Document:

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                                                                   EXHIBIT 10.25

August 6, 1999

Thomas E. Worthy, Ph.D.

Dear Tom:

I am pleased to offer you the position with Cholestech Corporation (the
"Company") as Vice President - Development, commencing on August 9, 1999. Should
you accept this offer, you will receive a monthly salary of $10,833.33, which
will be paid semi-monthly in accordance with the Company's normal payroll
procedures. You will also be eligible to participate in Cholestech's Management
Incentive Bonus Program. Your transfer from Director of Technical Affairs will
not change your current benefits. You should note, however, that the Company may
modify salaries and/or benefits from time to time as it deems necessary.

If you decide to accept this offer, I will recommend to the Board of Directors
of the Company that, at the next Board meeting following your date of transfer,
you be granted an incentive stock option entitling you to purchase up to 35,000
shares of Common Stock of the Company at the then current fair market value as
determined by the Board at that meeting. Such options shall be subject to the
terms and conditions of the Company's Stock Option Plan and Stock Option
Agreement, including vesting requirements.

You should be aware that your employment with the Company as Vice President -
Development, as with your prior position, will be for no specified period and
constitutes at-will employment. As a result, you are free to resign at any time,
for any reason or for no reason. Similarly, the Company is free to conclude its
employment relationship with you at any time, with or without cause, and with or
without notice. If Cholestech terminates your employment without cause, you will
be eligible to receive a severance amount equal to six months salary, at the
rate of salary in effect immediately prior to such termination and any bonus
earned during your employment (minus applicable withholding). Additionally, if
the Company terminates your employment without cause, your stock option vesting
may be accelerated for six months from the date of termination. You may exercise
the vested options according to the terms and conditions of the Company's Stock
Option Plan and Stock Option Agreement. Please note that these provisions
concerning severance pay and stock options do not change your at-will employment
status and are contingent upon your execution of a severance agreement and
release, which will be presented to you at such time.

<PAGE>   2

Thomas E. Worthy, Ph.D.
August 6, 1999
Page Two

As a Vice President, you will, of course, be expected to continue to abide by
Company rules and standards and you will be specifically required to sign an
acknowledgment that you have read and that you understand the Company's rules of
conduct which are included in the Company Handbook which the Company will soon
complete and distribute. Additionally, as a condition of your promotion, you
will also be required to sign and comply with both the Company's Employment,
Confidential Information, and Invention Assignment Agreement and the Company's
Arbitration Agreement. These agreements will supersede the Employment,
Confidential Information, and Invention Assignment and Arbitration Agreement,
which you previously signed upon joining Cholestech.

To indicate your acceptance of this offer, please sign and date this letter in
the space provided below and return it to the Human Resources Department. A
duplicate original is enclosed for your records. This letter, along with the
agreements relating to proprietary rights between you and the Company, set forth
the terms of your employment with the Company and supersede any prior
representations or agreements, whether written or oral. This letter, including,
but not limited to, its at-will employment provision, may not be modified or
amended except by a written agreement signed by the Company President and you.

Sincerely,

/s/ Warren E. Pinckert II

Warren E. Pinckert II
President and Chief Executive Officer

ACCEPTED AND AGREED TO this

9 day of August, 1999.

/s/ Thomas E. Worthy, Ph. D.
---------------------------------------
Thomas E. Worthy, Ph.D.

Enclosures:    Duplicate Original Letter
               Employment, Confidential Information and Invention Assignment
                 Agreement
               Arbitration Agreement<PAGE>   1

                                                                   EXHIBIT 10.26

March 28, 2000

Terry Wassmann

Dear Terry:

I am pleased to offer you a position with Cholestech Corporation (the "Company")
as VICE PRESIDENT OF HUMAN RESOURCES, commencing on MARCH 29, 2000. You will
receive a monthly salary of $10,833.33, which will be paid semi-monthly in
accordance with the Company's normal payroll procedures. You will be eligible to
participate in Cholestech's Management Incentive Bonus Program. As a Company
Associate, you will be eligible to participate in our Associate benefits package
which includes medical/dental insurance, life insurance, long term disability
insurance, and a 401(k) retirement plan in addition to sixteen (16) days of
Personal Time Off the first year and ten (10) paid holidays. You should note
that the Company may modify salaries and/or benefits from time to time as it
deems necessary. Information regarding these programs and other Company benefits
along with guidelines concerning employment are contained in the Cholestech
Associate package, which is issued at the time employment commences.

We will recommend to the Board of Directors of the Company that, at the next
Board meeting following your date of hire, you be granted a non-qualified
incentive stock option entitling you to purchase up to 30,000 shares of Common
Stock of the Company at the then current fair market value as determined by the
Board at that meeting. Such options shall be subject to the terms and conditions
of the Company's Stock Option Plan and Stock Option Agreement, including vesting
requirements.

The Company is excited about you joining our team and looks forward to a
beneficial and fruitful relationship. Nevertheless, you should be aware that
your employment with the Company is for no specified period and constitutes
at-will employment. As a result, you are free to resign at any time, for any
reason or for no reason. Similarly, the Company is free to conclude its
employment relationship with you at any time, with or without cause, and with or
without notice. We request that, in the event of resignation, you give the
Company at least two weeks notice.

For us to comply with the federal immigration law, you will be required to
provide to the Company documentary evidence of your identity and eligibility for
employment in the United States. Such documentation must be provided to us
within three (3) business days of your date of hire.

<PAGE>   2

Terry Wassmann
March 28, 2000
Page Two

All Associates are required to sign an "Employment, Confidential Information and
Invention Assignment Agreement" and the "Arbitration Agreement" as a condition
of employment. Please review the enclosed Employment, Confidential Information
and Invention Assignment Agreement and the Arbitration Agreement. The
Employment, Confidential Information and Invention Assignment Agreement which
requires, among other provisions, the assignment of patent rights to any
invention made during your employment at the Company, and non-disclosure of
proprietary information. The Arbitration Agreement provides that in the event of
any dispute or claim relating to or arising out of our employment relationship,
you and the Company agree that all such disputes shall be fully and finally
resolved by binding arbitration. This letter, along with these agreements set
forth the terms of your employment with the Company and supersedes any prior
representations or agreements, whether written or oral. This letter may not be
modified or amended except by a written agreement, signed by both parties.
Please feel free to call me with any questions or comments you might have about
the offer.

Kindly acknowledge your acceptance of this offer by signing and returning this
letter, the Employment, Confidential Information and Invention Assignment
Agreement, and the Arbitration Agreement to our Human Resources Department. A
duplicate original of this offer letter is enclosed for your records.

Sincerely,

/s/ Warren E. Pinckert II

Warren E. Pinckert II
President & CEO

ACCEPTED AND AGREED TO this

29 day of  March, 2000.

/s/ Terry Wassmann
---------------------------------------
Terry Wassmann

Enclosures:    Duplicate Original Letter
               Employment, Confidential Information and Invention Assignment
                 Agreement
               Arbitration Agreement<PAGE>   1

                                                                   EXHIBIT 10.27

March 27, 2000

Kevin Stromberg
2978 Ascot Drive
San Ramon, California 94583

Dear Kevin:

I am pleased to offer you a position with Cholestech Corporation (the "Company")
as VICE PRESIDENT OF ENGINEERING, WELLCHECK.COM, commencing on APRIL 10, 2000.
You will receive a monthly salary of $12,083.33, which will be paid semi-monthly
in accordance with the Company's normal payroll procedures. You will be eligible
to participate in Cholestech's Management Incentive Bonus Program. As a Company
Associate, you will be eligible to participate in our Associate benefits package
which includes medical/dental insurance, life insurance, long term disability
insurance, and a 401(k) retirement plan in addition to sixteen (16) days of
Personal Time Off the first year and ten (10) paid holidays. You should note
that the Company may modify salaries and/or benefits from time to time as it
deems necessary. Information regarding these programs and other Company benefits
along with guidelines concerning employment are contained in the Cholestech
Associate package, which is issued at the time employment commences.

We will recommend to the Board of Directors of the Company that, at the next
Board meeting following your date of hire, you be granted a non-qualified
incentive stock option entitling you to purchase up to 50,000 shares of Common
Stock of the Company at the then current fair market value as determined by the
Board at that meeting. Such options shall be subject to the terms and conditions
of the Company's Stock Option Plan and Stock Option Agreement, including vesting
requirements.

The Company is excited about you joining our team and looks forward to a
beneficial and fruitful relationship. Nevertheless, you should be aware that
your employment with the Company is for no specified period and constitutes
at-will employment. As a result, you are free to resign at any time, for any
reason or for no reason. Similarly, the Company is free to conclude its
employment relationship with you at any time, with or without cause, and with or
without notice. We request that, in the event of resignation, you give the
Company at least two weeks notice.

For us to comply with the federal immigration law, you will be required to
provide to the Company documentary evidence of your identity and eligibility for
employment in the United States. Such documentation must be provided to us
within three (3) business days of your date of hire.

<PAGE>   2

Kevin Stromberg
March 27, 2000
Page Two

All Associates are required to sign an "Employment, Confidential Information and
Invention Assignment Agreement" and the "Arbitration Agreement" as a condition
of employment. Please review the enclosed Employment, Confidential Information
and Invention Assignment Agreement and the Arbitration Agreement. The
Employment, Confidential Information and Invention Assignment Agreement which
requires, among other provisions, the assignment of patent rights to any
invention made during your employment at the Company, and non-disclosure of
proprietary information. The Arbitration Agreement provides that in the event of
any dispute or claim relating to or arising out of our employment relationship,
you and the Company agree that all such disputes shall be fully and finally
resolved by binding arbitration. This letter, along with these agreements set
forth the terms of your employment with the Company and supersedes any prior
representations or agreements, whether written or oral. This letter may not be
modified or amended except by a written agreement, signed by both parties.
Please feel free to call me with any questions or comments you might have about
the offer.

Kindly acknowledge your acceptance of this offer by signing and returning this
letter, the Employment, Confidential Information and Invention Assignment
Agreement, and the Arbitration Agreement to our Human Resources Department. A
duplicate original of this offer letter is enclosed for your records.

Sincerely,

/s/ Warren E. Pinckert II

Warren E. Pinckert II
President & CEO

ACCEPTED AND AGREED TO this

28 day of March, 2000.

  /s/ Kevin Stromberg
---------------------------------------
Kevin Stromberg

Enclosures:    Duplicate Original Letter
               Employment, Confidential Information and Invention Assignment
                 Agreement
               Arbitration Agreement

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