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                                                                   EXHIBIT 10.30

                  EXECUTIVE OFFICER CHANGE IN CONTROL AGREEMENT

         EXECUTIVE OFFICER CHANGE IN CONTROL AGREEMENT entered into this 31st
day of January, 2003, by and between Teradyne, Inc., a Massachusetts corporation
("Teradyne"), and the undersigned executive officer of Teradyne ("Employee").

                                   WITNESSETH:

         WHEREAS, Teradyne and Employee desire to set forth certain terms and
conditions relating to benefits to be afforded to Employee upon the occurrence
of a Change in Control (as hereinafter defined) of Teradyne;

         NOW THEREFORE, in consideration of the premises and of the mutual
covenants and agreements hereinafter set forth, the parties hereto hereby agree
as follows:

         1. Option Acceleration. (a) during the Term (as hereinafter defined),
if within twenty-four (24) months following a Change in Control there is a
Termination Event (as hereinafter defined), all of Employee's unvested Options
granted prior to, on, or after the date hereof (but only (I) such Options as
have been granted to Employee by Teradyne as of the date of the Change in
Control or (II) such Options as have been assumed by an acquiring company at the
time of a Change in Control or such new options that have been substituted by an
acquiring company for Options existing at the time of a Change in Control, each
pursuant to the terms of any Teradyne option plan) shall automatically become
fully vested as of the date of such Termination Event. The parties hereto
acknowledge that the terms of this Agreement are intended to modify the terms of
Employee's existing Option agreements and to be a supplement to future Option
agreements.

                  (b) For purposes of this Agreement, the following terms shall
have the following meanings:

                  "Cause" shall mean conduct involving one or more of the
following: (i) the substantial and continuing failure of Employee, after notice
thereof, to render services to Teradyne in accordance with the terms or
requirements of his or her employment; (ii) Employee's disloyalty, gross
negligence, willful misconduct, dishonesty, fraud or breach of fiduciary duty to
Teradyne; (iii) Employee's deliberate disregard of the rules or policies of, or
breach of an agreement with, Teradyne which results in direct or indirect loss,
damage or injury to Teradyne; (iv) the unauthorized disclosure by Employee of
any trade secret or confidential information of Teradyne; or (v) the commission
by Employee of an act which constitutes unfair competition with Teradyne.

                  A "Change in Control" shall be deemed to have occurred upon
the occurrence of any of the following events: (i) any consolidation, cash
tender offer, reorganization,

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recapitalization, merger or plan of share exchange following which the
shareholders of Teradyne immediately prior to such transaction own less than a
majority of the combined voting power of the then-outstanding securities of the
combined corporation or person immediately after such transaction; (ii) any
sale, lease, exchange or other transfer of all or substantially all of
Teradyne's assets; (iii) the adoption by the Board of Directors of Teradyne of
any plan or proposal for the liquidation or dissolution of Teradyne; (iv) a
change in the majority of the Board of Directors of Teradyne through one or more
contested elections; or (v) any person (as that term is used in Section 13(d)(3)
or Section 14(d)(2) of the Exchange Act of 1934, as amended) becomes beneficial
owner of 30% or more of the combined voting power of Teradyne's outstanding
voting securities.

                  "Good Reason" shall mean any one or more of the following: (i)
any material reduction of Employee's responsibilities (other than for Cause or
as a result of death or disability); (ii) any material reduction in Employee's
model compensation as in effect on the date of the consummation of the Change in
Control, or as the same may be increased from time to time, or any failure by
Teradyne to pay to Employee any bonus accrued, but not yet paid, upon written
notice by Employee to Teradyne, within 45 days; (iii) a material reduction in
the value of Employee's benefit package from the value of Employee's benefit
package on the date of the consummation of the Change in Control; or (iv) any
permanent assignment of Employee to a job location situated more than 50 miles
away from his current job location.

                  "Option" shall mean an option to purchase shares of Teradyne
Common Stock.

                  "Termination Event" shall mean (i) any termination of Employee
by Teradyne without Cause or (ii) any voluntary termination by Employee for Good
Reason.

         2. (a) Parachute Payment Gross-Up. If any Payments (as hereinafter
defined) to Employee are subject to the Excise Tax (as hereinafter defined),
Teradyne shall pay to Employee a Gross-Up Payment (as hereinafter defined). The
Gross-Up Payment with respect to any Payment shall be paid no later than 15 days
prior to the date that the Excise Tax is due with respect to such Payment.

                  (b) Definitions. For purposes of this Section 2, the following
terms shall have the following meanings:

                    (i)  "Code" shall mean the Internal Revenue Code of 1986, as
                         amended.

                    (ii) "Excise Tax" shall mean the tax imposed by Section 4999
                         of the Code. The amount of the Excise Tax (if any)
                         imposed on any non-cash benefits or any deferred
                         payment or benefit shall be reasonably determined by
                         Teradyne, after consultation with its legal and tax
                         advisors.

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                    (iii) "Gross-Up Payment" shall mean, with respect to
                          Payments to the Employee, the amount necessary so that
                          the amount retained by Employee, after reduction for
                          (1) any Excise Tax on the Gross-Up Payment and (2) any
                          federal, state, or local income and employment taxes
                          imposed on the Gross-Up Payment, is an amount equal to
                          the Excise Tax on the Payments to Employee, other than
                          the Gross-Up Payment. The amount of the Gross-Up
                          Payment shall be reasonably determined by Teradyne
                          after consultation with its legal and tax advisors.

                            (1)    For purposes of determining the amount of the
                                   Gross-Up Payment, Employee shall be deemed to
                                   pay federal income taxes at the highest
                                   marginal rate of federal, state and local
                                   income tax in the calendar year in which the
                                   Gross-Up Payment is made (determined by
                                   reference to Employee's residence for such
                                   calendar year), net of the maximum reduction
                                   in federal income taxes which could be
                                   obtained from deduction of such state and
                                   local taxes.

                            (2)    In the event that the Excise Tax with respect
                                   to the Payments is determined to exceed the
                                   amount taken into account hereunder, Teradyne
                                   shall make an additional Gross-Up Payment in
                                   respect of such excess. For purposes of
                                   calculating such Gross-Up Payment, any
                                   interest or penalties imposed in connection
                                   with such excess Excise Tax shall be treated
                                   as an Excise Tax.

                            (3)    In the event that the Excise Tax with respect
                                   to the Payments is subsequently determined to
                                   be less than the amount taken into account
                                   for purposes of calculating the Gross-Up
                                   Payment, Employee shall promptly repay to
                                   Teradyne the after-tax portion of the
                                   Gross-Up Payment that exceeds the Gross-Up
                                   Payment that otherwise would have been
                                   payable in connection with the actual Excise
                                   Tax imposed on the Payments.

                    (iv)  "Payment" shall mean, with respect to the Employee,
                          any payment in the nature of compensation to (or for
                          the benefit of) such individual, if such payment is
                          contingent on a change (i) in the ownership or
                          effective control of Teradyne or (ii) in the ownership
                          of a substantial portion of the assets of Teradyne (in
                          each case, as reasonably determined by Teradyne in
                          accordance with Section 280G(b)(2) of the Code and the
                          regulations promulgated thereunder). Notwithstanding
                          the foregoing, any amount payable to (or for the
                          benefit of) the Employee shall be a Payment if an

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                          Excise Tax is imposed on the Employee with respect to
                          such payment or benefit, and such payment or benefit
                          is contingent on a change (i) in the ownership or
                          effective control of Teradyne or (ii) in the ownership
                          of a substantial portion of the assets of Teradyne
                          (in each case, determined in accordance with Section
                          280G(b)(2) of the Code and the regulations promulgated
                          thereunder).

         3. No Obligation of Employment. Employee understands that the
employment relationship between Employee and Teradyne will be "at will" and
Employee understands that, prior to any Change in Control, Teradyne may
terminate Employee with or without "Cause" at any time. Following any Change in
Control, Teradyne may also terminate Employee with or without "cause" at any
time subject to Employee's rights and Teradyne's obligations specified in this
Agreement.

         4. Governing Law. This Agreement shall be governed by and construed in
accordance with the internal laws of the Commonwealth of Massachusetts and this
Agreement shall be deemed to be performable in Massachusetts.

         5. Severability. In case any one or more of the provisions contained in
this Agreement for any reason shall be held to be invalid, illegal or
unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provision of this Agreement and this Agreement shall
be construed to the maximum extent permitted by law.

         6. Waivers and Modifications. This Agreement may be modified, and the
rights, remedies and obligations contained in any provision hereof may be
waived, only in accordance with this Section 6. No waiver by either party of any
breach by the other or any provision hereof shall be deemed to be a waiver of
any later or other breach thereof or as a waiver of any other provision of this
Agreement. This Agreement may not be waived, changed, discharged or terminated
orally or by any course of dealing between the parties, but only by an
instrument in writing signed by the party against whom any waiver, change,
discharge or termination is sought.

         7. Assignment. Employee may not assign any of his rights or delegate
any of his duties or obligations under this Agreement. The rights and
obligations of Teradyne under this Agreement shall inure to the benefit of, and
shall be binding upon, the successors and assigns of Teradyne. For purposes of
this Agreement, "Teradyne" shall be deemed to include all successors and assigns
of Teradyne.

         8. Entire Agreement. This Agreement constitutes the entire
understanding of the parties relating to the subject matter hereof and
supersedes and cancels all agreements, written or oral, made prior to the date
hereof between Employee and Teradyne relating to the subject matter hereof;
provided, however, that Employee's existing option agreements, as modified
hereby, shall remain in effect.

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         9. Notices. All notices hereunder shall be in writing and shall be
delivered in person or mailed by certified or registered mail, return receipt
requested, addressed as follows:

         If to Teradyne, to:  Teradyne, Inc.
                              321 Harrison Avenue
                              Boston, MA 02118
                              Attention:  General Counsel

         If to Employee, at Employee's address set forth on the signature page
hereto.

         10. Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one and the same instrument.

         11. Section Headings. The descriptive section headings herein have been
inserted for convenience only and shall not be deemed to define, limit, or
otherwise affect the construction of any provision hereof.

         12. Term. The term of this Agreement (the "Term") shall commence upon
the date hereof and terminate upon the earlier of (i) twenty-four (24) months
following any Change in Control of Teradyne, (ii) the date prior to any Change
in Control of Teradyne that employee for any reason ceases to be an employee of
Teradyne and (iii) the date following any Change in Control of Teradyne that
Employee is terminated for Cause or voluntary terminates his employment (other
than for Good Reason).

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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

                                         TERADYNE, INC.

                                         By:  /s/ George W. Chamillard
                                            ------------------------------------
                                            Name:  George W. Chamillard
                                            Title: Chairman, Chief Executive
                                                   Officer and President of
                                                   Teradyne, Inc.

                                         EMPLOYEE

                                         By:  /s/
                                            ------------------------------------
                                            Name:    Eileen Casal
                                            Address: 41 Commonwealth Avenue
                                                     Boston, Mass.  02116<PAGE>

                                                                   Exhibit 10.21

        AMENDED AND RESTATED EMPLOYMENT AGREEMENT, agreed to be entered into and
effective as of October 25, 2002 (the "Effective Date"), by and between MOORE
MEDICAL CORP., a Delaware corporation (the "Employer"), and JERRY FLASZ of 22
Peach Brook Lane, Brewster, New York 10509 (the "Employee").

        The Employer and Employee hereby agree as follows:

    1. Term; Duties. The term of this Agreement shall be for the period from the
Effective Date through December 31, 2003 (or earlier, pursuant to paragraphs 6,
7, 14 or 15) (the "Term"). The Term shall be automatically extended for
successive one-year periods unless the Company gives the Employee notice of
termination no later than [two] months prior to the end of the Term. During the
Term, the Employer will employ the Employee, and the Employee will serve the
Employer, as its Executive Vice President, Chief Information Officer, reporting
to its President and subject at all times to the direction of its Board of
Directors and Executive Committee. The Employee's office will be at such office
of the Employer in Connecticut as the Employer may designate. The Employee
agrees that during the Term he will devote his entire working time and give his
best efforts and attention to the business of the Employer. The Employee shall
not be required to perform duties inconsistent with those normally assigned by
the Employer to its executive level employees.

    2. Salary. As compensation for his services during the Term, the Employer
will pay the Employee, in installments on the Employer's regular payroll payment
dates and subject to statutory withholding amounts, a salary: for 2003 at the
annual rate of $225,000 plus an inflationary adjustment for any increase during
2002 and thereafter in the Consumer Price Index (or relevant industry data
index, e.g., Connecticut Business Industry Association). The Compensation
Committee of the Board of Directors reserves the right to increase salaries
above such indices.

    3. Bonus Compensation. As additional compensation for his services during
the Term, the Employer will pay the Employee such bonus compensation as may
become due to senior executive officers of the Employer under the 2002 Executive
Officers' Bonus Plan of the Employer. The Employee has received a copy of said
Plan. The Employee will, during the Term, be entitled to participate as a senior
executive officer of the Employer under such Executive Officers' Bonus Plan as
the Employer's Board of Directors may adopt for successive years.

    4. Vacation; Benefits. The Employee will be entitled to three weeks vacation
during each calendar year in the Term. The Employee has received a list of the
Employer's current benefit plans and policies regarding severance, sick leave
and the like, available or applicable to the Employer's executives, including
the Employee. The Employee acknowledges that said list does not set forth all
material terms and conditions of these plans and policies, and that they are
subject to modification or elimination by the Employer. If a new benefit plan is
made available to officers of the Employer generally, the Employee will be a
participant thereunder.

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    5. Non-Competition. The Employee covenants and agrees that during the Term,
and until nine months thereafter, he will not, directly or indirectly, engage or
own any interest in any business competing with or planning to compete with any
business or (if the Employee is aware thereof) planned business of the Employer,
whether as principal, agent, partner, director, officer, stockholder, investor,
lender, consultant, employee, or in any other capacity. The Employee agrees that
a remedy at law for any breach or threatened breach of the foregoing covenant
will be inadequate, and that Employer will be entitled to temporary and
permanent injunctive relief in respect thereof without the necessity of posting
a bond or proving actual damage to Employer.

    6. Death. The death of the Employee will terminate the Term.

    7. Incapacity. If during the Term the Employee is unable, on account of
illness or other incapacity, to perform his duties for a total of more than 45
consecutive or an aggregate of 75 days during any twelve month period, the
Employer has the right to terminate the Term on ten days' written notice to the
Employee, and the Employee will thereafter be entitled to receive only one-half
of his salary installments otherwise payable until the earlier of the last day
of (i) the month-end after the delivery of said notice, or (ii) the Term
(determined without giving effect to such termination).

    8. Employer Information. All information and materials disclosed by the
Employer to the Employee or acquired at the Employer's expense by the Employee
or acquired or developed by the Employee in connection with his services under
this Agreement, all trade secrets of the Employer and all Work-Product
(hereinafter defined) (herein collectively "Employer Information") shall be and
remain the sole property of the Employer. The Employee shall protect all
Employer Information which may be in his possession or custody and shall deliver
all such Information (and all copies thereof, in any media) to the Employer at
its request. Notwithstanding the foregoing, Employment Information shall not
include information that the Employee can demonstrate (i) was known to him prior
to the disclosure to him by the Employer, or (ii) was publicly known at the time
of the disclosure or which thereafter became publicly known without fault of the
Employee.

    9. Work-Product. All right, title and interest in and to any work product
which the Employee acquires, compiles, authors, invents, makes or otherwise
generates, in whole or in part, including all works authored and all inventions
made, for use in connection with or arising out of or in relation to his
services under this Agreement, whether or not copyrightable or patentable
(herein collectively "Work-Product"), shall belong exclusively to the Employer.
During and after the Term of this Agreement, the Employee shall, execute,
acknowledge, and deliver all documents, including, without limitation, all
instruments of assignment, and perform all acts, which the Employer may
reasonably request to secure its rights hereunder.

    10. Confidentiality; Non-use. During and after the Term, the Employee shall
not, without first obtaining the written consent of the Employer, divulge or
disclose to anyone outside the Employer, whether by private or public
communication or publication or otherwise, or use except pursuant to this
Agreement, any Employer Information; however, an incidental non-derogatory
disclosure by the Employee of Employer Information (other than trade secret or
Work Product information) after 18 months following the end of the Term will not
breach this provision.

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    11. Conflicts of Interest; Conflicting Obligations. The Employee agrees that
it is his responsibility to recognize and avoid, and disclose to the President
of the Employer in writing, any situation which might, either directly or
indirectly, adversely affect his judgment in serving the Employer or which might
otherwise involve a conflict between his personal interests and the interests of
the Employer. The Employee represents and warrants to the Employer that at the
date hereof no such situation exists or is contemplated or anticipated. The
Employee agrees not to disclose or use in the course of his services for the
Employer any trade secret, confidential or proprietary information, or
work-product of any party other than the Employer. The Employee represents and
warrants to the Employer that his entry into and performance of this Agreement
do not and will not conflict with any obligation by which he is or may become
bound or any right of a third party to which he is or may become subject. The
Employee will not serve as a Board member of another company unless he seeks and
obtains the Employer's approval prior to making a commitment to do so.

    12. Non-Solicitation. The Employee agrees that, until one year after the
Term, he will not solicit, induce, attempt to hire, or hire any employee of the
Employer, or assist in such hiring by any other party, or encourage any such
employee to terminate his or her employment with the Employer.

    13. Stock Option as an Inducement. Not Applicable.

    14. Effect of "Change of Control"; Termination; Severance. The Employer or
Employee may terminate the Term on written notice to the other within 30 days
after a "Change of Control" (as defined in Section 3(b) of the Employer's Change
of Control and Change of Position Payment Plan). The Employee has received a
copy of said Plan. The Employee may also terminate the Term on written notice to
the Employer within 30 days after "Change of Position" (as defined in Section
3(c)(ii) of the Plan) occurring within twelve months after a Change of Control.
A termination will be effective 30 days after the delivery of the notice. In the
event of a termination by the Employer, the Employee will be entitled to a
severance payment, under Section 4 of the Plan and subject thereto, in the
amount of 100% of the "Base Amount" (as defined in Section 4 of the Plan). In
the event of a termination by the Employee after a Change of Position within
twelve months of a Change of Control, the Employee will be entitled to a
severance payment, under Section 4 of the Plan and subject thereto, in the
amount of 75% of said Base Amount.

    15. Termination. The Employer will have the right to terminate the Term for
cause. However, in the event the Employee's employment is terminated by the
Employer without cause, the Employee will be entitled to receive his salary
payments for 9 (nine) months following the last month of employment, less the
compensation earned and consideration received by the Employee from any
subsequent employment or for otherwise providing services. However, the Employee
will not have an affirmative duty to seek employment not consistent with his
experience (including prior levels of responsibility) and expertise. "Cause"
shall include material breach of this Agreement not cured within 10 days, breach
of fiduciary duty, gross insubordination, willful neglect of duties, habitual
unreliability, personal conduct in material violation of the Employer's policies
or universally accepted good business practices, and other matters of comparable
severity.

    16. Governing Law; Etc. This Agreement is governed by the laws of
Connecticut. It represents the entire agreement of the parties and it cannot be
changed except by a writing

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signed by the President of the Employer and the Employee. All notices by the
Employee to the Employer under this Agreement shall be delivered to the
President of the Employer.

        IN WITNESS WHEREOF, the parties have signed and delivered this
Employment Agreement, effective as of the Effective Date.

                                      MOORE MEDICAL CORP.

/s/ Jerry Flasz                       /s/ Linda M. Autore
------------------------------        ------------------------------------------
JERRY FLASZ                           Linda M. Autore, President & CEO

State of Connecticut
County of Middlesex

        I certify that I know or have sufficient evidence that Jerry Flasz is
the person who appeared before me, and that said person acknowledged that he
signed this instrument and acknowledged it to be his free and voluntary act.

                                      /s/ Linda M. Larson
                                      ------------------------------------------
Dated: October 25, 2002               Notary Public for the State of Connecticut
                                      My commission expires Nov. 30, 2004

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