EMPLOYMENT AGREEMENT

     THIS AGREEMENT is made and entered into by and between INPUT/OUTPUT, INC.
(the "Company"), having a business address at 11104 West Airport Boulevard,
Stafford, Texas 77477-3016, and W. J. Zeringue ("Executive"), having a mailing
address at 7930 State Highway 6, Missouri City, Texas 77459.

     WHEREAS, the Company wishes to employ the Executive and to assure itself of
the services of the Executive for the period provided in this Agreement, and the
Executive wishes to be employed by the Company for such period on the terms and
conditions hereinafter provided.

     NOW, THEREFORE, in consideration of the premises and the mutual covenants
herein contained, the Company and the Executive hereby agree as follows:

     1.   EMPLOYMENT.  Upon the terms and subject to the conditions contained in
this Agreement, the Executive agrees to provide services as provided herein for
the Company during the term of this Agreement.  The Executive agrees to devote
his best efforts to the business of the Company, and shall perform his duties in
a diligent and business-like manner, all for the purpose of advancing the
business of the Company.

     2.   DUTIES.  The duties of the Executive shall be those duties which can
reasonably be expected to be performed by a person with the titles of Chairman
of the Board, President and Chief Executive Officer of Input/Output, Inc.  The
Executive shall report directly to the Board of Directors of the Company.

     3.   EMPLOYMENT TERM.  Subject to the terms and conditions hereof, the
Company agrees to employ the Executive for a term commencing as of January 1,
1998 (the "Effective Date") and continuing until December 31, 1998 (the "Primary
Term"), unless renewed in accordance with this SECTION 3.  Beginning December
31, 1998, this Agreement shall be automatically renewed for successive one-year
terms, unless either the Company or the Executive provides written notice of
election not to renew, at least 60 days before the applicable renewal date.

     4.   SALARY AND BENEFITS.

          (a)  BASE SALARY.  The Company shall, during the Primary Term of this
     Agreement, pay the Executive an annual base salary of $420,000 beginning on
     January 15, 1998.  Such salary shall be paid in bi-monthly installments,
     minus applicable withholding and authorized salary deductions.  The base
     salary may be reviewed and adjusted by the Board of Directors upon any
     renewal of this Agreement under SECTION 3.  The Company may not, however,
     reduce the Executive's base salary at any time during the Primary Term.



          (b)  SIGN-ON BONUS.  The Company shall pay the Executive a sign-on
     bonus of $200,000, payable on January 2, 1998.  Such amount shall be paid
     in a lump sum, less applicable withholding and authorized salary
     deductions.

          (c)  BONUS.  The Company shall pay the Executive a bonus of $400,000
     on December 31, 1998 in lieu of the Executive's right to participate in the
     Input/Output, Inc. 1996 Management Incentive Plan (the "Incentive Plan")
     for fiscal 1998.  This bonus shall be paid to the Executive irrespective of
     Company performance during 1998, and is contingent only upon the
     Executive's being employed by the Company at December 31, 1998.  The
     Executive will be eligible to participate in the Incentive Plan for awards
     based on the Plan's performance criteria for the Company's fiscal 1999.

          (d)  SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN.  The Company agrees that
     the Board will select the Executive to be a participant in the
     Input/Output, Inc. Supplemental Executive Retirement Plan or any subsequent
     supplement executive retirement plan established by the Company.

          (e)  STOCK OPTIONS.  The Executive shall be granted two stock options
     effective December 10, 1997, to purchase shares of common stock of the
     Company under the Input/Output, Inc. 1990 Stock Option Plan (the "Option
     Plan").  Both option grants will be evidenced by standard stock option
     agreements.  The first grant will provide for an option to purchase 500,000
     shares of stock under the Option Plan, having an exercise price equal to
     the fair market value of the stock on the date of grant.  This option will
     vest in equal annual installments over a four-year period beginning on the
     date of grant.  This option will have a term of ten years and will
     otherwise be subject to the standard terms and conditions of the Option
     Plan; provided, however, that the option agreement shall expressly provide
     that (i) upon the Company's termination of the Executive's employment for
     any reason other than for "Cause" (as defined in SECTION 5(c) of this
     Agreement), (A) all unvested installments of shares under such option shall
     thereupon automatically accelerate and become fully vested, and (B) the
     option shall be exercisable from the date of such termination of employment
     through that date which is the first anniversary date of such date of
     termination, and (ii) upon the occurrence of a "change of control" (as
     defined under the terms of the Option Plan as of the date hereof), all
     unvested installments of shares under such option shall thereupon
     automatically accelerate and become fully vested. 

          The second stock option grant will provide for an option to purchase
     100,000 shares of common stock under the Option Plan.  This grant will be
     100% vested on December 10, 1998, but will be exercisable commencing upon
     that date only if the fair market value per share of the common stock is at
     least equal to 120% of the exercise price (i.e., the New York Stock
     Exchange 

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     closing price of the common stock on December 10, 1997).  For the
     purpose of determining whether the option becomes exercisable beginning on
     December 10, 1998, "fair market value" will be based on the average closing
     price per share of the common stock on the 30 consecutive trading days
     prior to December 10, 1998.  If such "fair market value" of the stock on
     December 10, 1998 is not equal to at least 120% of the exercise price, then
     this option will terminate.

          (f)  RESTRICTED STOCK.  The Executive shall be granted, effective as
     of January 1, 1998, 53,000 shares of restricted stock under the terms of
     the Input/Output, Inc. 1990 Restricted Stock Plan (the "Restricted Stock
     Plan").  The restrictions on the restricted stock will lapse as to one-half
     of the restricted stock on January 1, 2000, as to an additional one-fourth
     of the restricted stock on January 1, 2001, and as to the remaining 
     one-fourth of the restricted stock on January 1, 2002; provided, however, 
     that the award agreement shall expressly provide that (i) any restrictions 
     on the restricted stock will lapse in full upon the Company's termination
     of the Executive's employment for any reason other than for "Cause" (as
     defined in SECTION 5(c) of this Agreement) and (ii) any restrictions on the
     restricted stock will lapse in full upon the occurrence of a "change of
     control" (as defined under the terms of the Restricted Stock Plan as of the
     date hereof).  The restricted stock will otherwise be subject to the terms
     and conditions under the Restricted Stock Plan. 

          (g)  REIMBURSEMENT OF EXPENSES.  The Company shall reimburse the
     Executive for all out-of-pocket expenses incurred by the Executive in the
     course of his duties, in accordance with normal Company policies.

          (h)  EMPLOYEE BENEFITS.  The Executive shall be entitled to
     participate in all employee benefit programs generally available to
     employees of the Company and to receive all normal perquisites provided to
     senior executive officers of the Company.

          (i)  BENEFITS NOT IN LIEU OF COMPENSATION.  No benefit or perquisite
     provided to the Executive shall be deemed to be in lieu of base salary,
     bonus, or other compensation.

     5.   TERMINATION OF EMPLOYMENT.  The Board of Directors of the Company may
terminate the employment of the Executive at any time as it deems appropriate.

          (a)  TERMINATION WITHOUT CAUSE.  If, during the term of this
     Agreement, the Company terminates the Executive's employment for any reason
     other than for Cause (as defined in SECTION 5(c) of this Agreement), the
     Company shall pay to the Executive an amount (the "Severance Payment")

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     equal to (i) two (2), multiplied by (ii) the average of the sum of the
     Executive's annual base salary plus annual bonus payments for the three (3)
     most recently completed fiscal years of the Company (or, in the event that
     the Executive has not been employed by the Company for three (3) fiscal
     years of the Company as of the date of his termination of employment with
     the Company, (A) two multiplied by (B) the average of the sum of the
     Executive's annual base salary plus annual bonus payments during the
     Executive's employment with the Company).  For these purposes, the bonus
     relating to any fiscal year shall be used even if that bonus is actually
     paid in a different fiscal year.  The amount of any such Severance Payment
     shall be paid in a lump sum, less applicable withholding, as soon as
     practicable following such termination.

          (b)  TERMINATION UPON A CHANGE OF CONTROL.  If, within one year
     following the date of a "Change of Control" of the Company (as defined
     below), the Company terminates the Executive's employment for any reason
     other than for "Cause" (as defined in SECTION 5(c) of this Agreement) or
     the Executive terminates employment with the Company for "Good Reason" (as
     defined below), the Company shall pay to the Executive an amount (the
     "Change of Control Payment") equal to (A) two (2), multiplied by (B) the
     average of the sum of the Executive's annual base salary plus annual bonus
     payments for the three (3) most recently completed fiscal years of the
     Company (or, in the event that the Executive has not been employed by the
     Company for three (3) fiscal years of the Company as of the date of the
     Change of Control, (X) two, multiplied by (Y) the average of the sum of the
     Executive's annual base salary plus annual bonus payments during the
     Executive's employment with the Company).  For these purposes, the bonus
     relating to any fiscal year shall be used even if that bonus is actually
     paid in a different fiscal year.  The amount of any such Change of Control
     Payment shall be paid in a lump sum, less applicable withholding, as soon
     as practicable following such termination, and shall be paid in lieu of any
     Severance Payment otherwise payable under SECTION 5(a) above.

               (i)  For purposes of this SECTION 5(b), "Good Reason" shall mean:

                    (A)  Without his express written consent, the assignment to
               Executive of any duties inconsistent with his positions, duties,
               responsibilities and status with the Company immediately prior to
               a Change of Control, or a change in his reporting
               responsibilities, titles or offices as in effect immediately
               prior to a Change of Control, or any removal of Executive from or
               any failure to re-elect Executive to any of such positions,
               except in connection with the termination of his employment for
               Cause, death, permanent and total disability (as such term is
               defined in 

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               Section 22(e)(3) of the Internal Revenue Code of 1986,as 
               amended (the "Code")) or retirement in accordance with normal
               Company policies or by Executive other than for Good Reason;

                    (B)  A reduction by the Company in Executive's base salary
               as in effect on the date of a Change of Control or as the same
               may be increased from time to time thereafter;

                    (C)  The Company's requiring Executive to be based anywhere
               other than either the Company's offices at which he was based
               immediately prior to a Change of Control or the Company's offices
               which are no more than 20 miles from the offices at which the
               Executive was based immediately prior to a Change of Control,
               except for required travel on the Company's business to an extent
               substantially consistent with his business travel obligations
               immediately prior to the Change of Control (excluding, however,
               any travel obligations prior to the Change of Control that are
               associated with or caused by the Change of Control events or
               circumstances), or, in the event Executive consents to any
               relocation beyond such 20-mile radius, the failure by the Company
               to pay (or reimburse Executive) for all reasonable moving
               expenses incurred by him relating to a change of his principal
               residence in connection with such relocation and to indemnify
               Executive against any loss (defined as the difference between the
               actual sale price of such residence and the higher of (1) his
               aggregate investment in such residence or (2) the fair market
               value of such residence as determined by a real estate appraiser
               designated by Executive and reasonably satisfactory to the
               Company) realized on the sale of Executive's principal residence
               in connection with any such change of residence; or

                    (D)  Any failure of the Company to obtain the assumption of,
               or the agreement to perform, this Agreement by any successor as
               contemplated in SECTION 7(a).

          For purposes of this SECTION 5(b)(i), any good faith determination of
          "Good Reason" made by the Executive shall be conclusive and binding on
          the parties.

               (ii) For purposes of this SECTION 5(b), a "Change of Control" of
          the Company  shall mean the occurrence of any of the following events:
          (A) there shall be consummated any merger or consolidation pursuant to
          which shares of the Company's common stock would be converted into
          cash, securities or other property, or any sale, lease, exchange or
          other 

                                      -5-


          disposition (excluding disposition by way of mortgage, pledge or
          hypothecation), in one transaction or a series of related
          transactions, of all or substantially all of the assets of the Company
          (a "Business Combination"), in each case unless, following such
          Business Combination, the holders of the outstanding common stock
          immediately prior to such Business Combination beneficially own,
          directly or indirectly, more than 51% of the outstanding common stock
          or equivalent equity interests of the corporation or entity resulting
          from such Business Combination (including, without limitation, a
          corporation which as a result of such transaction owns the Company or
          all or substantially all of the Company's assets either directly or
          through one or more subsidiaries) in substantially the same
          proportions as their ownership, immediately prior to such Business
          Combination, of the outstanding common stock of the Company, (B) the
          stockholders of the Company approve any plan or proposal for the
          complete liquidation or dissolution of the Company, (C) any "person"
          (as such term is defined in Section 3(a)(9) or Section 13(d)(3) under
          the Securities Exchange Act of 1934 (the "1934 Act")) or any "group"
          (as such term is used in Rule 13d-5 promulgated under the 1934 Act),
          other than the Company, any successor of the Company or any subsidiary
          or any employee benefit plan of the Company or any subsidiary
          (including such plan's trustee), becomes a beneficial owner for
          purposes of Rule 13d-3 promulgated under the 1934 Act, directly or
          indirectly, of securities of the Company representing 40% or more of
          the Company's then outstanding securities having the right to vote in
          the election of directors, or (D) during any period of two consecutive
          years, individuals who, at the beginning of such period constituted
          the entire Board, cease for any reason (other than death) to
          constitute a majority of the directors, unless the election, or the
          nomination for election by the Company's stockholders, of each new
          director was approved by a vote of at least a majority of the
          directors then still in office who were directors at the beginning of
          the period.

               (iii)  Notwithstanding anything in this Agreement to the
          contrary, the total present value of all change of control payments
          (i.e., "parachute payments," as defined under Section 280G of the
          Code) payable to the Executive or for the Executive's benefit, whether
          payable under this Agreement or any other arrangements with the
          Company, shall be limited to three times the Executive's base amount
          less one dollar and, to the extent necessary, the acceleration of
          vesting and exercisability and the payment of benefits to the
          Executive shall be reduced so that this limit is not exceeded.  The
          terms "base amount" and "present value" will have the meanings
          assigned to them under Section 280G of the Code.  This limit is
          intended to avoid excise taxes which 

                                      -6-


          may be imposed on the Executive under Section 4999 of the Code 
          and to avoid the disallowance of a deduction to the Company under 
          Section 280G of the Code.

          (c)  TERMINATION FOR CAUSE; TERMINATION BY EXECUTIVE.  If the Company
     shall discharge the Executive for Cause, or if the Executive shall
     terminate his employment with the Company due to death, disability, or any
     other reason, the Executive shall be entitled to receive only the amount of
     base salary accrued by but unpaid to the Executive through the date of such
     termination of employment, and the Company shall have no further obligation
     to make any payment under this Agreement, except as may otherwise be
     provided under the terms of any employee benefit programs in which the
     Executive is then participating. 

           For the purposes of this Agreement, the Company shall have "Cause" to
     terminate the Executive's employment hereunder upon (i) the willful and
     continued failure by the Executive to perform his duties with the Company
     (other than any such failure resulting from incapacity due to physical or
     mental illness), after a demand for substantial performance is delivered to
     the Executive by the Board which specifically identifies the manner in
     which the Board believes that he has not substantially performed his
     duties, or (ii) the willful engaging by the Executive in gross misconduct
     materially and demonstrably injurious to the Company.  For purposes of this
     paragraph, no act, or failure to act, on the Executive's part shall be
     considered "willful" unless done, or omitted to be done, by him not in good
     faith and without reasonable belief that his action or omission was not in
     the best interest of the Company.  Notwithstanding the foregoing, the
     Executive shall not be deemed to have been terminated for Cause unless and
     until there shall have been delivered to him a copy of a resolution duly
     adopted by the affirmative vote of not less than two-thirds (2/3) of the
     entire authorized membership of the Board at a meeting of the Board called
     and held for the purpose (after reasonable notice and an opportunity for
     the Executive, together with counsel, to be heard before the Board),
     finding that in the good faith opinion of the Board he was guilty of
     conduct set forth above in clauses (i) or (ii) of the first sentence of
     this paragraph and specifying the particulars thereof in detail.

          (d)  MITIGATION OF AMOUNTS PAYABLE HEREUNDER.   The Executive shall
     not be required to mitigate the amount of any payment provided for in this
     SECTION 5 by seeking other employment or otherwise, nor shall the amount of
     any payment provided for in this SECTION 5 be reduced by any compensation
     earned by the Executive as the result of employment by another employer
     after the date of termination, or otherwise.

                                      -7-


     6.   CONFIDENTIALITY AGREEMENT.  As a condition of his employment with the
Company, the Executive shall be required to execute the Company's standard
Invention and Confidentiality Agreement.

     7.   MISCELLANEOUS PROVISIONS.

          (a)  SUCCESSORS OF THE COMPANY.  The Company will require any
     successor (whether direct or indirect, by purchase, merger, consolidation
     or otherwise) to all or substantially all of the business and/or assets of
     the Company, by agreement in form and substance satisfactory to the
     Executive, expressly to assume and agree to perform this Agreement in the
     same manner and to the same extent that the Company would be required to
     perform it if no such succession had taken place.  Failure of the Company
     to obtain such agreement prior to the effectiveness of any such succession
     shall be a breach of this Agreement and shall entitle the Executive to
     compensation from the Company in the same amount and on the same terms as
     the Executive would be entitled hereunder if the Company terminated the
     Executive's employment without Cause, except that for purposes of
     implementing the foregoing, the date on which any such succession becomes
     effective shall be deemed the Date of Termination.  As used in this
     Agreement, "Company" shall mean the Company as hereinbefore defined and any
     successor to its business and/or assets as aforesaid which executes and
     delivers the agreement provided for in this SECTION 7(a) or which otherwise
     becomes bound by all the terms and provisions of this Agreement by
     operation of law.

          (b)  SPECIAL REPRESENTATIONS OF EXECUTIVE.  The Executive may not
     assign his rights or delegate his duties or obligations hereunder without
     the written consent of the Company.  The Executive represents to the
     Company that no previous employer has imposed any contractual restriction
     which would, if enforced, have a material adverse effect on the Company. 
     This Agreement shall inure to the benefit of and be enforceable by the
     Executive's personal or legal representatives, executors, administrators,
     successors, heirs, distributees, devisees and legatees.  If the Executive
     should die while any amounts would still be payable to him hereunder as if
     he had continued to live, all such amounts, unless other provided herein,
     shall be paid in accordance with the terms of this Agreement to his
     designee or, if there be no such designee, to his estate.

          (c)  NOTICE.  For the 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 registered or certified mail, return receipt requested, postage
     prepaid, addressed to the respective addresses set forth on the first page
     of this Agreement, provided that all notices to the Company shall be
     directed to the 

                                      -8-


     attention of the Executive Vice President of the Company with a copy 
     to the Secretary of the Company, or to such other person in writing 
     in accordance herewith, except that notices of change of address
     shall be effective only upon receipt.

          (d)  AMENDMENT; WAIVER.  No provisions of this Agreement may be
     modified, waived or discharged unless such waiver, modification or
     discharge is agreed to in writing signed by the Executive and such officer
     as may be designated by the Board of Directors of the Company.  No waiver
     by either party hereto at any time of any breach by the other 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.  Except as provided in SECTION 6, no agreements or
     representations, oral or otherwise, express or implied, with respect to the
     subject matter hereof have been made by either party which are not set
     forth expressly in this Agreement.

          (e)  INVALID PROVISIONS.  Should any portion of this Agreement be
     adjudged or held to be invalid, unenforceable or void, such holding shall
     not have the effect of invalidating or voiding the remainder of this
     Agreement and the parties hereby agree that the portion so held invalid,
     unenforceable or void shall, if possible, be deemed amended or reduced in
     scope, or otherwise be stricken from this Agreement to the extent required
     for the purposes of validity and enforcement thereof.

          (f)  SURVIVAL OF THE PARTIES' OBLIGATIONS.  The obligations of the
     Company and the Executive under this Agreement shall survive regardless of
     whether the Executive's employment by the Company is terminated,
     voluntarily or involuntarily, by the Company or the Executive, with or
     without Cause or Good Reason.

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

          (h)  GOVERNING LAW.  This Agreement shall be governed by and construed
     under the laws of the State of Texas.

          (i)  CAPTIONS.  The use of captions and Section headings herein is for
     purposes of convenience only and shall not effect the interpretation or
     substance of any provisions contained herein. 

                                      -9-


     IN WITNESS WHEREOF, the parties hereto have signed this Agreement on the
10th day of December, 1997, but except as otherwise set forth in this Agreement,
effective as of January 1, 1998.



                              INPUT/OUTPUT, INC.


                              By: /s/ CHARLES E. SELECMAN
                                  --------------------------------------
                              Name: Charles E. Selecman
                              Title: Chairman of the Board, President
                                     and Chief Executive Officer





                              /s/ W. J. ZERINGUE
                                  --------------------------------------
                                  W. J. Zeringue


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