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                                                                       EXHIBIT F
 
                   AMENDED AND RESTATED EMPLOYMENT AGREEMENT
 
     AGREEMENT dated as of September 19, 1996, between Innotech, Inc., a
corporation organized under the laws of the State of Delaware ("Employer"), and
Robert P. Padula ("Executive").
 
                               R E C I T A L S :
 
     WHEREAS, Executive desires to provide services to Employer and Employer
desires to retain the services of Executive;
 
     WHEREAS, Employer and Executive entered into an employment agreement dated
as of March 18, 1994 (the "March Agreement"), which was subsequently amended on
October 2, 1995, December 1, 1995 and April 1, 1996 (the "collectively,
Amendments"); and
 
     WHEREAS, Employer and Executive desire to amend and restate the March
Agreement and the Amendments and to further modify the terms and conditions of
Executive's employment with Employer.
 
     ACCORDINGLY, Employer and Executive hereby agree:
 
     1. Employment.
 
          1.1. General.  Employer hereby employs Executive in the capacity of
     Vice President of Sales and Customer Care. Executive hereby accepts such
     employment, upon the terms and subject to the conditions herein contained.
 
          1.2. Duties.  During Executive's employment with Employer, Executive
     shall report directly to the President and shall be responsible for
     performing those duties consistent with the position of executive vice
     president of sales and marketing, including all national and domestic
     sales, and international sales, managing the Customer Care Department, and
     performing such other duties as may from time to time be assigned to or
     requested of Executive by Employer's President and/or Board of Directors
     (the "Board"). Executive shall use his reasonable efforts to perform
     faithfully and effectively such responsibilities. Executive shall conduct
     all of his activities in a manner so as to maintain and promote the
     business and reputation of Employer.
 
          1.3. Full-Time Position.  Executive, during his employment with
     Employer, shall devote all of his business time, attention and skills to
     the business and affairs of Employer.
 
          1.4. Location of Employment.  Executive's place of employment during
     his employment with Employer shall be in Roanoke, Virginia or at any
     location as Employer may from time to time move its principal offices.
     Notwithstanding anything to the contrary herein, in the event Employer
     requires Executive to relocate to a location outside of the metropolitan
     Roanoke area and Executive fails to so relocate, such failure shall not be
     grounds for termination by Employer for "Cause" (as hereinafter defined).
 
     2. Compensation and Benefits.
 
          2.1. Salary.  Effective September 19, 1996, Employer shall pay to
     Executive, and Executive shall accept, as full compensation for any and all
     services rendered and to be rendered by him to Employer in all capacities
     during the term of his employment, (i) a base salary at the annual rate of
     $145,000, or at such increased rate as the Board, in its sole discretion,
     may hereafter from time to time grant to Executive ("Base Salary"), payable
     in accordance with the regular payroll practices of Employer, and (ii) the
     additional benefits hereinafter set forth in this Section 2.
 
        2.2. Bonus.
 
             2.2.1. 1996.  Employer shall pay to Executive, as additional
        compensation, a lump-sum bonus of $30,000 if the total sales of
        Employer's fourth quarter of fiscal year 1996 as determined in
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        accordance with generally accepted accounting principles and as set
        forth on Employer's financial statements (without any further
        adjustments) equals or exceeds $3,200,000.
 
             2.2.2. MICP.  Executive shall be entitled to participate in
        Employer's Management Incentive Compensation Plan (the "MICP") and shall
        be entitled to awards granted pursuant to the terms thereof as
        determined by the Board.
 
          2.3. Executive Benefits.
 
             2.3.1. Expenses.  Employer shall reimburse Executive for expenses
        he reasonably incurs in connection with the performance of his duties
        (including business travel and entertainment expenses), all in
        accordance with Employer's policy with respect thereto.
 
             2.3.2. Employer Plans.  Executive shall be entitled to participate
        in such executive benefit plans and programs as Employer may from time
        to time offer or provide to executive officers of Employer, including,
        but not limited to, participation in life insurance, health and accident
        and medical plans and programs.
 
             2.3.3. Vacation.  Executive shall be entitled to two weeks paid
        vacation for each twelve month period Executive is employed by Employer.
        Such vacation time shall be at such times as shall be approved by the
        President or Employer. Vacation, if not taken by Executive in any twelve
        month period, shall not carry over to any subsequent period or periods
        unless otherwise permitted by the policies of Employer.
 
     3. Stock Option.  [Intentionally omitted.]
 
     4. Termination of Employment.
 
          4.1. Termination.  Executive's employment by Employer pursuant to this
     Agreement shall commence on the date of this agreement and shall continue
     until November 30, 1997. Thereafter, it shall continue for successive
     one-year periods commencing on December 1 of each subsequent year;
     provided, however, that either party may elect to terminate this Agreement
     as of November 30, 1997, or as of any subsequent November 30 (a "Renewal
     Termination Date"), by written notice to such effect delivered by the other
     party at least 60 days prior to such Renewal Termination Date. The election
     of Employer or Executive to terminate this Agreement as of November 30,
     1997, or as of any Renewal Termination Date, as provided in this Section
     4.1 shall not be deemed to be termination by Employer under Sections 4.2.3,
     4.2.4 or 4.2.5 hereof or by Executive under Section 4.2.6 hereof, and in
     such event, Executive shall only be entitled to Base Salary through the
     Renewal Termination Date and that portions of any other benefits accrued
     and earned by Executive through the Renewal Termination Date. Upon
     termination of Executive's employment with Employer pursuant to Sections
     4.2.2 through 4.2.6 hereof, inclusive, Executive shall be released from any
     duties and obligations hereunder (except those duties and obligations set
     forth in Sections 5, 6.11, 6.12 and 6.13 hereof) and the obligations of
     Employer to Executive shall be as set forth in Section 4.3 hereof.
 
          4.2. Events of Termination.  Executive's employment with Employer
     shall terminate upon the occurrence of any one or more of the following
     events:
 
             4.2.1. Death.  In the event of Executive's death, Executive's
        employment shall terminate on the date of death.
 
             4.2.2. Disability.  In the event of Executive's Disability (as
        hereinafter defined), Employer shall have the option to terminate
        Executive's employment by giving a Notice of Termination to Executive.
        The Notice of Termination shall specify the date of termination, which
        date shall not be earlier than thirty days after the Notice of
        Termination is given. For purposes of this Agreement, "Disability" means
        the inability of Executive to substantially perform his duties hereunder
        for ninety days out of 180 consecutive days as a result of a physical or
        mental illness all as determined in good faith by the Board.
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             4.2.3. Termination by Employer for Cause.  Employer may, at its
        option, terminate Executive's employment for "Cause" based on objective
        factors determined in good faith by a majority of the Board by giving a
        Notice of Termination to Executive specifying the reasons for
        termination and if Executive shall fail to cure same within ten days of
        his receiving the Notice of Termination his Employment shall terminate
        at the end of such ten day period; provided, that in the event the Board
        in good faith determines that the underlying reasons giving rise to such
        determination cannot be cured, then said cure period shall not apply and
        Executive's employment shall terminate on the date of Executive's
        receipt of the Notice of Termination. "Cause" shall mean (i) Executive's
        conviction of, guilty plea to, or confession of guilt of, a felony, (ii)
        dishonest or illegal conduct or misconduct or malfeasance by Executive
        in the performance of services for or on behalf of Employer, or other
        conduct detrimental to the business, operations or reputation of
        Employer, regardless of whether such conduct is within the scope of
        Executive's duties, (iii) failure by Executive to perform his duties, as
        assigned to him by the President from time to time, (iv) violation by
        Executive of the covenants set forth in this Agreement, (v) Executive's
        filing of a petition in bankruptcy or filing of a petition to take
        advantage of any insolvency act or the filing of any such petition
        against Executive, and (vi) except as may be permitted herein,
        disclosure of Confidential Information (as defined in Section 5.1
        hereof) without the prior written consent of Employer.
 
             4.2.4. Without Cause By Employer.  Employer may, at its option,
        terminate Executive's employment for any reason whatsoever (other than
        for the reasons set forth above in this Section 4.2) by giving a Notice
        of Termination to Executive, and Executive's employment shall terminate
        on the later of the date the Notice of Termination is given or the date
        set forth in such Notice of Termination.
 
             4.2.5. Employer's Material Breach.  Executive may, at his option,
        terminate Executive's employment upon Employer's material breach of this
        Agreement by giving Employer written notice of such breach (which notice
        shall identify the manner in which Employer has materially breached this
        Agreement) and if such breach is not cured within thirty days of
        Employer receiving such written notice, Executive's employment shall
        terminate at the end of such thirty day period. Employer's Material
        Breach of this Agreement shall mean (i) the failure of Employer to pay
        Base Salary or other earned and unpaid bonus hereunder in accordance
        with this Agreement or (ii) the assignment to Executive, without
        Executive's consent, of duties substantially inconsistent with his
        duties as set forth in Section 1.2 hereof.
 
             4.2.6. Without Cause by Executive.  Executive may terminate
        Executive's employment for any reason whatsoever by giving a Notice of
        Termination to Employer. Executive's employment shall terminate on the
        earlier of (i) the date, following the date of the Notice of
        Termination, upon which a suitable replacement for Executive is found by
        Employer, or (ii) five days after the date of receipt by Employer of the
        Notice of Termination.
 
          4.3. Certain Obligations of Employer Following Termination of
     Executive's Employment.  Following the termination of Executive's
     employment under the circumstances described below, Employer shall pay to
     Executive in accordance with its regular payroll practices the following
     compensation and provide the following benefits in full satisfaction and
     final settlement of any and all claims and demands that Executive now has
     or hereafter may have hereunder against Employer:
 
             4.3.1. Death; Disability.  In the event that Executive's employment
        is terminated by reason of Executive's death or for Disability,
        Executive or his estate, as the case may be, shall be entitled to the
        following payments:
 
                (i) Base Salary through the date Executive's employment is
           terminated; and
 
                (ii) Employer shall pay to Executive or his estate, as the case
           may be, the amounts and shall provide all benefits generally
           available under the employee benefit plans, and the policies and
           practices of Employer, determined in accordance with the applicable
           terms and provisions
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           of such plans, policies and practices, in each case, as accrued to
           the date of termination or otherwise payable as a consequence of
           Executive's death or Disability.
 
             4.3.2. Without Cause by Employer; Material Breach By Employer.  In
        the event that Executive's employment is terminated by Employer pursuant
        to Section 4.2.4 or by Executive pursuant to Section 4.2.5, Executive
        shall be entitled to the following payments:
 
                (i) Base Salary through the date Executive's employment is
           terminated;
 
                (ii) a pro-rata portion of any amounts Executive would be
           entitled to under the MICP, if any, accrued on or prior to date
           Executive's employment is terminated for any reason hereunder; and
 
                (iii) continuing payments of Base Salary, payable in accordance
           with the regular payroll practices of Employer, for twelve months
           following the date of termination of Executive's employment.
 
             4.3.3. Termination by Executive Without Cause or by Employer for
        Cause.  In the event Executive's employment as terminated by Executive
        pursuant to 4.2.6 or by Employer pursuant to Section 4.2.3, Executive
        shall be entitled to no further compensation or other benefits under
        this Agreement, except as to that portion of any unpaid Base Salary and
        other benefits earned by him hereunder but not yet paid up to and
        including the effective date of such termination. Executive shall not be
        entitled to receive any additional compensation pursuant to the MICP,
        except that Executive shall be entitled to receive any amounts earned
        but not yet paid under the MICP in respect of any fiscal year prior to
        the year of termination and other benefits, if any, in accordance with
        other applicable plans and policies of Employer.
 
          4.4. Nature of Payments.  All amounts to be paid by Employer to
     Executive pursuant to this Section 4 are considered by the parties to be
     severance payments. In the event such payments are treated as damages, it
     is expressly acknowledged by the parties that damages to Executive for
     termination of employment would be difficult to ascertain and the above
     amounts are reasonable estimates thereof.
 
     5. Confidentiality; Nonsolicitation; NonCompete.
 
          5.1. Confidential Information Defined.  "Confidential Information"
     means any and all information (oral or written) relating to Employer or any
     person controlling, controlled by, or under common control with Employer or
     any of their respective activities, including, but not limited to,
     information relating to: discoveries, innovations, chemistry, patents,
     patent applications, know how, secret processes, research, test procedures
     and results, machinery and equipment; manufacturing processes; financial
     information; products; identity and description of materials and services
     used; purchasing; costs; pricing; customers and prospects; advertising,
     promotion and marketing; trademarks and trademark registrations; copyrights
     and copyright registrations; and information pertaining to any governmental
     investigation, except such information which can be shown by Executive to
     be generally in the public domain (such information not being deemed to be
     in the public domain merely because it is embraced by more general
     information which is in the public domain), other than as a result of a
     breach of the provisions of Section 5.2 hereof.
 
          5.2. Nondisclosure of Confidential Information.  Executive shall not,
     at any time (other than as may be required or appropriate in connection
     with the performance by him of his duties hereunder) directly or
     indirectly, use, communicate, disclose or disseminate any Confidential
     Information in any manner whatsoever (except as may be required under legal
     process by subpoena or other court order).
 
          5.3. Certain Activities.  Executive shall not while employed by
     Employer and thereafter, directly or indirectly, hire, offer to hire,
     entice away or in any other manner persuade or attempt to persuade any
     officer, employee, agent, lessor, lessee, licensor, licensee, customer,
     prospective customer or supplier of Employer to discontinue or alter his or
     its relationship with Employer.
 
          5.4. Covenant Not to Compete.  During Executive's employment and for a
     period of one year after the termination of Executive's employment,
     Executive shall not directly or indirectly engage in
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     competition with Employer by being associated with any competitor of
     Employer that sells or offers to sell any products or services which
     compete with the products or services offered or sold by Employer or being
     developed by Employer for sale at the time termination of employment would
     be difficult to ascertain and the above amounts are reasonable estimates
     thereof.
 
     6. Miscellaneous Provisions.
 
          6.1. Severability.  If in any jurisdiction any term or provision
     hereof is determined to be invalid or unenforceable, (a) the remaining
     terms and provisions hereof shall be unimpaired, (b) any such invalidity or
     unenforceability in any jurisdiction shall not invalidate or render
     unenforceable such provision in any other jurisdiction, and (c) the invalid
     or unenforceable term or provision shall, for purposes of such
     jurisdiction, be deemed replaced by a term or provision that is valid and
     enforceable and that comes closest to expressing the intention of the
     invalid or unenforceable term or provision.
 
          6.2. Execution in 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 taken together shall constitute one and the same agreement
     (and all signatures need not appear on any one counterpart), and this
     Agreement shall become effective when one or more counterparts has been
     signed by each of the parties hereto and delivered to each of the other
     parties hereto.
 
          6.3. Notices.  All notices, requests, demands and other communications
     hereunder shall be in writing and shall be deemed duly given when delivered
     by hand, or when delivered if mailed by registered or certified mail or
     private courier service, postage prepaid, return receipt requested or via
     facsimile (with confirmed answerback) as follows:
 
        If to Employer, to:
               Innotech, Inc.
               5568 Airport Road
               Roanoke, VA 24012
               Attention: President
               Telecopy No.: (540) 366-5177
 
        Copy to:
               Joel D. Zychick, Esq.
               c/o Hertzog, Calamari & Gleason
               100 Park Avenue
               New York, NY 10017
               Telecopy No.: (212) 213-1199
 
        If to Executive, to:
               Robert P. Padula
               161 Twenty-Seventh Street
               Roanoke, VA 24014
 
        or to such other address(es) as a party hereto shall have designated by
        like notice to the other parties hereto.
 
          6.4. Amendment.  No provision of this Agreement may be modified,
     amended, waived or discharged in any manner except by a written instrument
     executed by Employer and Executive.
 
          6.5. Entire Agreement.  This Agreement, as of the date hereof,
     constitutes the entire agreement of the parties hereto with respect to the
     subject matter hereof, and supersedes all prior agreements and
     understandings of the parties hereto, oral or written, with respect to the
     subject matter hereof.
 
          6.6. Applicable Law.  This Agreement shall be governed by and
     construed in accordance with the laws of the State of Delaware applicable
     to contracts made and to be wholly performed therein without regard to its
     conflicts or choice of law provisions.
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          6.7. Headings.  The headings contained herein are for the sole purpose
     of convenience of reference, and shall not in any way limit or affect the
     meaning or interpretation of any of the terms or provisions of this
     Agreement.
 
          6.8. Binding Effect; Successors and Assigns.  Executive may not
     delegate his duties or assign his rights hereunder. This Agreement shall
     inure to the benefit of, and be binding upon, the parties hereto and their
     respective heirs, legal representatives, successors and permitted assigns.
 
          6.9. Waiver. etc.  The failure of either of the parties hereto to at
     any time enforce any of the provisions of this Agreement shall not be
     deemed or construed to be a waiver of any such provision, nor to in any way
     affect the validity of this Agreement or any provision hereof or the right
     of either of the parties hereto to thereafter enforce each and every
     provision of this Agreement. No waiver of any breach of any of the
     provisions of this Agreement shall be effective unless set forth in a
     written instrument executed by the party against whom or which enforcement
     of such waiver is sought, and no waiver of any such breach shall be
     construed or deemed to be a waiver of any other or subsequent breach.
 
          6.10. Capacity, etc.  Executive and Employer hereby represent and
     warrant to the other that: (a) he or it has full power, authority and
     capacity to execute and deliver this Agreement, and to perform his or its
     obligations hereunder; (b) such execution, delivery and performance shall
     not (and with the giving of notice or lapse of time or both would not)
     result in the breach of any agreements or other obligations to which he or
     it is a party or he or it is otherwise bound; and (c) this Agreement is his
     or its valid and binding obligation in accordance with its terms.
 
          6.11. Enforcement.  If any party institutes legal action to enforce or
     interpret the terms and conditions of this Agreement, the prevailing party
     shall be awarded reasonable attorneys' fees at all trial and appellate
     levels, and the expenses and costs incurred by such prevailing party in
     connection therewith. Venue for any such action shall exclusively be
     Roanoke, Virginia.
 
        6.12. Arbitration.
 
             (i) Any dispute under Section 4 of this Agreement, including but
        not limited to the determination by the Board of a termination for Cause
        pursuant to Section 4.2.3 hereof or in respect of the breach thereof
        shall be settled by arbitration in Roanoke, Virginia. The arbitration
        shall be accomplished in the following manner. Either party may serve
        upon the other party written demand that the dispute, specifying the
        nature thereof, shall be submitted to arbitration. Within 10 days after
        the service of such demand, each of the parties shall designate an
        arbitrator and serve written notice of such appointment upon the other
        party. If either party fails within the specified time to appoint such
        arbitrator, the other party shall be entitled to appoint both
        arbitrators. The two arbitrators so appointed shall appoint a third
        arbitrator.
 
             (ii) The decision of the arbitrators shall be final and binding
        upon the parties. The arbitration shall be conducted, to the extent
        consistent with this Section 6.12, in accordance with the then
        prevailing rules of commercial arbitration of the American Arbitration
        Association or its successor.
 
          6.13. Continuing Effect.  Where the context of this Agreement
     requires, the respective rights and obligations of the parties shall
     survive any termination or expiration of the term of this Agreement.
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     IN WITNESS WHEREOF, this Agreement has been executed and delivered by the
parties hereto as of the date first above written.
 
                                          INNOTECH, INC.
 
                                          By: /s/ STEVEN A. BENNINGTON
 
                                            ------------------------------------
                                            Name: Steven A. Bennington
                                            Title: President
 
                                          /s/ ROBERT P. PADULA
 
                                          --------------------------------------
                                          Robert R. Padula