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                                                                   EXHIBIT 10.14

[LETTERHEAD OF CATALYTICA]                                       Jack Hart
                                                                 Vice President
                                                                 Human Resources

 Mr. Peter B. Evans                                  March 26, 1999
 3989 North Peardale Drive
 Lafayette, CA 94549

 Dear Peter:

 Dennis and I are pleased to confirm this revised offer of employment as Senior
 Vice President Business Development for Catalytica Combustion Systems. As you
 know, CCSI is entering an exciting period in its growth and we look forward to
 you contributing significantly to our future. Specifics of the offer are listed
 below:

 Compensation
 ------------

 The CCSI compensation philosophy is to pay competitive salaries and to skew
 incentive compensation significantly towards the long-term through stock
 options. This provides the opportunity for significant wealth generation
 consistent with the growth stage of the business.

 In accordance with the above approach, your salary will be $13,333 per month,
 which annualizes to $180,000. You will be eligible for an annual bonus
 opportunity in 1999 at a target of 12.5% of your salary, prorated for service
 during the calendar year. For 1999 we will guarantee you a minimum bonus of
 $15,000 provided you are an active employee on 12/31/99. You will be eligible
 for annual options with a target value of 89% of your salary for 1999. As part
 of your hiring agreement you will be granted options in the amount of 8,000
 shares of Catalytica Combustion Systems and 3,000 shares of Catalytica Inc.
 These options (vesting is 25% per year) will be granted shortly after your
 start date and will be priced at the date of grant. Consistent with our option
 methodology, these initial options have a value of approximately $200,000. You
 will also receive a sign-on bonus of $10,000 to offset the appreciation in your
 current options and to help cover non-reimbursable expenses associated with
 your move. You will receive the sign-on bonus in your first paycheck from
 Catalytica.

 Peter, please recognize that stock option values and future bonus awards are
 not guaranteed. They will be based on company and individual performance.

 Note: Your next merit increase and option grant review will be March of 2000
 ----
 per our standard compensation process.

 Benefits:
 --------

 Effective upon your date of hire, you and your eligible dependents will be
 covered under the Catalytica, Inc. health (medical, dental, vision and
 prescription drugs), long term disability, and life insurance plans. In
 addition, starting July 1st you will be eligible to participate in the Employee
 Stock Purchase Plan at a discounted price, and the 401(k) retirement plan that
 includes a 50% match (up to 6% of your contribution). You will be eligible for
 3 weeks paid vacation, holidays and sick time earned on an accrual basis from
 your date of hire.

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Mr. Peter Evans
March 28, 1999
Page Two

Relocation
----------

To facilitate the relocation of you and your family, Catalytica will pay the
following:

1.  Travel to the Mountain View area:  Reimbursement of mileage expense.
    --------------------------------

2.  Household Belongings:  Movement of your household belongings from your home
    --------------------
    to the Mountain View vicinity. Evelyn Khinoo will help you contact the
    moving company.

3.  Closing Costs:  Catalytica will cover documented and non-recurring closing
    -------------
    costs (including one point) on the sale of your existing home and on the
    purchase of your new home.

4.  Loans:  The company will provide you two separate loans to assist you in
    -----
    buying a new home. Your new resident will secure both loans. The first is up
    to $150,000 at 6% interest will repayment of the principle in 4 equal
    installments starting after year 4. Interest will be due at the end of the
    loan (and of year 7). The second is for $100,000. This loan is also at 6%
    interest. Starting at the end of year 2 and continuing through the end of
    year 5, 25% of the loan will be forgiven. At the end of year 5, in addition
    to the final principle repayment, the accumulated interest will be forgiven.

5.  Relocation Eligibility:  We will provide the relocation benefits for up to
    ----------------------
    one year. This should allow you ample time to find the house of your
    choice. If you decide to sell your house but wait to purchase, we will
    assist you in finding a suitable rental property.

Reimbursement of Sign-On Bonus and Relocation Costs
---------------------------------------------------

In the event that you should voluntary terminate your employment with Catalytica
within the first year from your hire date, you will be required to reimburse a
prorated portion of the total cost of relocation and the sign-on bonus.
(Example: if you leave the company within 6 months from your employment date,
and the total company cost is $40,000, the reimbursement to Catalytica would be
$20,000 due and payable upon termination.) The home loans are payable in full if
you terminate employment with the Company.

This offer is contingent on acceptable results of a pre-employment
drug-screening test. Catalytica must receive results of the drug test before
your start date. Please contact Evelyn Khinoo at (650) 940-6323 to make the
appropriate arrangements with you.

We look forward to you becoming a key member of the CCSI and Catalytica
executive team. Please indicate your acceptance of this offer by signing below
and returning the original to me.

Sincerely yours,

/s/ Jack Hart

Jack Hart
Vice President, Human Resources

I accept the offer of employment with Catalytica Combustion Systems, Inc.
described in this letter. I understand that this letter is not a contract of
employment.

   /s/ Peter B. Evans                     March 28, 1999
------------------------------           ----------------
       Peter B. Evans                          Date<PAGE>

                                                                   EXHIBIT 10.15

[LOGO OF CATALYTICA]

Ricardo B. Levy
President &
Chief Executive Officer

June 3, 1994

Mr. Lawrence W. Briscoe
241 Selby Lane
Atherton, CA  94027

Dear Larry:

As we have discussed, I believe Catalytica is positioned to develop into a
substantial business enterprise. It now faces the challenges of adjusting the
Company's management focus and raising additional financing. I believe you can
make a significant contribution to Catalytica's success and would like you to
join the Company as a Vice President and its Chief Financial Officer. A brief
outline of your responsibilities in this capacity is provided as Attachment 1.

As the Company's Chief Financial Officer your base compensation will be
$14,583.33 per month payable semi-monthly. Your compensation will be reviewed on
an annual basis.

You would participate in the increase in the equity value of the Company through
an initial grant to purchase 100,000 shares of the Company's common stock under
its Stock Option Plan. The options will be Incentive Stock Options (ISO's) to
the maximum extent permitted. The balance will be Non Qualified Options. The
exercise price of these options would be equal to the closing price for the
Company's shares on NASDAQ on the date you begin employment with the Company. We
understand that you will initially work on a part time basis and become a full
time employee no later than July 15, 1994. The option would become exercisable
10% after six months from the employment date and thereafter ratably over the
succeeding 54 months.

The Company anticipates issuing additional stock options to its senior
management in subsequent years, subject to management performance, and you would
be eligible for such grants. To provide a measure of the options you could
expect to be granted during the next two years, it is agreed that your target
grant
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Lawrence W. Briscoe
June 3, 1994
Page Two

amount for 1995 and 1996 would be 25,000 shares per year. In subsequent years
you would also be eligible for additional grants. The amount of all future
grants of stock options is subject to approval of the Board of Directors.

The Company is currently giving consideration to establishing separate
subsidiaries for various lines of it business with the possibility of
subsequently financing these businesses separately. If it proceeds with an
alternative of this nature and provides an ownership interest in these companies
to senior management of Catalytica, you would be eligible to participate in such
a program. Clearly you would also participate if you were a member of the senior
management of the subsidiaries.

If the Company undergoes a "Change in Control," and thereafter you are
terminated for any reason, or your compensation, benefits or responsibilities
are significantly changed, then any unvested options you hold to purchase shares
of the Company's common stock would vest immediately. Under such circumstances
you would also be entitled to receive continuation of your base compensation for
a period of 18 months if such event occurs within the first 12 months from the
date of your employment, for a period of 12 months if it occurs thereafter. For
purposes of this paragraph, a "Change in Control" is defined as the acquisition
of securities of the Company constituting in excess of 50% of its voting
securities by any party or affiliated group of parties.

Since you, as well as all other employees, are employed at will, the Company
will continue your base salary for a 6 month period if you are terminated at any
time within the first 24 months of your employment for any reason except cause.

You would participate in the Company's benefit plans on the same basis as other
senior Company officers.

Please confirm your acceptance of the position of Vice President and Chief
Financial Officer of Catalytica, Inc. on the terms specified above by signing
below and returning a signed copy of this agreement to me. Following your
acceptance, I will have a more detailed agreement prepared reflecting the
provisions of this letter.

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Lawrence W. Briscoe
June 3, 1994
Page Three

I look forward to working with you and developing Catalytica to its full
potential.

Very truly yours,

/s/ Ricardo B. Levy

Ricardo B. Levy
President and Chief Executive Officer

Agreed and accepted:

/s/ Lawrence W. Briscoe                  June 4, 1994
-----------------------                  ------------
Lawrence W. Briscoe                      Date

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