III—STOCK SUBJECT TO PLAN 
 3.1 Aggregate Limits. The base number of shares of ManTech’s Class A Common Stock, $.01 par value (“Shares”) reserved for issuance under the 2006 restatement of the Plan
was four million five hundred thousand (4,500,000) Shares, which is being increased by one million five hundred thousand (1,500,000) Shares so that the base number of Shares reserved for issuance over the term of the Plan shall not exceed
six million (6,000,000) shares. In addition, the number of Shares available for issuance under the Plan has been and will continue to be automatically increased on the first trading day of January each

 
calendar year during the term of the Plan by an amount equal to one and one-half percent (1.5%) of the total number of Shares outstanding (including all outstanding classes of common stock)
on the last trading day in December of the immediately preceding calendar year, but in no event shall any such annual increase exceed one million five hundred thousand (1,500,000) Shares. The aggregate number of Shares available for issuance
under this Plan and the number of Shares subject to outstanding Options or other Awards shall be subject to adjustment as provided in Section 11.2. The Shares issued pursuant to this Plan may be Shares that previously were issued by ManTech,
including Shares purchased in the open market, or authorized but unissued Shares. 
 3.2 Tax Code Limits. The
aggregate number of Shares issuable under all Awards granted under this Plan during any calendar year to any one Eligible Person shall not exceed 1,000,000. Notwithstanding anything to the contrary in this Plan, the foregoing limitations shall be
subject to adjustment under Section 11 and Section 12, but only to the extent that such adjustment will not affect the status of any Award intended to qualify as “performance-based compensation” under Code Section 162(m).
The foregoing limitations shall not apply to the extent that they are no longer required in order for compensation in connection with grants under this Plan to be treated as “performance-based compensation” under Code Section 162(m).
All Shares available for issuance under this Plan may be subject to Options which intend to qualify as Incentive Stock Options (“ISOs”) pursuant to Code Section 422. However, subject to adjustment pursuant to Section 11 and
Section 12, the aggregate number of ISOs available for issuance shall not exceed 6,000,000. 
 3.3 Issuance of
Shares. For purposes of Section 3.1, the aggregate number of Shares issued under this Plan at any time shall equal only the number of Shares actually issued upon exercise or settlement of an Award and shall not include Shares subject
to Awards that have been canceled, expired, forfeited or settled in cash or Shares subject to Awards that have been delivered (either actually or constructively by attestation) to or retained by the Company in payment or satisfaction of the purchase
price, exercise price or tax withholding obligation of an Award. 
 SECTION IV—PERSONS ELIGIBLE UNDER PLAN

 4.1 Eligible Employees and Participants. Any person who is a director, an employee or a prospective employee
of the Company or of any of its subsidiaries or affiliates shall be eligible to be considered for the grant of Awards hereunder (an “Eligible Person”). Unless provided otherwise by the Committee, the term “employee” shall mean an
“employee” as such term is defined in General Instruction A to Form S-8 under the Securities Act of 1933, as amended. A “Participant” is any current or former Eligible Person to whom an Award has been made and any person
(including any estate) to whom an Award has been assigned or transferred pursuant to Section 10.1. 
 4.2 Less Than Full
Time Employment. The Committee shall have the right to determine the effect, if any, on the vesting, exercisability, retention and/or forfeiture of an Award as a result of any decreased level of employment during any period in which a
Participant is on an approved leave of absence or is employed on a less than full time basis, and the Committee may take into consideration any accounting consequences to the Company in making any such adjustment. 

4.3 Termination of Employment. For purposes of this Plan, “termination of employment” shall mean ceasing to serve
as a full time employee or as a director of the Company, except that an approved leave of absence, or approved employment on a less than full time basis, or continuing to provide services as an independent contractor following termination of
employment as an employee, may constitute employment if provided by the Committee. The Committee shall determine whether any corporate transaction, such as a sale or spin-off of a division, business unit, joint venture or subsidiary that employs a
Participant, shall be deemed to result in a termination of employment with the Company for purposes of any affected Participant’s Awards. 

 SECTION V—PLAN AWARDS 

5.1 Award Types. The Committee, on behalf of the Company, is authorized under this Plan to enter into certain types of
arrangements with Eligible Persons and to confer certain benefits on them. The following arrangements or benefits are authorized under this Plan if their terms and conditions are not inconsistent with the provisions of this Plan: Options, Incentive
Bonuses, Restricted Stock, and Stock Appreciation Rights. Such arrangements and benefits are sometimes referred to herein as “Awards.” The authorized types of arrangements and benefits for which Awards may be granted are defined as
follows: 
 (a) Options: An Option is a right granted under Section 6 to purchase a number of Shares at such
exercise price, at such times, and on such other terms and conditions as are specified in the agreement(s) or terms and conditions or other document(s) evidencing the Award (the “Option Document”). Options intended to qualify as ISOs
pursuant to Code Section 422 and Options not intended to qualify as ISOs (“Nonqualified Options”) may be granted under Section 6. 
 (b) Incentive Bonus: An Incentive Bonus is a bonus opportunity awarded under Section 7 pursuant to which a Participant may become entitled to receive an amount, payable in cash or Shares, based on
satisfaction of such performance criteria as are specified in the agreement(s) or other document(s) evidencing the Award (the “Incentive Bonus Document”). 

(c) Restricted Stock: Restricted Stock is an award or issuance of Shares made under Section 8, the grant, issuance,
retention, vesting and/or transferability of which is subject during specified periods of time to such conditions (which may include continued service as a director or an employee or performance conditions) and terms as are expressed in the
agreement(s) or other document(s) evidencing the Award (the “Restricted Stock Document”). 
 (e) Stock
Appreciation Rights: A Stock Appreciation Right is a right granted under Section 9 that is exercisable at such times and on such other terms and conditions as are specified in the agreement(s) or terms and conditions or other document(s)
evidencing the Award (the “Stock Appreciation Rights Document”). 
 5.2 Grants of Awards. An Award may
consist of one such arrangement or benefit described in Section 5.1 or two or more such arrangements or benefits in tandem or in the alternative. Awards may include a tandem stock or cash right feature pursuant to Section 10.5. 

SECTION VI—OPTIONS 
 The Committee may grant an Option or provide for the grant of an Option, either from time to time in the discretion of the Committee or automatically upon the occurrence of specified events, including,
without limitation, the achievement of performance goals, or the satisfaction of an event or condition within the control of the recipient of the Award or within the control of others. 

6.1 Option Document. Each Option Document shall contain provisions regarding (a) the number of Shares that may be issued
upon exercise of the Option, (b) the purchase price of the Shares and the means of payment for the Shares, (c) the term of the Option, (d) such terms and conditions on the vesting and/or exercisability of an Option as may be
determined from time to time by the Committee, (e) restrictions on the transfer of the Option and forfeiture provisions and (f) such further terms and conditions, in each case not inconsistent with this Plan as may be determined from time
to time by the Committee. Option Documents evidencing ISOs shall contain such terms and conditions as may be necessary to qualify, to the extent determined desirable by the Committee, with the applicable provisions of Code Section 422.

 6.2 Option Price. The purchase price per share of the Shares subject to each Option granted under this Plan shall
be determined by the Committee and shall equal or exceed 100% of the fair market value on the date the Option is granted (110% of the fair market value on the date the Option is granted in the

 
case of an ISO granted to an Eligible Person who at the time of grant owns more than 10 percent of the total combined voting power of all classes of stock of ManTech within the meaning of Code
Section 422). Without prior shareholder approval, the Committee is expressly prohibited from repricing an Option if the exercise price of the new Option would be less than the exercise price of the Option under the existing Option Award,
including any Option surrendered for cancellation. 
 6.3 Option Term. The “Term” of each Option granted
under this Plan shall not exceed 8 years from the date of its grant, and shall not exceed 5 years from the date of its grant in the case of an ISO granted to an employee who at the time of grant owns more than 10 percent of the total combined voting
power of all classes of stock of ManTech within the meaning of Code Section 422. Reload Options issued on the exercise of an Option are expressly prohibited. 
 6.4 Option Vesting. Options granted under this Plan shall become vested and/or exercisable at such time and in such installments during the period prior to the expiration of the Option’s
Term as determined by the Committee. Unless the Committee provides otherwise, Options shall vest in one-third (1/3) increments on the first, second and third anniversaries of the date the Option is granted, provided that the Participant is a
director or employee of the Company on each applicable date, and subject to accelerated vesting on such events or conditions (including death, disability, or the actual occurrence of a change in control) as the Committee may provide for in its
discretion. The Committee shall have the right to make the timing of the ability to exercise any Option granted under this Plan subject to continued service as a director or an employee, the passage of time and/or such performance requirements as
deemed appropriate by the Committee. 
 6.5 Termination of Employment or Service. Unless the Committee provides
otherwise, the terms of any Option granted under this Plan shall provide (a) that if the Eligible Person to whom such Option was granted terminates employment for any reason other than death or disability, the Option shall not thereafter become
exercisable to an extent greater than it could have been exercised on the date of the Eligible Person’s termination of employment, and that on the death or disability of an Eligible Person the Option shall become fully exercisable; and
(b) that the Option shall expire and cease to be exercisable upon the earlier of the expiration of the Option Term and (i) in the case of the Eligible Person’s termination of employment on account of death or disability or ceasing to
serve as a director for any reason, the first anniversary of the termination of the Eligible Person’s employment, (ii) in the case of the Eligible Person’s termination of employment on account of a termination for cause, immediately
upon the termination of the Eligible Person’s employment, and (iii) in the case of the Eligible Person’s termination of employment for any reason other than the foregoing, ninety (90) days after the termination of the Eligible
Person’s employment, unless such person served as a director, in which case clause (b)(i) of this Section 6.5 shall apply. 
 6.6 Payment of Exercise Price. The exercise price of an Option shall be paid in the form of one or more of the following, as the Committee shall specify, either through the terms of the Option
Document or at the time of exercise of an Option: (a) cash or certified or cashiers’ check, (b) shares of capital stock of ManTech that have been held by the Participant for such period of time as the Committee may specify,
(c) other property deemed acceptable by the Committee, (d) a reduction in the number of Shares or other property otherwise issuable pursuant to such Option, (e) payment under an arrangement with a broker acceptable to ManTech where
payment is made pursuant to an irrevocable commitment by the broker to deliver to ManTech proceeds from the sale of the Shares issuable upon exercise of the Option, or (f) any combination of (a) through (e). 

 SECTION VII—INCENTIVE BONUSES 

Each Incentive Bonus Award will confer upon the Eligible Person the opportunity to earn a future payment tied to the level of achievement
with respect to one or more performance criteria established for a performance period established by the Committee. 
 7.1
Incentive Bonus Document. Each Incentive Bonus Document shall contain provisions regarding (a) the minimum, target and maximum amount payable to the Participant as an Incentive Bonus, (b) the performance criteria and level of
achievement versus these criteria that shall determine the amount of such payment, (c) the term of the performance period as to which performance shall be measured for determining the amount of any payment, (d) the timing of any payment
earned by virtue of performance, (e) restrictions on the alienation or transfer of the Incentive Bonus prior to actual payment, (f) forfeiture provisions and (g) such further terms and conditions, in each case not inconsistent with
this Plan as may be determined from time to time by the Committee. The maximum amount payable as an Incentive Bonus may be a multiple of the target amount payable, but the maximum amount payable pursuant to that portion of an Incentive Bonus Award
granted under this Plan for any fiscal year to any Participant that is intended to satisfy the requirements for “performance-based compensation” under Code Section 162(m) shall not exceed $4,000,000. 

7.2 Performance Criteria.
 (a) The Committee shall establish the performance criteria and level of achievement versus these criteria that shall determine the target and maximum amount payable under an Incentive Bonus Award, which
criteria may be based on financial performance and/or personal performance evaluations. The Committee may specify the percentage of the target Incentive Bonus that is intended to satisfy the requirements for “performance-based
compensation” under Code Section 162(m). 
 (b) Notwithstanding anything to the contrary herein, the following
provisions shall apply for any portion of an Incentive Bonus that is intended by the Committee to satisfy the requirements for “performance-based compensation” under Code Section 162(m). The performance criteria shall be a measure
based on one or more Qualifying Performance Criteria (as defined in Section 10.2) selected by the Committee and specified at the time the Incentive Bonus Award is granted. Any Incentive Bonus Award shall be made not later than 90 days after the
start of the period for which the Incentive Bonus relates and shall be made prior to the completion of 25% of the period. The Committee may not increase the amount of cash or Shares that would otherwise be payable upon achievement of the Qualifying
Performance Criteria but may reduce or eliminate the payments as provided in an Incentive Bonus Award. The Committee shall certify the extent to which any Qualifying Performance Criteria has been satisfied, and the amount payable as a result
thereof. An Incentive Bonus that is intended by the Committee to satisfy the requirements for “performance-based compensation” under Code section 162(m) may, in the Committee’s discretion or as provided in an Incentive Bonus Document,
be paid without regard to the attainment of the Qualifying Performance Criteria only in the event of a Participant’s death or disability, or the actual occurrence of a change in control (each as determined by the Committee in accordance with
the requirements of Code Section 162(m) or with such additional requirements as the Committee may choose to impose). 
 7.3
Timing and Form of Payment. The Committee shall determine the timing of payment of any Incentive Bonus which shall generally be no later than March 15 of the following calendar year after the performance period. The Committee may
provide for or, subject to such terms and conditions as the Committee may specify, may permit a Participant to elect for the payment of any Incentive Bonus to be deferred to a specified date or event. An Incentive Bonus may be payable in Shares or
in cash or other property, in each case as determined by the Committee. Any Incentive Bonus that is paid in cash or other property shall not affect the number of Shares otherwise available for issuance under this Plan. 

 7.4 Discretionary Adjustments. Notwithstanding satisfaction of any performance
goals, to the extent the Committee provides in the Incentive Bonus Document, the amount paid under an Incentive Bonus Award on account of either financial performance or personal performance evaluations may be reduced by the Committee on the basis
of such further considerations as the Committee shall determine. 
 SECTION VIII—RESTRICTED STOCK 

Restricted Stock is an award or issuance of Shares the grant, issuance, retention, vesting and/or transferability of which is subject
during specified periods of time to such conditions (including continued employment or service as a director or performance conditions) and terms as the Committee deems appropriate. 

8.1 Restricted Stock Document. Each Restricted Stock Document shall contain provisions regarding (a) the number of
Shares subject to such Award or a formula for determining such, (b) the purchase price of the Shares, if any, and the means of payment for the Shares, (c) the performance criteria, if any, and level of achievement versus these criteria
that shall determine the number of Shares granted, issued, retainable and/or vested, (d) such terms and conditions on the grant, issuance, vesting and/or forfeiture of the Shares as may be determined from time to time by the Committee,
(e) restrictions on the transferability of the Shares, and (f) such further terms and conditions in each case not inconsistent with this Plan as may be determined from time to time by the Committee. The Committee may provide for the award
of Restricted Stock in exchange for a Participant’s waiver of a bonus or other compensation. 
 8.2 Sale
Price. Subject to the requirements of applicable law, the Committee shall determine the price, if any, at which Shares of Incentive Stock shall be sold or awarded to an Eligible Person, which may vary from time to time and among Eligible
Persons and which may be below the fair market value of such Shares at the date of grant or issuance. 
 8.3 Share
Vesting. The grant, issuance, retention and/or vesting of Shares of Restricted Stock shall occur at such time and in such installments as determined by the Committee or under criteria established by the Committee. The Committee shall have
the right to make the timing of the grant and/or the issuance, ability to retain and/or vesting of Shares of Restricted Stock subject to continued employment or service as a director, passage of time and/or such performance criteria as provided by
the Committee. Unless otherwise determined by the Committee, Shares of Restricted Stock granted to employees shall vest in one-third (1/3) increments on the first, second and third anniversaries of the date the Restricted Stock is granted and
Shares of Restricted Stock granted to directors shall vest fully on the first anniversary of the date the Restricted Stock is granted, provided that the Participant has provided continuous services to the Company through each applicable date, and
subject to accelerated vesting on such events or conditions (including death, disability, or the actual occurrence of a change in control) as the Committee may provide for in its discretion. Notwithstanding anything to the contrary herein, any
Restricted Stock that is intended to satisfy the requirements for “performance-based compensation” under Code Section 162(m) shall be granted and administered in accordance with the requirements set forth in Section 7.2(b) above.

 8.4 Discretionary Adjustments. Notwithstanding satisfaction of any performance goals, to the extent provided at
the time of grant, the number of Shares granted, issued, retainable and/or vested under a Restricted Stock Award on account of either financial performance or personal performance evaluations may be adjusted by the Committee on the basis of such
further considerations as the Committee shall determine. 
 8.5 Termination of Employment or Service. Upon a
termination of employment with the Company by a Participant prior to the vesting of or the lapsing of restrictions on Restricted Stock, the Restricted Stock Awards granted to such Participant shall be subject to such procedures as determined by the
Committee. 

 SECTION IX—STOCK APPRECIATION RIGHTS 

The Committee may grant a Stock Appreciation Right or provide for the grant of an Stock Appreciation Right, either from time to time in
the discretion of the Committee or automatically upon the occurrence of specified events, including, without limitation, the achievement of performance goals or the satisfaction of an event or condition within the control of the recipient of the
Award or within the control of others. 
 9.1 Stock Appreciation Right Document. Each Stock Appreciation Right
Document shall contain provisions regarding (a) the number of Stock Appreciation Rights issued, (b) the term of the Stock Appreciation Right, (c) such terms and conditions on the vesting and/or exercisability of a Stock Appreciation
Right as may be determined from time to time by the Committee, (d) restrictions on the transfer of the Stock Appreciation Right and forfeiture provisions, and (e) such further terms and conditions, in each case not inconsistent with this
Plan as may be determined from time to time by the Committee. 
 9.2 Stock Appreciation Right Pricing. The initial
value per share of a Stock Appreciation Right granted under this Plan shall equal or exceed 100% of the fair market value for a Share on the date the Stock Appreciation Right is granted. A Stock Appreciation Right may not be amended to reduce the
fair market value of a Share on the date of grant, except as provided in Section 11 and Section 12. 
 9.3 Stock
Appreciation Right Term. The Committee shall determine the “Term” of each Stock Appreciation Right granted under this Plan and the Term shall not exceed 8 years from the date of its grant. 

9.4 Stock Appreciation Right Vesting. Stock Appreciation Rights granted under this Plan shall become vested and/or
exercisable at such time and in such installments during the period prior to the expiration of the Stock Appreciation Right’s Term as determined by the Committee. Unless the Committee provides otherwise, Stock Appreciation Rights shall vest in
one-third (1/3) increments on the first, second and third anniversaries of the date the Stock Appreciation Right is granted, provided that the Participant is a director or employee of the Company on each applicable date, and subject to
accelerated vesting on such events or conditions (including death, disability, or the actual occurrence of a change in control) as the Committee may provide for in its discretion. The Committee shall have the right to make the timing of the ability
to exercise any Stock Appreciation Right granted under this Plan subject to continued service as a director or an employee, the passage of time and/or such performance requirements as deemed appropriate by the Committee. 

9.5 Termination of Employment or Service. Unless the Committee provides otherwise, the terms of any Stock Appreciation Right
granted under this Plan shall provide (a) that if the Eligible Person to whom such Stock Appreciation Right was granted terminates employment for any reason other than death or disability, the Stock Appreciation Right shall not thereafter
become exercisable to an extent greater than it could have been exercised on the date the Eligible Person terminates employment, and that on the death or disability of an Eligible Person the Stock Appreciation Right shall become fully exercisable;
and (b) that the Stock Appreciation Right shall expire and cease to be exercisable upon the earlier of the expiration of the Stock Appreciation Right Term and (i) in the case of the Eligible Person’s termination of employment on
account of death or disability or ceasing to serve as a director for any reason, the first anniversary of the termination of the Eligible Person’s employment, (ii) in the case of the Eligible Person’s termination of employment on
account of a termination for cause, immediately upon the termination of the Eligible Person’s employment, and (iii) in the case of the Eligible Person’s termination of employment for any reason other than the foregoing, ninety
(90) days after the termination of the Eligible Person’s employment, unless such person served as a director, in which case clause (b)(i) of this Section 9.5 shall apply. 

 9.6 Payment on Stock Appreciation Right. Stock Appreciation Rights shall entitle
the Participant, upon exercise of all or any part of the Stock Appreciation Rights, to surrender to the Company the portion of the Stock Appreciation Rights so exercised and to receive in exchange from the Company an amount equal to the excess of
(x) the fair market value on the date of exercise of the Shares covered by the surrendered portion of the Stock Appreciation Right over (y) the initial value of the surrendered portion of the Stock Appreciation Right. Such amount may be
paid in cash or in Shares, or a combination of both, as set forth in the Stock Appreciation Right Document or otherwise provided for in the Committee’s discretion. The Committee may limit the amount that the Participant will be entitled to
receive upon exercise of Stock Appreciation Rights. 
 SECTION X—OTHER PROVISIONS APPLICABLE TO AWARDS 

10.1 Transferability. Unless the agreement or other document evidencing an Award (or an amendment thereto authorized by the
Committee) expressly states that the Award is transferable as provided hereunder, no Award granted under this Plan, nor any interest in such Award, may be sold, assigned, conveyed, gifted, pledged, hypothecated or otherwise transferred any manner
prior to the vesting or lapse of any and all restrictions applicable thereto, other than by will or the laws of descent and distribution. The Committee may grant an Award or amend an outstanding Award to provide that the Award is transferable or
assignable (a) in the case of a transfer without the payment of any consideration, to any “family member” as such term is defined in Section 1(a)(5) of the General Instructions to Form S-8 under the 1933 Act, as such may be
amended from time to time, or (b) in any transfer described in clause (ii) of Section 1(a)(5) of the General Instructions to Form S-8 under the 1933 Act as amended from time to time, provided that following any such transfer or
assignment the Award will remain subject to substantially the same terms applicable to the Award while held by the Participant, as modified as the Committee shall determine appropriate, and as a condition to such transfer the transferee shall
execute an agreement agreeing to be bound by such terms. 
 10.2 Qualifying Performance Criteria. For purposes of
this Plan, the term “Qualifying Performance Criteria” shall mean any one or more of the following performance criteria, either individually, alternatively or in any combination, applied to either the Company as a whole or to a business
group, subsidiary, or other division, either individually, alternatively or in any combination, and measured either annually or cumulatively over a period of years, on an absolute basis or relative to a pre-established target, to previous
years’ results or to a designated comparison group, in each case as specified by the Committee in the Award: (a) cash flow, (b) earnings measures (including earnings per share and earnings before interest, taxes and/or amortization
and/or depreciation), (c) stock price, (d) return on equity, (e) total stockholder return, (f) return on capital, (g) return on assets or net assets, (h) revenue (including revenue from direct labor, subcontractors or
any other category), (i) income or net income, (j) operating income or net operating income, (k) operating profit or net operating profit, (l) operating margin or profit margin, (m) return on operating revenue,
(n) market share, (o) contract win, renewal or extension, (p) days sales outstanding, (q) contract bookings, (r) cost control, (s) inter-company working authorizations, (t) cash management, (u) debt reduction,
(v) customer satisfaction, (w) delivery schedule, (x) cycle-time improvement, (y) productivity, (z) quality, (aa) workforce diversity, (bb) comparisons to budget items, (cc) implementation or completion of specified projects
or processes, (dd) employee turnover, (ee) forecast accuracy of any performance criteria, (ff) staff hiring, and/or (gg) completion of mergers or acquisitions. To the extent consistent with Code Section 162(m), the Committee shall have the
right to appropriately adjust any evaluation of performance under a Qualifying Performance Criteria to exclude any of the following events that occurs during a performance period: (i) asset write-downs, (ii) litigation or claim judgments
or settlements, (iii) the effect of changes in tax law, accounting principles or other such laws or provisions affecting reported results, (iv) accruals for discontinued operations, reorganization and restructuring programs, and
(v) any extraordinary non-recurring items as described in Accounting Standards Codification 225-20 and/or in management’s discussion and analysis of financial condition and results of operations appearing in ManTech’s annual report to
stockholders for the applicable year. 

 10.3 Dividends. Unless otherwise provided by the Committee, no adjustment shall
be made in Shares issuable under Awards on account of cash dividends that may be paid or other rights that may be issued to the holders of Shares prior to their issuance under any Award. No dividends or dividend equivalent amounts shall accrue or be
paid to any Participant with respect to the Shares subject to any Award that have not vested or been issued or that are subject to any restrictions or conditions on the record date for dividends, unless the Committee provides otherwise. 

10.4 Documents Evidencing Awards. The Committee shall, subject to applicable law, determine the date an Award is deemed to be
granted, which for purposes of this Plan shall not be affected by the fact that an Award is contingent on subsequent events. The Committee or, except to the extent prohibited under applicable law, its delegate(s) may establish the terms of written
or electronic agreements or other documents evidencing Awards under this Plan and may, but need not, require as a condition to any such agreement’s or document’s effectiveness that such agreement or document be executed by the Participant
and that such Participant agree to such further terms and conditions as specified in such agreement or document. The grant of an Award under this Plan shall not confer any rights upon the Participant holding such Award other than such terms, and
subject to such conditions, as are specified in this Plan as being applicable to such type of Award (or to all Awards), or as are expressly set forth in the agreement or other document evidencing such Award. The terms of an Award may be contained in
more than one document, and wherever reference is made in this Plan to an “Option Document,” or “Restricted Stock Document,” or other similar phrase, the reference shall include all of the separate documents that together may
comprise the terms and conditions relating to the Award. 
 10.5 Tandem Stock or Cash Rights. Either at the time an
Award is granted or by subsequent action, the Committee may, but need not, provide that an Award shall contain as a term thereof, a right, either in tandem with the other rights under the Award or as an alternative thereto, of the Participant to
receive, without payment to the Company, a number of Shares, cash, or a combination thereof, the amount of which is determined by reference to the value of the Award. 
 10.6 Restricted Stock Units. A “Restricted Stock Unit” is a bookkeeping entry representing an amount equivalent to the fair market value of one Share. Restricted Stock Units represent an
unfunded and unsecured obligation of the Company, except as otherwise provided for by the Committee. Restricted Stock Units may be granted in payment and satisfaction of Incentive Bonus Awards, and may be issued in lieu of any other Award that the
Committee elects to be paid in the form of Restricted Stock Units. Unless provided otherwise by the Committee, settlement of Restricted Stock Units shall be made by issuance of Shares and shall occur within 60 days of the applicable vesting date or
dates as set forth in the Restricted Stock Unit Document. The Committee may provide for Restricted Stock Units to be settled in cash (at the election of ManTech or the Participant, as specified by the Committee) and to be settled at such other times
as it determines appropriate or as it permits a Participant to choose. The amount of Shares, or other settlement medium, to be so distributed may be increased by an interest factor or by dividend equivalents, which may be valued as if reinvested in
Shares. Until a Restricted Stock Unit is settled, the number of Shares represented by a Restricted Stock Unit award shall be subject to adjustment pursuant to Section 11 and Section 12. To the extent that a Restricted Stock Unit is subject
to Code Section 409A, the terms of the Restricted Stock Unit shall be set and administered to comply with the requirements of that section. 
 10.7 Additional Restrictions on Awards. Either at the time an Award is granted or by subsequent action, the Committee may, but need not, impose such restrictions, conditions or limitations as
it determines appropriate as to the timing and manner of any resales by a Participant or other subsequent transfers by a Participant of any Shares issued under an Award, including without limitation

 
(a) restrictions under an insider trading policy, (b) restrictions designed to delay and/or coordinate the timing and manner of sales by Participants, and (c) restrictions as to
the use of a specified brokerage firm for such resales or other transfers. 
 10.8 Clawback. Any Awards issued under the
Plan shall be subject to recovery by the Company in accordance with the requirements of applicable law and the terms of any compensation recovery or clawback policy adopted by ManTech as in effect from time to time. 

SECTION XI—CHANGES IN CAPITAL STRUCTURE 
 11.1 Corporate Actions Unimpaired. The existence of outstanding Awards (including any Options) shall not affect in any way the right and power of the Company or its stockholders to make or
authorize any or all adjustments, recapitalizations, reorganizations, exchanges, or other changes in the Company’s capital structure or its business, or any merger or consolidation of the Company, or any issuance of Shares or other securities
or subscription rights thereto, or any issuance of bonds, debentures, preferred or prior preference stock ahead of or affecting the Shares or other securities of the Company or the rights thereof, or the dissolution or liquidation of the Company, or
any sale or transfer of all or any part of its assets or business, or any other corporate act or proceeding, whether of a similar character or otherwise. Further, except as expressly provided herein or by the Committee, (a) the issuance by the
Company of shares of stock of any class of securities convertible into shares of stock of any class, for cash, property, labor or services, upon direct sale, upon the exercise of rights or warrants to subscribe therefore, or upon conversion of
shares or obligations of the Company convertible into such shares or other securities, (b) the payment of a dividend in property other than Shares, or (c) the occurrence of any similar transaction, and in any case whether or not for fair
value, shall not affect, and no adjustment by reason thereof shall be made with respect to, the number of Shares subject to Options or other Awards theretofore granted or the purchase price per Share, unless the Committee shall determine in its sole
discretion that an adjustment is necessary to provide equitable treatment to a Participant. 
 11.2 Adjustments Upon Certain
Events. If the outstanding Shares or other securities of the Company, or both, for which the Award is then exercisable or as to which the Award is to be settled shall at any time be changed or exchanged by declaration of a stock dividend,
stock split, combination of shares, recapitalization, reorganization, merger, acquisition or combination or in the event of an extraordinary dividend paid in cash, debt or property, in each case as such events may be determined by the Committee to
occur, the Committee shall appropriately and equitably adjust the number and kind of Shares or other securities which are subject to this Plan or subject to any Awards theretofore granted, and the exercise or settlement prices of such Awards, so as
to maintain the proportionate number of Shares or other securities without changing the aggregate exercise or settlement price; provided, however, that such adjustment shall be made so as to not affect the status of any Award intended to qualify as
an ISO or as “performance-based compensation” under Code Section 162(m) or as exempt from Code Section 409A. 

SECTION XII—CORPORATE TRANSACTIONS 
 12.1 Assumption or Replacement of Awards by Successor. In the event of (a) a dissolution or liquidation of ManTech, (b) a merger or consolidation in which ManTech is not the
surviving corporation (other than a merger or consolidation with a wholly-owned subsidiary, a reincorporation of ManTech in a different jurisdiction, or other transaction in which there is no substantial change in the stockholders of ManTech or
their relative stock holdings and the Awards granted under this Plan are assumed, converted or replaced by the successor corporation, which assumption will be binding on all Participants), (c) a merger in which ManTech is the surviving
corporation but after which the stockholders of ManTech immediately prior to such merger (other than any stockholder that merges, or which owns or controls another corporation that merges, with ManTech in such merger) cease to own their shares or
other equity interest in ManTech, (d) the sale of substantially all of the assets of ManTech, or (e) the acquisition, sale, 

 
or transfer of more than 50% of the outstanding shares of ManTech by tender offer or similar transaction, any or all outstanding Awards may be assumed, converted or replaced by the successor
corporation (if any), which assumption, conversion or replacement will be binding on all Participants. In the alternative, the successor corporation may substitute equivalent Awards or provide substantially similar consideration to Participants as
was provided to stockholders (after taking into account the existing provisions of the Awards). The successor corporation may also issue, in place of outstanding Shares of ManTech held by the Participant, substantially similar shares or other
property subject to repurchase restrictions no less favorable to the Participant. In the event such successor corporation (if any) refuses to assume or substitute Awards, as provided above, pursuant to a transaction described in this Subsection
12.1, such Awards (in the case of Options, to the extent not exercised prior to the date of such transaction and in the case of all other Awards, to the extent not fully vested and free from any restrictions prior to the date of such transaction)
will expire on such transaction at such time and on such conditions as the Committee determines. Notwithstanding anything in this Plan to the contrary, the Committee may, in its sole discretion, but need not, provide in the terms of an Award for
alternative treatment in connection with a transaction described in this Section 12 and/or provide that the vesting of any or all Awards granted pursuant to this Plan will accelerate in connection with a transaction described in this
Section 12. 
 12.2 Other Treatment of Awards. Subject to any greater rights granted to Participants under the
foregoing provisions of this Section 12, in the event of the occurrence of any transaction described in Section 12.1 or as may be provided in any agreement between a Participant and the Company, any outstanding Awards will be treated as
provided in the applicable agreement or plan of merger, consolidation, dissolution, liquidation, or sale of assets. 
 12.3
Assumption of Awards by the Company. The Company, from time to time, also may substitute or assume outstanding awards granted by another company, whether in connection with an acquisition of such other company or otherwise, by either
(a) granting an Award under this Plan in substitution of such other company’s award; or (b) assuming such award as if it had been granted under this Plan if the terms of such assumed award could be applied to an Award granted under
this Plan. Such substitution or assumption will be permissible if the holder of the substituted or assumed award would have been eligible to be granted an Award under this Plan if the other company had applied the rules of this Plan to such grant.
In the event the Company assumes an award granted by another company, the terms and conditions of such award will remain unchanged (except that the exercise price and the number and nature of Shares issuable upon exercise of any such option will be
adjusted appropriately pursuant to Code Sections 424(a) or 409A, as applicable). In the event the Company elects to grant a new Option rather than assuming an existing option, such new Option may be granted with a similarly adjusted exercise
price. 
 SECTION XIII—TAXES 
 13.1 Withholding Requirements. The Committee may make such provisions or impose such conditions as it may deem appropriate for the withholding or payment by a Participant of any taxes that the
Committee determines are required in connection with any Award granted under this Plan, and a Participant’s rights in any Award are subject to satisfaction of such conditions. 

13.2 Payment of Withholding Taxes. Notwithstanding the terms of Section 13.1, the Committee may provide in the agreement
or other document evidencing an Award or otherwise that all or any portion of the taxes required to be withheld by the Company or, if permitted by the Committee, desired to be paid by the Participant, in connection with the exercise, vesting,
settlement or transfer of any Award shall or may be paid by the Company withholding Shares otherwise issuable or subject to such Award, by the Participant delivering previously owned Shares, in each case having a fair market value equal to the
amount required or elected to be withheld or paid, or by a broker selected or approved by the Company paying such amount pursuant to an irrevocable commitment by the broker to deliver to the Company

 
proceeds from the sale of the Shares issuable under the Award. Any such election is subject to such conditions or procedures as may be established by the Committee and may be subject to approval
by the Committee. 
 SECTION XIV—AMENDMENTS OR TERMINATION 

The Board may amend, alter or discontinue this Plan or any agreement or other document evidencing an Award made under this Plan but,
except as provided pursuant to the anti-dilution adjustment provisions of Section 11 and the change of control provisions of Section 12, no such amendment shall, without the approval of the stockholders of ManTech materially increase the
maximum number of Shares for which Awards may be granted under this Plan, expand the class of persons eligible to be Eligible Employees or Participants, or otherwise materially revise (within the meaning of applicable Nasdaq listing requirements)
this Plan in any material respect. 
 The Board may amend, alter or discontinue this Plan or any agreement evidencing an Award
made under this Plan, but no amendment or alteration shall be made which would impair the rights of any Award holder, without such holder’s consent, under any Award theretofore granted, provided that no such consent shall be required if the
Committee determines in its sole discretion that such amendment or alteration either (i) is required or advisable in order for the Company, this Plan or the Award to satisfy any law or regulation or to meet the requirements of any accounting
standard; (ii) is not reasonably likely to significantly diminish the benefits provided under such Award, or that any such diminishment has been adequately compensated; (iii) is deemed necessary to ensure that the Company may obtain any
approval referred to in Section 15 of the Plan or to ensure that the grant or exercise of any Award or any other provision of this Plan satisfies requirements for an exemption under Section 16(b) of the Exchange Act or Code Sections
162(m), 280G, 409A, 422 or 4999; or (iv) is made pursuant to Sections 11 or 12 hereof. 
 SECTION XV—COMPLIANCE WITH
OTHER LAWS AND REGULATIONS 
 This Plan, the grant and exercise of Awards thereunder, and the obligation of the Company to
sell, issue, or deliver Shares under such Awards, shall be subject to all applicable federal, state and foreign laws, rules, and regulations and to such approvals by any governmental or regulatory agency as may be required. The Company shall not be
required to register in a Participant’s name or deliver any Shares prior to the completion of any registration or qualification of such Shares under any federal, state or foreign law or any ruling or regulation of any government body which the
Committee shall determine to be necessary or advisable. This Plan is intended to constitute an unfunded arrangement for a select group of the Company’s directors and management, or other key employees. 

No Option shall be exercisable unless a registration statement with respect to the Option is effective or the Company has determined that
such registration is unnecessary. Unless the Awards and Shares covered by this Plan have been registered under the Securities Act of 1933, as amended, or the Company has determined that such registration is unnecessary, each person receiving an
Award and/or Shares pursuant to any Award may be required by the Company to give a representation in writing that such person is acquiring such Shares for his or her own account for investment and not with a view to, or for sale in connection with,
the distribution of any part thereof. 
 The Plan is intended to operate in compliance with the provisions of Securities and
Exchange Commission Rule 16b-3 and to facilitate compliance with, and optimize the benefits from, Code Section 162(m) and Code Section 409A. The terms of this Plan are subject to all present and future regulations and rulings of the
Secretary of the Treasury of the United States or his or her delegate relating to the qualification of ISOs under the Code. If any provision of the Plan conflicts with any such regulation or ruling, then that provision of the Plan shall be void and
of no effect. 

 SECTION XVI—OPTION GRANTS AND AWARDS BY SUBSIDIARIES 

In the case of a grant of an Option or other Award granted to any Eligible Person employed by a subsidiary, such grant may, if the
Committee so directs, be implemented by ManTech issuing any subject Shares to the subsidiary, for such lawful consideration as the Committee may determine, upon the condition or understanding that the subsidiary will transfer the Shares to the
Participant in accordance with the terms of the Option or other Award specified by the Committee pursuant to the provisions of this Plan. Notwithstanding any other provision hereof, such Option or other Award may be issued by and in the name of the
subsidiary and shall be deemed granted on such date as the Committee shall determine. 
 SECTION XVII—NO RIGHT TO COMPANY
EMPLOYMENT OR 
 SERVICE AS A DIRECTOR 
 Nothing in this Plan or as a result of any Award granted pursuant to this Plan shall confer on any individual any right to continue in the employ of the Company or as a director of the Company or
interfere in any way with the right of the Company to terminate an individual’s employment or service as a director at any time. The agreements or other documents evidencing Awards may contain such provisions as the Committee may approve with
reference to the effect of approved leaves of absence. 
 SECTION XVIII—LIABILITY OF COMPANY 

The Company shall not be liable to a Participant, an Eligible Person or other persons as to: 

(a) The Non-Issuance of Shares. The non-issuance or sale of Shares as to which the Company has been unable to obtain
from any regulatory body having jurisdiction the authority deemed by the Company’s counsel to be necessary to the lawful issuance and sale of any Shares hereunder; and 

(b) Tax Consequences. Any tax consequences of any Participant, Eligible Person or other person due to the receipt,
exercise or settlement of any Option or other Award granted hereunder. 
 SECTION XIX—EFFECTIVENESS AND EXPIRATION OF
PLAN 
 This Restatement of the Plan shall be effective as of May 12, 2011 if approved by shareholders of ManTech. No
Awards shall be granted pursuant to this Plan more than ten (10) years after the effective date of this Plan. 
 SECTION
XX—NON-EXCLUSIVITY OF PLAN 
 Neither the adoption of this Plan by the Board nor the submission of this Plan to the
stockholders of ManTech for approval shall be construed as creating any limitations on the power of the Board or the Committee to adopt such other incentive arrangements as either may deem desirable, including without limitation, the granting of
restricted stock or stock options otherwise than under this Plan, and such arrangements may be either generally applicable or applicable only in specific cases. 
 SECTION XXI—GOVERNING LAW 
 This Plan and any agreements or other
documents hereunder shall be interpreted and construed in accordance with the laws of the Commonwealth of Virginia and applicable federal law. Unless otherwise provided in the document or other agreement evidencing an Award, any dispute as to any
Award shall be presented and determined exclusively in a state court in the Commonwealth of Virginia. Any reference in this Plan or in the agreement or other document evidencing any Award to a provision of law or to a rule or regulation shall be
deemed to include any successor law, rule, or regulation of similar effect or applicability.

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