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                                                                   Exhibit 10.17

                         EXECUTIVE EMPLOYMENT AGREEMENT

       This EXECUTIVE EMPLOYMENT AGREEMENT ("Agreement") is made as of the 14th
day of April, 2006, between Optium Corporation, a Delaware corporation (the
"Company"), and Eitan Gertel ("Executive").

       WHEREAS, the Company desires to employ Executive and Executive desires to
be employed by the Company on the terms contained herein; and

       WHEREAS Executive has or in simultaneously entering into the Company's
Employee Agreement Regarding Inventions, Confidentiality and Non-Competition
(the "Employee Agreement").

       NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

1.     EMPLOYMENT. The term of this Agreement shall extend from the date hereof
(the "Commencement Date") until the third anniversary of the Commencement Date;
provided, however, that the term of this Agreement shall automatically be
extended for one additional year on the third anniversary of the Commencement
Date and each anniversary thereafter unless, not less than 90 days prior to each
such date, either party shall have given notice to the other that it does not
wish to extend this Agreement; provided, further, that if a Change in Control
occurs during the original or extended term of this Agreement, the term of this
Agreement shall continue in effect for a period of not less than twelve (12)
months beyond the month in which the Change in Control occurred. The term of
this Agreement shall be subject to termination as provided in Paragraph 6 and
may be referred to herein as the "Period of Employment."

2.     POSITION AND DUTIES. During the Period of Employment, Executive shall
serve as the President and Chief Executive Officer and member of the Board of
Directors of the Company, and shall have supervision and control over and
responsibility for the day-to-day business and affairs of those functions and
operations of the Company and shall have such other powers and duties as may
from time to time be prescribed by the Board of Directors of the Company (the
"Board"), provided that such duties are consistent with Executive's position or
other positions that he may hold from time to time. Executive shall devote his
full working time and efforts to the business and affairs of the Company.
Notwithstanding the foregoing, Executive may serve on other boards of directors,
with the approval of the Board, or engage in religious, charitable or other
community activities as long as such services and activities are disclosed to
the Board and do not materially interfere with Executive's performance of his
duties to the Company as provided in this Agreement.

3.     COMPENSATION AND RELATED MATTERS.

       (a)    BASE SALARY AND INCENTIVE COMPENSATION. Executive's initial annual
base salary shall be $250,000. Executive's base salary shall be redetermined
annually by the Board or a Committee thereof; provided, that following a Change
in Control (as defined below), Executive's base salary may not be reduced except
for across-the-board reductions similarly affecting all or

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substantially all management employees. The base salary in effect at any given
time is referred to herein as "Base Salary." The Base Salary shall be payable in
substantially equal bi-weekly installments. In addition to Base Salary,
Executive shall be eligible to receive cash incentive compensation as determined
by the Board or a Committee thereof from time to time, and shall also be
eligible to participate in such incentive compensation plans as the Board or a
Committee thereof shall determine from time to time for employees of the same
status within the hierarchy of the Company.

       (b)    EXPENSES. Executive shall be entitled to receive prompt
reimbursement for all reasonable expenses incurred by him in performing services
hereunder during the Period of Employment, in accordance with the policies and
procedures then in effect and established by the Company for its senior
executive officers.

       (c)    OTHER BENEFITS. During the Period of Employment, Executive shall
be entitled to participate in or receive benefits under all of the Company's
Employee Benefit Plans in effect for all executive level personnel or applicable
generally to employees of the Company from time to time, subject to the terms
and conditions of such plans. As used herein, the term "Employee Benefit Plans"
includes, without limitation, each pension and retirement plan; supplemental
pension, retirement and deferred compensation plan; savings and profit-sharing
plan; stock ownership plan; stock purchase plan; stock option plan; life
insurance plan; medical insurance plan; disability plan; and health and accident
plan or arrangement established and maintained by the Company on the date hereof
for employees of the same status within the hierarchy of the Company. To the
extent that the scope or nature of benefits described in this section is
determined under the policies of the Company based in whole or in part on the
seniority of an employee's service, Executive shall be deemed to have seniority
with the Company equal to the actual time of Executive's service with the
Company. During the Period of Employment, Executive shall be entitled to
participate in or receive benefits under any employee benefit plan or
arrangement which may, in the future, be made available by the Company to its
executives and key management employees, subject to and on a basis consistent
with the terms, conditions and overall administration of such plan or
arrangement. Any payments or benefits payable to Executive under a plan or
arrangement referred to in this Subparagraph 3(c) in respect of any calendar
year during which Executive is employed by the Company for less than the whole
of such year shall, unless otherwise provided in the applicable plan or
arrangement, be prorated in accordance with the number of days in such calendar
year during which he is so employed. Should any such payments or benefits accrue
on a fiscal (rather than calendar) year, then the proration in the preceding
sentence shall be on the basis of a fiscal year rather than calendar year.

       (d)    PAID TIME OFF. Executive shall be entitled to twenty (20) days of
paid time off in each calendar year usuable in accordance with the Company's
policies, which shall be accrued ratably during the calendar year. Executive
shall also be entitled to all paid holidays given by the Company to its
executives. To the extent that the scope or nature of benefits described in this
section are determined under the policies of the Company based in whole or in
part on the seniority or tenure of an employee's service, Executive shall be
deemed to have a tenure with the Company equal to the actual time of Executive's
service with Company.

4.     TERMINATION. Executive's employment hereunder may be terminated without
any breach of this Agreement under the following circumstances:

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       (a)    DEATH. Executive's employment hereunder shall terminate upon his
death.

       (b)    DISABILITY. If, as a result of Executive's incapacity due to
physical or mental illness, Executive shall have been absent from his duties
hereunder on a full-time basis for one hundred eighty (180) calendar days in the
aggregate in any twelve (12) month period, the Company may terminate Executive's
employment hereunder.

       (c)    TERMINATION BY COMPANY FOR CAUSE. At any time during the Period of
Employment, the Company may terminate Executive's employment hereunder for Cause
if such termination is approved by not less than a majority of the Board at a
meeting of the Board called and held for such purpose. For purposes of this
Agreement, "Cause" shall mean: (A) conduct by Executive constituting a material
act of willful misconduct in connection with the performance of his duties,
including, without limitation, misappropriation of funds or property of the
Company or any of its affiliates other than the occasional, customary and de
minimis use of Company property for personal purposes; (B) criminal or civil
conviction or indictment of Executive, a plea of nolo contendere by Executive or
conduct by Executive that would reasonably be expected to result in material
injury to the reputation of the Company if he were retained in his position with
the Company, including, without limitation, conviction or indictment of a felony
involving moral turpitude; (C) continued, willful and deliberate non-performance
by Executive of his duties hereunder (other than by reason of Executive's
physical or mental illness, incapacity or disability) which has continued for
more than thirty (30) days following written notice of such non-performance from
the Board; (D) a breach by Executive of any of the material provisions of the
Executive's Employee Agreement regarding Inventions, Confidentiality and
Non-Competition (the "Employee Agreement") which is not or cannot be cured
within ten (10) days following written notice of such breach from the Board; or
(E) a material violation by Executive of the Company's employment policies which
has continued following written notice of such violation from the Board. In the
event that the agreements or plans governing any of Executive's stock-based
grants and awards include and use a definition of "Cause", the definition of
Cause above shall supercede and apply in place of any such definition in the
applicable agreement and/or plan with respect to Executive's applicable
stock-based grants and awards.

       (d)    TERMINATION WITHOUT CAUSE. At any time during the Period of
Employment, the Company may terminate Executive's employment hereunder without
Cause if such termination is approved by the Board at a meeting of the Board
called and held for such purpose. Any termination by the Company of Executive's
employment under this Agreement which does not constitute a termination for
Cause under Subparagraph 4(c) or result from the death or disability of the
Executive under Subparagraph 4(a) or (b) shall be deemed a termination without
Cause. If the Company provides notice to Executive under Paragraph 1 that it
does not wish to extend the Period of Employment, such action shall be deemed a
termination without Cause.

       (e)    TERMINATION BY EXECUTIVE. At any time during the Period of
Employment, Executive may terminate his employment hereunder for any reason,
including but not limited to Constructive Termination. If Executive provides
notice to the Company under Paragraph 1 that he does not wish to extend the
Period of Employment, such action shall be deemed a voluntary termination by
Executive and one without Constructive Termination. For purposes of this
Agreement, "Constructive Termination" shall mean that Executive has complied
with the

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"Constructive Termination Process" (hereinafter defined) following the
occurrence of any of the following events: (A) a substantial diminution or other
substantive adverse change, not consented to by Executive, in the nature or
scope of Executive's responsibilities, authorities, powers, functions or duties;
(B) any removal, during the Period of Employment, from Executive of his title of
President and Chief Executive Officer or membership on the Board; (C) an
involuntary reduction in Executive's Base Salary except for across-the-board
reductions similarly affecting all or substantially all management employees;
(D) a breach by the Company of any of its other material obligations under this
Agreement and the failure of the Company to cure such breach within thirty (30)
days after written notice thereof by Executive; (E) the involuntary relocation
of the Company's offices at which Executive is principally employed to a
location more than thirty (30) miles from such offices, or the requirement by
the Company that Executive be based anywhere other than the Company's offices at
such location on an extended basis, except for required travel on the Company's
business to an extent substantially consistent with Executive's business travel
obligations; or (F) the failure of the Company to obtain the agreement from any
successor to the Company to assume and agree to perform this Agreement as
required by Paragraph 9. "Constructive Termination Process" shall mean that (i)
Executive reasonably determines in good faith that a "Constructive Termination"
event has occurred; (ii) Executive notifies the Company in writing of the
occurrence of the Constructive Termination event; (iii) Executive cooperates in
good faith with the Company's efforts, for a period not less than sixty (60)
days following such notice, to modify Executive's employment situation in a
manner acceptable to Executive and Company; and (iv) notwithstanding such
efforts, one or more of the Constructive Termination events continues to exist
and has not been modified in a manner acceptable to Executive. If the Company
cures the Constructive Termination event in a manner acceptable to Executive
during the sixty (60) day period, Constructive Termination shall be deemed not
to have occurred. In the event that the agreements or plans governing any of
Executive's stock-based grants and awards include and use a definition of
"Constructive Termination", the definition of Constructive Termination above
shall supercede and apply in place of any such definition in the applicable
agreement and/or plan with respect to Executive's applicable stock-based grants
and awards.

       (f)    NOTICE OF TERMINATION. Except for termination as specified in
Subparagraph 4(a), any termination of Executive's employment by the Company or
any such termination by Executive shall be communicated by written Notice of
Termination to the other party hereto. For purposes of this Agreement, a "Notice
of Termination" shall mean a notice which shall indicate the specific
termination provision in this Agreement relied upon.

       (g)    DATE OF TERMINATION. "Date of Termination" shall mean: (A) if
Executive's employment is terminated by his death, the date of his death; (B) if
Executive's employment is terminated on account of disability under Subparagraph
4(b) or by the Company for Cause under Subparagraph 4(c), the date on which
Notice of Termination is given; (C) if Executive's employment is terminated by
the Company under Subparagraph 4(d), sixty (60) days after the date on which a
Notice of Termination is given; and (D) if Executive's employment is terminated
by Executive under Subparagraph 4(e), thirty (30) days after the date on which a
Notice of Termination is given.

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5.     COMPENSATION UPON TERMINATION OR DURING DISABILITY.

       (a)    If Executive's employment terminates by reason of his death, the
Company shall, within ninety (90) days of death, pay in a lump sum amount to
such person as Executive shall designate in a notice filed with the Company or,
if no such person is designated, to Executive's estate, Executive's accrued and
unpaid Base Salary to the date of his death, plus his accrued and unpaid
incentive compensation, if any, under Subparagraph 3(a), plus his unused paid
time off. All stock-based grants and awards held by Executive shall be treated
upon the death of the Executive in accordance with their terms. For a period of
one (1) year following the Date of Termination, the Company shall pay such
health insurance premiums as may be necessary to allow Executive's spouse and
dependents to receive health insurance coverage substantially similar to
coverage they received prior to the Date of Termination. In addition to the
foregoing, any payments to which Executive's spouse, beneficiaries, or estate
may be entitled under any employee benefit plan shall also be paid in accordance
with the terms of such plan or arrangement. Such payments, in the aggregate,
shall fully discharge the Company's obligations hereunder.

       (b)    During any period that Executive fails to perform his duties
hereunder as a result of incapacity due to physical or mental illness, Executive
shall continue to receive his accrued and unpaid Base Salary and accrued and
unpaid incentive compensation, if any, under Subparagraph 3(a), until
Executive's employment is terminated due to disability in accordance with
Subparagraph 4(b) or until Executive terminates his employment in accordance
with Subparagraph 4(e), whichever first occurs. All stock-based grants and
awards held by Executive shall be treated upon the Date of Termination in
accordance with their terms. For a period of one (1) year following the Date of
Termination, the Company shall pay such health insurance premiums as may be
necessary to allow Executive and Executive's spouse and dependents to receive
health insurance coverage substantially similar to coverage they received prior
to the Date of Termination. Upon termination due to death prior to the
termination first to occur as specified in the preceding sentence, Subparagraph
5(a) shall apply.

       (c)    If Executive's employment is terminated by Executive other than
for Constructive Termination as provided in Subparagraph 4(e), then the Company
shall, through the Date of Termination, pay Executive his accrued and unpaid
Base Salary at the rate in effect at the time Notice of Termination is given,
plus his unused paid time off. Thereafter, the Company shall have no further
obligations to Executive except as otherwise expressly provided under this
Agreement, provided any such termination shall not adversely affect or alter
Executive's rights under any employee benefit plan of the Company in which
Executive, at the Date of Termination, has a vested interest, unless otherwise
provided in such employee benefit plan or any agreement or other instrument
attendant thereto. All stock-based grants and awards held by Executive shall be
treated upon the Date of Termination in accordance with their terms.

       (d)    If Executive terminates his employment for Constructive
Termination as provided in Subparagraph 4(e) or if Executive's employment is
terminated by the Company without Cause as provided in Subparagraph 4(d), then
the Company shall, through the Date of Termination, pay Executive his accrued
and unpaid Base Salary at the rate in effect at the time Notice of Termination
is given and his accrued and unpaid incentive compensation, if any, under

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Subparagraph 3(a), plus his unused paid time off. In addition, subject to
signing by Executive of a general mutual release of claims in a form and manner
satisfactory to the Company,

              (i)    the Company shall pay Executive an amount equal to one (1)
       times the sum of Executive's current Base Salary and his Average
       Incentive Compensation (the "Severance Amount"). The Severance Amount
       shall be paid out in substantially equal bi-weekly installments over
       twelve (12) months, in arrears. For purposes of this Agreement, "Average
       Incentive Compensation" shall mean the average of the annual incentive
       compensation under Subparagraph 3(a) received by Executive for the three
       (3) immediately preceding fiscal years or such fewer number of complete
       fiscal years as Executive may have been employed by the Company. In no
       event shall "Average Incentive Compensation" include any sign-on bonus,
       retention bonus or any other special bonus. Notwithstanding the
       foregoing, if the Executive breaches any of the material provisions
       contained in the Employee Agreement, all payments of the Severance Amount
       shall immediately cease. Furthermore, in the event Executive terminates
       his employment for Constructive Termination as provided in Subparagraph
       4(e), he shall be entitled to the Severance Amount only if he provides
       the Notice of Termination provided for in Subparagraph 4(f) within thirty
       (30) days after the occurrence of the event or events which constitute
       such Constructive Termination as specified in clauses (A), (B), (C), (D)
       and (E) of Subparagraph 4(e); and

              (ii)   in addition to any other benefits to which Executive may be
       entitled in accordance with the Company's then existing severance
       policies, the Company shall, for a period of one (1) year commencing on
       the Date of Termination, pay such health insurance premiums as may be
       necessary to allow Executive and Executive's spouse and dependents to
       continue to receive health insurance coverage.

       (e)    If Executive's employment is terminated by the Company for Cause
as provided in Subparagraph 4(c), then the Company shall, through the Date of
Termination, pay Executive his accrued and unpaid Base Salary at the rate in
effect at the time Notice of Termination is given, plus his unused paid time
off. Thereafter, the Company shall have no further obligations to Executive
except as otherwise expressly provided under this Agreement, provided any such
termination shall not adversely affect or alter Executive's rights under any
employee benefit plan of the Company in which Executive, at the Date of
Termination, has a vested interest, unless otherwise provided in such employee
benefit plan or any agreement or other instrument attendant thereto. All
stock-based grants and awards held by Executive shall be treated upon the Date
of Termination in accordance with their terms.

       (f)    Nothing contained in the foregoing Subparagraphs 5(a) through 5(e)
shall be construed so as to affect Executive's rights or the Company's
obligations relating to agreements or benefits which are unrelated to
termination of employment.

6.     CHANGE IN CONTROL PAYMENT. The provisions of this Paragraph 6 set forth
certain terms of an agreement reached between Executive and the Company
regarding Executive's rights and obligations upon the occurrence of a Change in
Control of the Company. These provisions are intended to assure and encourage in
advance Executive's continued attention and dedication to his assigned duties
and his objectivity during the pendency and after the occurrence of any such

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event. These provisions shall apply in lieu of, and expressly supersede, the
provisions of Subparagraph 5(d)(i) regarding severance pay upon a termination of
employment, if such termination of employment occurs within twelve (12) months
after the occurrence of the first event constituting a Change of Control,
provided that such first event occurs during the Period of Employment. These
provisions shall terminate and be of no further force or effect beginning twelve
(12) months after the occurrence of a Change of Control.

       (a)    CHANGE IN CONTROL.

              (i)    If within twelve (12) months after the occurrence of the
       first event constituting a Change in Control, Executive's employment is
       terminated by the Company without Cause as provided in Subparagraph 4(d)
       or Executive terminates his employment for Constructive Termination as
       provided in Subparagraph 4(e), then the Company shall pay Executive a
       lump sum in cash in an amount equal to his unused paid time off, plus two
       (2) times the sum of (A) Executive's current Base Salary plus (B)
       Executive's most recent annual incentive compensation under Subparagraph
       3(a) for the most recent fiscal year, excluding any sign-on bonus,
       retention bonus or any other special bonus;

              (ii)   Executive shall be entitled to any rights and benefits with
       respect to stock-related awards, to the extent and upon the terms
       provided in the applicable incentive agreement or any agreement or other
       instrument attendant thereto pursuant to which such options or awards
       were granted; and

              (iii)  The Company shall, for a period of one (1) year commencing
       on the Date of Termination, pay such health insurance premiums as may be
       necessary to allow Executive, Executive's spouse and dependents to
       continue to receive health insurance coverage substantially similar to
       the coverage they received prior to the Date of Termination.

       (b)    GROSS UP PAYMENT.

              (i)    Anything in this Agreement to the contrary notwithstanding,
       in the event it shall be determined that any compensation, payment or
       distribution by the Company to or for the benefit of Executive, whether
       paid or payable or distributed or distributable pursuant to the terms of
       this Agreement or otherwise, including, without limitation, pursuant to
       the terms of any stock options or other stock-related awards (the
       "Severance Payments"), would be subject to the excise tax imposed by
       Section 4999 of the Internal Revenue Code of 1986, as amended (the
       "Code"), or any interest or penalties are incurred by Executive with
       respect to such excise tax (such excise tax, together with any such
       interest and penalties, are hereinafter collectively referred to as the
       "Excise Tax"), then Executive shall be entitled to receive an additional
       payment (a "Gross-Up Payment") such that the net amount retained by
       Executive, after deduction of any Excise Tax on the Severance Payments,
       any Federal, state, and local income tax, employment tax and Excise Tax
       upon the payment provided by this subsection, and any interest and/or
       penalties assessed with respect to such Excise Tax, shall be equal to the
       Severance Payments.

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              (ii)   Subject to the provisions of Subparagraph 6(b)(iii), all
       determinations required to be made under this Subparagraph 6(b)(ii),
       including whether a Gross-Up Payment is required and the amount of such
       Gross-Up Payment, shall be made by Ernst & Young or any other nationally
       recognized accounting firm selected by the Company (the "Accounting
       Firm"), which shall provide detailed supporting calculations both to the
       Company and Executive within fifteen (15) business days of the Date of
       Termination, if applicable, or at such earlier time as is reasonably
       requested by the Company or Executive. For purposes of determining the
       amount of the Gross-Up Payment, Executive shall be deemed to pay federal
       income taxes at the highest marginal rate of federal income taxation
       applicable to individuals for the calendar year in which the Gross-Up
       Payment is to be made, and state and local income taxes at the highest
       marginal rates of individual taxation in the state and locality of
       Executive's residence on the Date of Termination, net of the maximum
       reduction in federal income taxes which could be obtained from deduction
       of such state and local taxes. The initial Gross-Up Payment, if any, as
       determined pursuant to this Subparagraph 6(b)(ii), shall be paid to
       Executive within five (5) days of the receipt of the Accounting Firm's
       determination. If the Accounting Firm determines that no Excise Tax is
       payable by Executive, the Company shall furnish Executive with an opinion
       of counsel that failure to report the Excise Tax on Executive's
       applicable federal income tax return would not result in the imposition
       of a negligence or similar penalty. Any determination by the Accounting
       Firm shall be binding upon the Company and Executive. As a result of
       uncertainty in the application of Section 4999 of the Code at the time of
       the initial determination by the Accounting Firm hereunder, it is
       possible that Gross-Up Payments which will not have been made by the
       Company should have been made (an "Underpayment"). In the event that the
       Company exhausts its remedies pursuant to Subparagraph 6(b)(iii) and
       Executive thereafter is required to make a payment of any Excise Tax, the
       Accounting Firm shall determine the amount of the Underpayment that has
       occurred, consistent with the calculations required to be made hereunder,
       and any such Underpayment, and any interest and penalties imposed on the
       Underpayment and required to be paid by Executive in connection with the
       proceedings described in Subparagraph 6(b)(iii), shall be promptly paid
       by the Company to or for the benefit of Executive.

              (iii)  Executive shall notify the Company in writing of any claim
       by the Internal Revenue Service that, if successful, would require the
       payment by the Company of the Gross-up Payment. Such notification shall
       be given as soon as practicable but no later than ten (10) business days
       after Executive knows of such claim and shall apprise the Company of the
       nature of such claim and the date on which such claim is requested to be
       paid. Executive shall not pay such claim prior to the expiration of the
       30-day period following the date on which he gives such notice to the
       Company (or such shorter period ending on the date that any payment of
       taxes with respect to such claim is due). If the Company notifies
       Executive in writing prior to the expiration of such period that it
       desires to contest such claim, provided that the Company has set aside
       adequate reserves to cover the Underpayment and any interest and
       penalties thereon that may accrue, Executive shall:

                     (A)    give the Company any information reasonably
              requested by the Company relating to such claim,

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                     (B)    take such action in connection with contesting such
              claim as the Company shall reasonably request in writing from time
              to time, including, without limitation, accepting legal
              representation with respect to such claim by an attorney selected
              by the Company,

                     (C)    cooperate with the Company in good faith in order to
              effectively contest such claim, and

                     (D)    permit the Company to participate in any proceedings
              relating to such claim; provided, however, that the Company shall
              bear and pay directly all costs and expenses (including additional
              interest and penalties) incurred in connection with such contest
              and shall indemnify and hold Executive harmless, on an after-tax
              basis, for any Excise Tax or income tax, including interest and
              penalties with respect thereto, imposed as a result of such
              representation and payment of costs and expenses. Without
              limitation on the foregoing provisions of this Subparagraph
              6(b)(iii), the Company shall control all proceedings taken in
              connection with such contest and, at its sole option, may pursue
              or forego any and all administrative appeals, proceedings,
              hearings and conferences with the taxing authority in respect of
              such claim and may, at its sole option, either direct Executive to
              pay the tax claimed and sue for a refund or contest the claim in
              any permissible manner, and Executive agrees to prosecute such
              contest to a determination before any administrative tribunal, in
              a court of initial jurisdiction and in one or more appellate
              courts, as the Company shall determine; provided, however, that if
              the Company directs Executive to pay such claim and sue for a
              refund, the Company shall advance the amount of such payment to
              Executive on an interest-free basis and shall indemnify and hold
              Executive harmless, on an after-tax basis, from any Excise Tax or
              income tax, including interest or penalties with respect thereto,
              imposed with respect to such advance or with respect to any
              imputed income with respect to such advance; and further provided
              that any extension of the statute of limitations relating to
              payment of taxes for the taxable year of Executive with respect to
              which such contested amount is claimed to be due is limited solely
              to such contested amount. Furthermore, the Company's control of
              the contest shall be limited to issues with respect to which a
              Gross-Up Payment would be payable hereunder and Executive shall be
              entitled to settle or contest, as the case may be, any other
              issues raised by the Internal Revenue Service or any other taxing
              authority.

              (iv)   If, after the receipt by Executive of an amount advanced by
       the Company pursuant to Subparagraph 6(b)(iii), Executive becomes
       entitled to receive any refund with respect to such claim, Executive
       shall (subject to the Company's complying with the requirements of
       Subparagraph 6(b)(iii)) promptly pay to the Company the amount of such
       refund (together with any interest paid or credited thereon after taxes
       applicable thereto). If, after the receipt by Executive of an amount
       advanced by the Company pursuant to Subparagraph 6(b)(iii), a
       determination is made that Executive shall not be entitled to any refund
       with respect to such claim and the Company does not notify Executive in
       writing of its intent to contest such denial of refund prior to the
       expiration of 30 days after such determination, then such advance shall
       be forgiven and shall not be required to be repaid

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       and the amount of such advance shall offset, to the extent thereof, the
       amount of Gross-Up Payment required to be paid.

       (c)    DEFINITIONS. For purposes of this Paragraph 6, the following terms
shall have the following meanings:

       Prior to the consummation of the Company's initial public offering of its
common stock pursuant to an effective registration statement under the
Securities Act of 1933, as amended (the "IPO"), "Change of Control" shall have
the meaning ascribed to such term in the Company's 2000 Stock Incentive Plan, as
amended. Thereafter, "Change in Control" shall mean any of the following:

              (i)    any "person," as such term is used in Sections 13(d) and
       14(d) of the Securities Exchange Act of 1934, as amended (the "Act")
       (other than the Company, any of its subsidiaries, or any trustee,
       fiduciary or other person or entity holding securities under any employee
       benefit plan or trust of the Company or any of its subsidiaries),
       together with all "affiliates" and "associates" (as such terms are
       defined in Rule 12b-2 under the Act) of such person, shall acquire (as
       such term is defined in Rule 13d-3 under the Act), directly or
       indirectly, securities of the Company representing twenty-five percent
       (25%) or more of either (A) the combined voting power of the Company's
       then outstanding securities having the right to vote in an election of
       the Company's Board ("Voting Securities") or (B) the then outstanding
       shares of Company's common stock, par value $0.0001 per share ("Common
       Stock") (other than by a person who holds, as of the Effective Date,
       directly or indirectly securities of the Company representing twenty
       percent (20%) or more of either (A) the combined voting power of the
       Company's then outstanding Voting Securities or (B) the then outstanding
       shares of Company's Common Stock); or

              (ii)   persons who, as of the Commencement Date, constitute the
       Company's Board (the "Incumbent Directors") cease for any reason,
       including, without limitation, as a result of a tender offer, proxy
       contest, merger or similar transaction, to constitute at least a majority
       of the Board, provided that any person becoming a director of the Company
       subsequent to the Commencement Date shall be considered an Incumbent
       Director if such person's election was approved by or such person was
       nominated for election by a vote of at least a majority of the Incumbent
       Directors then constituting the Board or the nominating committee
       thereof; but provided further, that any such person whose initial
       assumption of office is in connection with an actual or threatened
       election contest relating to the election of members of the Board or
       other actual or threatened solicitation of proxies or consents by or on
       behalf of a person other than the Board, including by reason of agreement
       intended to avoid or settle any such actual or threatened contest or
       solicitation, shall not be considered an Incumbent Director; or

              (iii)  the stockholders of the Company shall approve (A) any
       consolidation or merger of the Company where the stockholders of the
       Company, immediately prior to the consolidation or merger, would not,
       immediately after the consolidation or merger, beneficially own (as such
       term is defined in Rule 13d-3 under the Act), directly or indirectly,
       shares representing in the aggregate more than fifty percent (50%) of the

                                       10
<Page>

       voting shares of the Company issuing cash or securities in the
       consolidation or merger (or of its ultimate parent corporation, if any),
       (B) any sale, lease, exchange or other transfer (in one transaction or a
       series of transactions contemplated or arranged by any party as a single
       plan) of all or substantially all of the assets of the Company or (C) any
       plan or proposal for the liquidation or dissolution of the Company.

       Notwithstanding the foregoing, following consummation of the IPO a
"Change of Control" shall not be deemed to have occurred for purposes of the
foregoing clause (a) solely as the result of an acquisition of securities by the
Company which, by reducing the number of shares of Common Stock or other Voting
Securities outstanding, increases the proportionate number of shares
beneficially owned by any person to twenty-five percent (25%) or more of either
(A) the combined voting power of all of the then outstanding Voting Securities
or (B) Common Stock; PROVIDED, HOWEVER, that if any person referred to in this
sentence (other than by a person who holds, as of the Effective Date, directly
or indirectly securities of the Company representing twenty percent (20%) or
more of either (x) the combined voting power of the Company's then outstanding
Voting Securities or (y) the then outstanding shares of Company's Common Stock)
shall thereafter become the beneficial owner of any additional shares of Voting
Securities or Common Stock (other than pursuant to a stock split, stock
dividend, or similar transaction or as a result of an acquisition of securities
directly from the Company) and immediately thereafter beneficially owns
twenty-five percent (25%) or more of either (A) the combined voting power of all
of the then outstanding Voting Securities or (B) Common Stock, then a "Change of
Control" shall be deemed to have occurred for purposes of the foregoing clause
(a). In the event that the agreements or plans governing any of Executive's
stock-based grants and awards include and use a definition of "Change of
Control", the definition of Change of Control above shall supercede and apply in
place of any such definition in the applicable agreement and/or plan with
respect to Executive's applicable stock-based grants and awards.

7.     STOCK-BASED GRANTS AND AWARDS. All of the Executive's stock-based grants
and awards will continue to vest during any time of Executive's incapacity due
to physical or mental illness or during any time that the Executive is on leave
from the Company pursuant to the federal Family and Medical Leave Act of 1993,
as amended.

8.     NOTICE. For purposes of this Agreement, notices and all other
communications provided for in the Agreement shall be in writing and shall be
deemed to have been duly given when delivered or mailed by United States
certified mail, return receipt requested, postage prepaid, addressed as follows:

       if to the Executive:

              At his home address as shown
              in the Company's personnel records;

                                       11
<Page>

       if to the Company:

              Optium Corporation
              500 Horizon Drive, Suite 505
              Chalfont, PA 18914
              Attention: Board of Directors

or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
be effective only upon receipt.

9.     SUCCESSOR TO COMPANY. The Company shall require any successor (whether
direct or indirect, by purchase, merger, consolidation or otherwise) to all or
substantially all of the business or assets of the Company expressly to assume
and agree to perform this Agreement to the same extent that the Company would be
required to perform it if no succession had taken place. Failure of the Company
to obtain an assumption of this Agreement at or prior to the effectiveness of
any succession shall be a breach of this Agreement and shall constitute
Constructive Termination if the Executive elects to terminate employment.

10.    MISCELLANEOUS. No provisions of this Agreement may be modified, waived,
or discharged unless such waiver, modification, or discharge is agreed to in
writing and signed by Executive and such officer of the Company as may be
specifically designated by the Board. No waiver by either party hereto of, or
compliance with, any condition or provision of this Agreement to be performed by
such other party shall be deemed a waiver of similar or dissimilar provisions or
conditions at the same or at any prior or subsequent time. This Agreement
replaces and supercedes in its entirety the Employment Agreement (other than
Sections 7, 8 and 9 thereof, which are continued in the form of the applicable
portions of the Employee Agreement) between the Executive and Company dated as
of March 19, 2001, as amended, which prior Employment Agreement is null and
void. No agreements or representations, oral or otherwise, express or implied,
unless specifically referred to herein, with respect to the subject matter
hereof have been made by either party which are not set forth (or in the case of
the Employee Agreement, referenced) expressly in this Agreement. The validity,
interpretation, construction, and performance of this Agreement shall be
governed by the laws of the Commonwealth of Pennsylvania (without regard to
principles of conflicts of laws).

11.    VALIDITY. The invalidity or unenforceability of any provision or
provisions of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement, which shall remain in full force and
effect. The invalid portion of this Agreement, if any, shall be modified by any
court having jurisdiction to the extent necessary to render such portion
enforceable.

12.    COUNTERPARTS. This Agreement may be executed in several counterparts,
each of which shall be deemed to be an original but all of which together will
constitute one and the same instrument.

13.    ARBITRATION; OTHER DISPUTES. In the event of any dispute or controversy
arising under or in connection with this Agreement, the parties shall first
promptly try in good faith to settle such dispute or controversy by mediation
under the applicable rules of the American Arbitration

                                       12
<Page>

Association before resorting to arbitration. In the event such dispute or
controversy remains unresolved in whole or in part for a period of thirty (30)
days after it arises, the parties will settle any remaining dispute or
controversy exclusively by arbitration in Philadelphia, Pennsylvania, in
accordance with the rules of the American Arbitration Association then in
effect. Judgment may be entered on the arbitrator's award in any court having
jurisdiction. Notwithstanding the above, the Company shall be entitled to such a
restraining order or injunction in any court of competent jurisdiction to
prevent any violation of the Employee Agreement. Furthermore, should a dispute
occur concerning Executive's mental or physical capacity as described in
Subparagraph 4(b), 4(c) or 5(b), a doctor selected by Executive and a doctor
selected by the Company shall be entitled to examine Executive. If the opinion
of the Company's doctor and Executive's doctor conflict, the Company's doctor
and Executive's doctor shall together agree upon a third doctor, whose opinion
shall be binding.

14.    THIRD-PARTY AGREEMENTS AND RIGHTS. Executive represents to the Company
that Executive's execution of this Agreement, Executive's employment with the
Company and the performance of Executive's proposed duties for the Company will
not violate any obligations Executive may have to any employer or other party,
and Executive will not bring to the premises of the Company any copies or other
tangible embodiments of non-public information belonging to or obtained from any
such previous employment or other party.

15.    LITIGATION AND REGULATORY COOPERATION. During and after Executive's
employment, Executive shall reasonably cooperate with the Company in the defense
or prosecution of any claims or actions now in existence or which may be brought
in the future against or on behalf of the Company which relate to events or
occurrences that transpired while Executive was employed by the Company;
provided, however, that such cooperation shall not materially and adversely
affect Executive or expose Executive to an increased probability of civil or
criminal litigation. Executive's cooperation in connection with such claims or
actions shall include, but not be limited to, being available to meet with
counsel to prepare for discovery or trial and to act as a witness on behalf of
the Company at mutually convenient times. During and after Executive's
employment, Executive also shall cooperate fully with the Company in connection
with any investigation or review of any federal, state or local regulatory
authority as any such investigation or review relates to events or occurrences
that transpired while Executive was employed by the Company. The Company shall
also provide Executive with compensation on an hourly basis (to be derived from
the sum of his Base Compensation and Average Incentive Compensation) for
requested litigation and regulatory cooperation that occurs after his
termination of employment, and reimburse Executive for all costs and expenses
incurred in connection with his performance under this Paragraph 15, including,
but not limited to, reasonable attorneys' fees and costs.

16.    GENDER NEUTRAL. Wherever used herein, a pronoun in the masculine gender
shall be considered as including the feminine gender unless the context clearly
indicates otherwise.

       IN WITNESS WHEREOF, the parties have executed this Agreement effective on
the date and year first above written.

                                                 OPTIUM CORPORATION

                                       13
<Page>

                                   By:  /s/ Eitan Gertel
                                        ------------------------------------
                                   Its: CEO
                                        ------------------------------------

                                   EXECUTIVE

                                   /s/ Eitan Gertel
                                   -----------------------------------------
                                   Eitan Gertel

                                       14<Page>

                                                                   Exhibit 10.18

                         EXECUTIVE EMPLOYMENT AGREEMENT

      This EXECUTIVE EMPLOYMENT AGREEMENT ("Agreement") is made as of the 14th
day of April, 2006, between Optium Corporation, a Delaware corporation (the
"Company"), and Mark Colyer ("Executive").

      WHEREAS, the Company desires to employ Executive and Executive desires to
be employed by the Company on the terms contained herein; and

      WHEREAS Executive has or in simultaneously entering into the Company's
Employee Agreement Regarding Inventions, Confidentiality and Non-Competition
(the "Employee Agreement").

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

1.    EMPLOYMENT. The term of this Agreement shall extend from the date hereof
(the "Commencement Date") until the second anniversary of the Commencement Date;
provided, however, that the term of this Agreement shall automatically be
extended for one additional year on the second anniversary of the Commencement
Date and each anniversary thereafter unless, not less than 90 days prior to each
such date, either party shall have given notice to the other that it does not
wish to extend this Agreement; provided, further, that if a Change in Control
occurs during the original or extended term of this Agreement, the term of this
Agreement shall continue in effect for a period of not less than twelve (12)
months beyond the month in which the Change in Control occurred. The term of
this Agreement shall be subject to termination as provided in Paragraph 6 and
may be referred to herein as the "Period of Employment."

2.    POSITION AND DUTIES. During the Period of Employment, Executive shall have
the title of Senior Vice President and General Manager of the Company or such
other title as determined by the Board of Directors of the Company (the "Board")
or Chief Executive Officer, and shall have such powers and duties as may from
time to time be prescribed by the Board, Chief Executive Officer or other
authorized executive. Executive shall devote his full working time and efforts
to the business and affairs of the Company. Notwithstanding the foregoing,
Executive may serve on other boards of directors, with the approval of the
Board, or engage in religious, charitable or other community activities as long
as such services and activities are disclosed to the Board and do not materially
interfere with Executive's performance of his duties to the Company as provided
in this Agreement.

3.    COMPENSATION AND RELATED MATTERS.

      (a)    BASE SALARY AND INCENTIVE COMPENSATION. Executive's initial annual
base salary shall be $190,000. Executive's base salary shall be redetermined
annually by the Board or a Committee thereof; provided, that following a Change
in Control (as defined below), Executive's base salary may not be reduced except
for across-the-board reductions similarly affecting all or substantially all
management employees. The base salary in effect at any given time is referred to
herein as "Base Salary." The Base Salary shall be payable in substantially equal
bi-weekly

<Page>

installments. In addition to Base Salary, Executive shall be eligible to receive
cash incentive compensation as determined by the Board or a Committee thereof
from time to time, and shall also be eligible to participate in such incentive
compensation plans as the Board or a Committee thereof shall determine from time
to time for employees of the same status within the hierarchy of the Company.

      (b)    EXPENSES. Executive shall be entitled to receive prompt
reimbursement for all reasonable expenses incurred by him in performing services
hereunder during the Period of Employment, in accordance with the policies and
procedures then in effect and established by the Company for its senior
executive officers.

      (c)    OTHER BENEFITS. During the Period of Employment, Executive shall be
entitled to participate in or receive benefits under all of the Company's
Employee Benefit Plans in effect for all executive level personnel or applicable
generally to employees of the Company from time to time, subject to the terms
and conditions of such plans. As used herein, the term "Employee Benefit Plans"
includes, without limitation, each pension and retirement plan; supplemental
pension, retirement and deferred compensation plan; savings and profit-sharing
plan; stock ownership plan; stock purchase plan; stock option plan; life
insurance plan; medical insurance plan; disability plan; and health and accident
plan or arrangement established and maintained by the Company on the date hereof
for employees of the same status within the hierarchy of the Company. To the
extent that the scope or nature of benefits described in this section is
determined under the policies of the Company based in whole or in part on the
seniority of an employee's service, Executive shall be deemed to have seniority
with the Company equal to the actual time of Executive's service with the
Company. During the Period of Employment, Executive shall be entitled to
participate in or receive benefits under any employee benefit plan or
arrangement which may, in the future, be made available by the Company to its
executives and key management employees, subject to and on a basis consistent
with the terms, conditions and overall administration of such plan or
arrangement. Any payments or benefits payable to Executive under a plan or
arrangement referred to in this Subparagraph 3(c) in respect of any calendar
year during which Executive is employed by the Company for less than the whole
of such year shall, unless otherwise provided in the applicable plan or
arrangement, be prorated in accordance with the number of days in such calendar
year during which he is so employed. Should any such payments or benefits accrue
on a fiscal (rather than calendar) year, then the proration in the preceding
sentence shall be on the basis of a fiscal year rather than calendar year.

      (d)    PAID TIME OFF. Executive shall be entitled to twenty (20) days of
paid time off in each calendar year usuable in accordance with the Company's
policies, which shall be accrued ratably during the calendar year. Executive
shall also be entitled to all paid holidays given by the Company to its
executives. To the extent that the scope or nature of benefits described in this
section are determined under the policies of the Company based in whole or in
part on the seniority or tenure of an employee's service, Executive shall be
deemed to have a tenure with the Company equal to the actual time of Executive's
service with Company.

4.    TERMINATION. Executive's employment hereunder may be terminated without
any breach of this Agreement under the following circumstances:

      (a)    DEATH. Executive's employment hereunder shall terminate upon his
death.

                                        2
<Page>

      (b)    DISABILITY. If, as a result of Executive's incapacity due to
physical or mental illness, Executive shall have been absent from his duties
hereunder on a full-time basis for one hundred eighty (180) calendar days in the
aggregate in any twelve (12) month period, the Company may terminate Executive's
employment hereunder.

      (c)    TERMINATION BY COMPANY FOR CAUSE. At any time during the Period of
Employment, the Company may terminate Executive's employment hereunder for Cause
if such termination is approved by the Chief Executive Officer or not less than
a majority of the Board at a meeting of the Board called and held for such
purpose. For purposes of this Agreement, "Cause" shall mean: (A) conduct by
Executive constituting a material act of willful misconduct in connection with
the performance of his duties, including, without limitation, misappropriation
of funds or property of the Company or any of its affiliates other than the
occasional, customary and de minimis use of Company property for personal
purposes; (B) criminal or civil conviction or indictment of Executive, a plea of
nolo contendere by Executive or conduct by Executive that would reasonably be
expected to result in material injury to the reputation of the Company if he
were retained in his position with the Company, including, without limitation,
conviction or indictment of a felony involving moral turpitude; (C) continued,
willful and deliberate non-performance by Executive of his duties hereunder
(other than by reason of Executive's physical or mental illness, incapacity or
disability) which has continued for more than thirty (30) days following written
notice of such non-performance from the Chief Executive Officer or the Board;
(D) a breach by Executive of any of the material provisions of the Executive's
Employee Agreement regarding Inventions, Confidentiality and Non-Competition
(the "Employee Agreement") which is not or cannot be cured within ten (10) days
following written notice of such breach from the Chief Executive Officer or the
Board; or (E) a material violation by Executive of the Company's employment
policies which has continued following written notice of such violation from the
Chief Executive Officer or the Board. In the event that the agreements or plans
governing any of Executive's stock-based grants and awards include and use a
definition of "Cause", the definition of Cause above shall supercede and apply
in place of any such definition in the applicable agreement and/or plan with
respect to Executive's applicable stock-based grants and awards.

      (d)    TERMINATION WITHOUT CAUSE. At any time during the Period of
Employment, the Company may terminate Executive's employment hereunder without
Cause if such termination is approved by the Board at a meeting of the Board
called and held for such purpose. Any termination by the Company of Executive's
employment under this Agreement which does not constitute a termination for
Cause under Subparagraph 4(c) or result from the death or disability of the
Executive under Subparagraph 4(a) or (b) shall be deemed a termination without
Cause. If the Company provides notice to Executive under Paragraph 1 that it
does not wish to extend the Period of Employment, such action shall be deemed a
termination without Cause.

      (e)    TERMINATION BY EXECUTIVE. At any time during the Period of
Employment, Executive may terminate his employment hereunder for any reason;
PROVIDED, that Executive may terminate his employment for Constructive
Termination only within twelve (12) months after the occurrence of the first
event constituting a Change in Control. If Executive provides notice to the
Company under Paragraph 1 that he does not wish to extend the Period of
Employment, such action shall be deemed a voluntary termination by Executive and
one without Constructive Termination. For purposes of this Agreement,
"Constructive Termination" shall

                                        3
<Page>

mean that Executive has complied with the "Constructive Termination Process"
(hereinafter defined) following the occurrence of any of the following events
within twelve (12) months after the occurrence of the first event constituting a
Change in Control: (A) a substantial diminution or other substantive adverse
change, not consented to by Executive, in the nature or scope of Executive's
responsibilities, authorities, powers, functions or duties other than to reflect
the integration of the Company into any acquiring entity; (B) an involuntary
reduction in Executive's Base Salary except for across-the-board reductions
similarly affecting all or substantially all management employees; (C) a breach
by the Company of any of its other material obligations under this Agreement and
the failure of the Company to cure such breach within thirty (30) days after
written notice thereof by Executive; (D) the involuntary relocation of the
Company's offices at which Executive is principally employed to a location more
than thirty (30) miles from such offices, or the requirement by the Company that
Executive be based anywhere other than the Company's offices at such location on
an extended basis, except for required travel on the Company's business to an
extent substantially consistent with Executive's business travel obligations; or
(E) the failure of the Company to obtain the agreement from any successor to the
Company to assume and agree to perform this Agreement as required by Paragraph
8. "Constructive Termination Process" shall mean that (i) Executive reasonably
determines in good faith that a "Constructive Termination" event has occurred;
(ii) Executive notifies the Company in writing of the occurrence of the
Constructive Termination event; (iii) Executive cooperates in good faith with
the Company's efforts, for a period not less than sixty (60) days following such
notice, to modify Executive's employment situation in a manner acceptable to
Executive and Company; and (iv) notwithstanding such efforts, one or more of the
Constructive Termination events continues to exist and has not been modified in
a manner acceptable to Executive. If the Company cures the Constructive
Termination event in a manner acceptable to Executive during the sixty (60) day
period, Constructive Termination shall be deemed not to have occurred. In the
event that the agreements or plans governing any of Executive's stock-based
grants and awards include and use a definition of "Constructive Termination",
the definition of Constructive Termination above shall supercede and apply in
place of any such definition in the applicable agreement and/or plan with
respect to Executive's applicable stock-based grants and awards.

      (f)    NOTICE OF TERMINATION. Except for termination as specified in
Subparagraph 4(a), any termination of Executive's employment by the Company or
any such termination by Executive shall be communicated by written Notice of
Termination to the other party hereto. For purposes of this Agreement, a "Notice
of Termination" shall mean a notice which shall indicate the specific
termination provision in this Agreement relied upon.

      (g)    DATE OF TERMINATION. "Date of Termination" shall mean: (A) if
Executive's employment is terminated by his death, the date of his death; (B) if
Executive's employment is terminated on account of disability under Subparagraph
4(b) or by the Company for Cause under Subparagraph 4(c), the date on which
Notice of Termination is given; (C) if Executive's employment is terminated by
the Company under Subparagraph 4(d), sixty (60) days after the date on which a
Notice of Termination is given; and (D) if Executive's employment is terminated
by Executive under Subparagraph 4(e), thirty (30) days after the date on which a
Notice of Termination is given.

                                        4
<Page>

5.    COMPENSATION UPON TERMINATION OR DURING DISABILITY.

      (a)    If Executive's employment terminates by reason of his death, the
Company shall, within ninety (90) days of death, pay in a lump sum amount to
such person as Executive shall designate in a notice filed with the Company or,
if no such person is designated, to Executive's estate, Executive's accrued and
unpaid Base Salary to the date of his death, plus his accrued and unpaid
incentive compensation, if any, under Subparagraph 3(a), plus his unused paid
time off. All stock-based grants and awards held by Executive shall be treated
upon the death of the Executive in accordance with their terms. For a period of
one (1) year following the Date of Termination, the Company shall pay such
health insurance premiums as may be necessary to allow Executive's spouse and
dependents to receive health insurance coverage substantially similar to
coverage they received prior to the Date of Termination. In addition to the
foregoing, any payments to which Executive's spouse, beneficiaries, or estate
may be entitled under any employee benefit plan shall also be paid in accordance
with the terms of such plan or arrangement. Such payments, in the aggregate,
shall fully discharge the Company's obligations hereunder.

      (b)    During any period that Executive fails to perform his duties
hereunder as a result of incapacity due to physical or mental illness, Executive
shall continue to receive his accrued and unpaid Base Salary and accrued and
unpaid incentive compensation, if any, under Subparagraph 3(a), until
Executive's employment is terminated due to disability in accordance with
Subparagraph 4(b) or until Executive terminates his employment in accordance
with Subparagraph 4(e), whichever first occurs. All stock-based grants and
awards held by Executive shall be treated upon the Date of Termination in
accordance with their terms. For a period of one (1) year following the Date of
Termination, the Company shall pay such health insurance premiums as may be
necessary to allow Executive and Executive's spouse and dependents to receive
health insurance coverage substantially similar to coverage they received prior
to the Date of Termination. Upon termination due to death prior to the
termination first to occur as specified in the preceding sentence, Subparagraph
5(a) shall apply.

      (c)    If Executive's employment is terminated by Executive other than for
Constructive Termination as provided in Subparagraph 4(e), then the Company
shall, through the Date of Termination, pay Executive his accrued and unpaid
Base Salary at the rate in effect at the time Notice of Termination is given,
plus his unused paid time off. Thereafter, the Company shall have no further
obligations to Executive except as otherwise expressly provided under this
Agreement, provided any such termination shall not adversely affect or alter
Executive's rights under any employee benefit plan of the Company in which
Executive, at the Date of Termination, has a vested interest, unless otherwise
provided in such employee benefit plan or any agreement or other instrument
attendant thereto. All stock-based grants and awards held by Executive shall be
treated upon the Date of Termination in accordance with their terms.

      (d)    If Executive's employment is terminated by the Company without
Cause as provided in Subparagraph 4(d), then the Company shall, through the Date
of Termination, pay Executive his accrued and unpaid Base Salary at the rate in
effect at the time Notice of Termination is given and his accrued and unpaid
incentive compensation, if any, under Subparagraph 3(a), plus his unused paid
time off. In addition, subject to signing by Executive of a general mutual
release of claims in a form and manner satisfactory to the Company,

                                        5
<Page>

             (i)      the Company shall pay Executive an amount equal to one (1)
      times the sum of Executive's current Base Salary and his Average Incentive
      Compensation (the "Severance Amount"). The Severance Amount shall be paid
      out in substantially equal bi-weekly installments over twelve (12) months,
      in arrears. For purposes of this Agreement, "Average Incentive
      Compensation" shall mean the average of the annual incentive compensation
      under Subparagraph 3(a) received by Executive for the three (3)
      immediately preceding fiscal years or such fewer number of complete fiscal
      years as Executive may have been employed by the Company. In no event
      shall "Average Incentive Compensation" include any sign-on bonus,
      retention bonus or any other special bonus. Notwithstanding the foregoing,
      if the Executive breaches any of the material provisions contained in the
      Employee Agreement, all payments of the Severance Amount shall immediately
      cease; and

             (ii)     in addition to any other benefits to which Executive may
      be entitled in accordance with the Company's then existing severance
      policies, the Company shall, for a period of one (1) year commencing on
      the Date of Termination, pay such health insurance premiums as may be
      necessary to allow Executive and Executive's spouse and dependents to
      continue to receive health insurance coverage.

      (e)    If Executive's employment is terminated by the Company for Cause as
provided in Subparagraph 4(c), then the Company shall, through the Date of
Termination, pay Executive his accrued and unpaid Base Salary at the rate in
effect at the time Notice of Termination is given, plus his unused paid time
off. Thereafter, the Company shall have no further obligations to Executive
except as otherwise expressly provided under this Agreement, provided any such
termination shall not adversely affect or alter Executive's rights under any
employee benefit plan of the Company in which Executive, at the Date of
Termination, has a vested interest, unless otherwise provided in such employee
benefit plan or any agreement or other instrument attendant thereto. All
stock-based grants and awards held by Executive shall be treated upon the Date
of Termination in accordance with their terms.

      (f)    Nothing contained in the foregoing Subparagraphs 5(a) through 5(e)
shall be construed so as to affect Executive's rights or the Company's
obligations relating to agreements or benefits which are unrelated to
termination of employment.

6.    CHANGE IN CONTROL PAYMENT. The provisions of this Paragraph 6 set forth
certain terms of an agreement reached between Executive and the Company
regarding Executive's rights and obligations upon the occurrence of a Change in
Control of the Company. These provisions are intended to assure and encourage in
advance Executive's continued attention and dedication to his assigned duties
and his objectivity during the pendency and after the occurrence of any such
event. These provisions shall apply in lieu of, and expressly supersede, the
provisions of Subparagraph 5(d)(i) regarding severance pay upon a termination of
employment, if such termination of employment occurs within twelve (12) months
after the occurrence of the first event constituting a Change of Control,
provided that such first event occurs during the Period of Employment. These
provisions shall terminate and be of no further force or effect beginning twelve
(12) months after the occurrence of a Change of Control.

                                        6
<Page>

      (a)    CHANGE IN CONTROL.

             (i)      If within twelve (12) months after the occurrence of the
      first event constituting a Change in Control, Executive's employment is
      terminated by the Company without Cause as provided in Subparagraph 4(d)
      or Executive terminates his employment for Constructive Termination as
      provided in Subparagraph 4(e), then the Company shall pay Executive a lump
      sum in cash in an amount equal to his unused paid time off, plus one (1)
      times the sum of (A) Executive's current Base Salary plus (B) Executive's
      most recent annual incentive compensation under Subparagraph 3(a) for the
      most recent fiscal year, excluding any sign-on bonus, retention bonus or
      any other special bonus;

             (ii)     Executive shall be entitled to any rights and benefits
      with respect to stock-related awards, to the extent and upon the terms
      provided in the applicable incentive agreement or any agreement or other
      instrument attendant thereto pursuant to which such options or awards were
      granted; and

             (iii)    The Company shall, for a period of one (1) year commencing
      on the Date of Termination, pay such health insurance premiums as may be
      necessary to allow Executive, Executive's spouse and dependents to
      continue to receive health insurance coverage substantially similar to the
      coverage they received prior to the Date of Termination.

      (b)    DEFINITIONS. For purposes of this Paragraph 6, the following terms
shall have the following meanings:

      Prior to the consummation of the Company's initial public offering of its
common stock pursuant to an effective registration statement under the
Securities Act of 1933, as amended (the "IPO"), "Change of Control" shall have
the meaning ascribed to such term in the Company's 2000 Stock Incentive Plan, as
amended. Thereafter, "Change in Control" shall mean any of the following:

             (i)      any "person," as such term is used in Sections 13(d) and
      14(d) of the Securities Exchange Act of 1934, as amended (the "Act")
      (other than the Company, any of its subsidiaries, or any trustee,
      fiduciary or other person or entity holding securities under any employee
      benefit plan or trust of the Company or any of its subsidiaries), together
      with all "affiliates" and "associates" (as such terms are defined in Rule
      12b-2 under the Act) of such person, shall acquire (as such term is
      defined in Rule 13d-3 under the Act), directly or indirectly, securities
      of the Company representing twenty-five percent (25%) or more of either
      (A) the combined voting power of the Company's then outstanding securities
      having the right to vote in an election of the Company's Board ("Voting
      Securities") or (B) the then outstanding shares of Company's common stock,
      par value $0.0001 per share ("Common Stock") (other than by a person who
      holds, as of the Effective Date, directly or indirectly securities of the
      Company representing twenty percent (20%) or more of either (A) the
      combined voting power of the Company's then outstanding Voting Securities
      or (B) the then outstanding shares of Company's Common Stock); or

                                        7
<Page>

             (ii)     persons who, as of the Commencement Date, constitute the
      Company's Board (the "Incumbent Directors") cease for any reason,
      including, without limitation, as a result of a tender offer, proxy
      contest, merger or similar transaction, to constitute at least a
      majority of the Board, provided that any person becoming a director
      of the Company subsequent to the Commencement Date shall be
      considered an Incumbent Director if such person's election was
      approved by or such person was nominated for election by a vote of
      at least a majority of the Incumbent Directors then constituting
      the Board or the nominating committee thereof; but provided
      further, that any such person whose initial assumption of office is
      in connection with an actual or threatened election contest
      relating to the election of members of the Board or other actual or
      threatened solicitation of proxies or consents by or on behalf of a
      person other than the Board, including by reason of agreement
      intended to avoid or settle any such actual or threatened contest
      or solicitation, shall not be considered an Incumbent Director; or

             (iii)    the stockholders of the Company shall approve (A) any
      consolidation or merger of the Company where the stockholders of the
      Company, immediately prior to the consolidation or merger, would not,
      immediately after the consolidation or merger, beneficially own (as such
      term is defined in Rule 13d-3 under the Act), directly or indirectly,
      shares representing in the aggregate more than fifty percent (50%) of the
      voting shares of the Company issuing cash or securities in the
      consolidation or merger (or of its ultimate parent corporation, if any),
      (B) any sale, lease, exchange or other transfer (in one transaction or a
      series of transactions contemplated or arranged by any party as a single
      plan) of all or substantially all of the assets of the Company or (C) any
      plan or proposal for the liquidation or dissolution of the Company.

      Notwithstanding the foregoing, following consummation of the IPO a "Change
of Control" shall not be deemed to have occurred for purposes of the foregoing
clause (a) solely as the result of an acquisition of securities by the Company
which, by reducing the number of shares of Common Stock or other Voting
Securities outstanding, increases the proportionate number of shares
beneficially owned by any person to twenty-five percent (25%) or more of either
(A) the combined voting power of all of the then outstanding Voting Securities
or (B) Common Stock; PROVIDED, HOWEVER, that if any person referred to in this
sentence (other than by a person who holds, as of the Effective Date, directly
or indirectly securities of the Company representing twenty percent (20%) or
more of either (x) the combined voting power of the Company's then outstanding
Voting Securities or (y) the then outstanding shares of Company's Common Stock)
shall thereafter become the beneficial owner of any additional shares of Voting
Securities or Common Stock (other than pursuant to a stock split, stock
dividend, or similar transaction or as a result of an acquisition of securities
directly from the Company) and immediately thereafter beneficially owns
twenty-five percent (25%) or more of either (A) the combined voting power of all
of the then outstanding Voting Securities or (B) Common Stock, then a "Change of
Control" shall be deemed to have occurred for purposes of the foregoing clause
(a). In the event that the agreements or plans governing any of Executive's
stock-based grants and awards include and use a definition of "Change of
Control", the definition of Change of Control above shall supercede and apply in
place of any such definition in the applicable agreement and/or plan with
respect to Executive's applicable stock-based grants and awards.

                                        8
<Page>

7.    NOTICE. For purposes of this Agreement, notices and all other
communications provided for in the Agreement shall be in writing and shall be
deemed to have been duly given when delivered or mailed by United States
certified mail, return receipt requested, postage prepaid, addressed as follows:

      if to the Executive:

              At his home address as shown in the Company's personnel
              records;

      if to the Company:

              Optium Corporation
              500 Horizon Drive, Suite 505
              Chalfont, PA 18914
              Attention:  Chief Executive Officer

or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
be effective only upon receipt.

8.    SUCCESSOR TO COMPANY. The Company shall require any successor (whether
direct or indirect, by purchase, merger, consolidation or otherwise) to all or
substantially all of the business or assets of the Company expressly to assume
and agree to perform this Agreement to the same extent that the Company would be
required to perform it if no succession had taken place. Failure of the Company
to obtain an assumption of this Agreement at or prior to the effectiveness of
any succession shall be a breach of this Agreement and shall constitute
Constructive Termination if the Executive elects to terminate employment.

9.    MISCELLANEOUS. No provisions of this Agreement may be modified, waived, or
discharged unless such waiver, modification, or discharge is agreed to in
writing and signed by Executive and such officer of the Company as may be
specifically designated by the Board. No waiver by either party hereto of, or
compliance with, any condition or provision of this Agreement to be performed by
such other party shall be deemed a waiver of similar or dissimilar provisions or
conditions at the same or at any prior or subsequent time. This Agreement
replaces and supercedes in its entirety the Employment Agreement (other than
Sections 7, 8 and 9 thereof, which obligations are continued in the form of the
applicable portions of the Employee Agreement) between the Executive and Company
dated as of April, 16, 2001, as amended, which prior Employment Agreement is
null and void. No agreements or representations, oral or otherwise, express or
implied, unless specifically referred to herein, with respect to the subject
matter hereof have been made by either party which are not set forth (or in the
case of the Employee Agreement, referenced) expressly in this Agreement. The
validity, interpretation, construction, and performance of this Agreement shall
be governed by the laws of the Commonwealth of Pennsylvania (without regard to
principles of conflicts of laws).

10.   VALIDITY. The invalidity or unenforceability of any provision or
provisions of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement, which shall remain in full force and
effect. The invalid portion of this Agreement, if

                                        9
<Page>

any, shall be modified by any court having jurisdiction to the extent necessary
to render such portion enforceable.

11.   COUNTERPARTS. This Agreement may be executed in several counterparts, each
of which shall be deemed to be an original but all of which together will
constitute one and the same instrument.

12.   ARBITRATION; OTHER DISPUTES. In the event of any dispute or controversy
arising under or in connection with this Agreement, the parties shall first
promptly try in good faith to settle such dispute or controversy by mediation
under the applicable rules of the American Arbitration Association before
resorting to arbitration. In the event such dispute or controversy remains
unresolved in whole or in part for a period of thirty (30) days after it arises,
the parties will settle any remaining dispute or controversy exclusively by
arbitration in Philadelphia, Pennsylvania, in accordance with the rules of the
American Arbitration Association then in effect. Judgment may be entered on the
arbitrator's award in any court having jurisdiction. Notwithstanding the above,
the Company shall be entitled to such a restraining order or injunction in any
court of competent jurisdiction to prevent any violation of the Employee
Agreement. Furthermore, should a dispute occur concerning Executive's mental or
physical capacity as described in Subparagraph 4(b), 4(c) or 5(b), a doctor
selected by Executive and a doctor selected by the Company shall be entitled to
examine Executive. If the opinion of the Company's doctor and Executive's doctor
conflict, the Company's doctor and Executive's doctor shall together agree upon
a third doctor, whose opinion shall be binding.

13.   THIRD-PARTY AGREEMENTS AND RIGHTS. Executive represents to the Company
that Executive's execution of this Agreement, Executive's employment with the
Company and the performance of Executive's proposed duties for the Company will
not violate any obligations Executive may have to any employer or other party,
and Executive will not bring to the premises of the Company any copies or other
tangible embodiments of non-public information belonging to or obtained from any
such previous employment or other party.

14.   LITIGATION AND REGULATORY COOPERATION. During and after Executive's
employment, Executive shall reasonably cooperate with the Company in the defense
or prosecution of any claims or actions now in existence or which may be brought
in the future against or on behalf of the Company which relate to events or
occurrences that transpired while Executive was employed by the Company;
provided, however, that such cooperation shall not materially and adversely
affect Executive or expose Executive to an increased probability of civil or
criminal litigation. Executive's cooperation in connection with such claims or
actions shall include, but not be limited to, being available to meet with
counsel to prepare for discovery or trial and to act as a witness on behalf of
the Company at mutually convenient times. During and after Executive's
employment, Executive also shall cooperate fully with the Company in connection
with any investigation or review of any federal, state or local regulatory
authority as any such investigation or review relates to events or occurrences
that transpired while Executive was employed by the Company. The Company shall
also provide Executive with compensation on an hourly basis (to be derived from
the sum of his Base Compensation and Average Incentive Compensation) for
requested litigation and regulatory cooperation that occurs after his
termination of employment, and reimburse Executive for all costs and expenses
incurred in

                                       10
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connection with his performance under this Paragraph 14, including, but not
limited to, reasonable attorneys' fees and costs.

15.   GENDER NEUTRAL. Wherever used herein, a pronoun in the masculine gender
shall be considered as including the feminine gender unless the context clearly
indicates otherwise.

      IN WITNESS WHEREOF, the parties have executed this Agreement effective on
the date and year first above written.

                                         OPTIUM CORPORATION

                                         By:  /s/ Eitan Gertel
                                              ---------------------------------
                                         Its: CEO
                                              ---------------------------------

                                         EXECUTIVE

                                         /s/ Mark Colyer
                                         --------------------------------------
                                         Name:  Mark Colyer

                                       11

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