Document:

<PAGE>

                                                                    EXHIBIT 10.7

                               Amendment Number 2
                                     to the
                               Alliance Agreement
                                     between
                          Cisco Systems, Inc. ("Cisco")
                                       and
                          KPMG Consulting Inc. ("KPMG")

     WHEREAS, Cisco and KPMG LLP entered into an Alliance Agreement, dated
December 29, 1999 and amended December 1, 2000 (as amended, the "Alliance
Agreement");

     WHEREAS, KPMG LLP assigned the Alliance Agreement to KPMG in conjunction
with the spin-off of KPMG from KPMG LLP;

     WHEREAS, Cisco and KPMG wish to amend the Alliance Agreement as set forth
in this Amendment Number 2 (the "Amendment").

     NOW, THEREFORE, Cisco and KPMG agree to amend the Alliance Agreement as
follows:

1.   Use of Terms. All capitalized terms not defined herein will have the
meaning assigned to them in the Alliance Agreement.

2.   Modification of the Alliance Agreement:

(a) Section 3.1. In the second sentence of Section 3.1, second to last line of
the sentence, the word "consulting" is hereby deleted.

(b) Section 3.1.2. The first sentence of Section 3.1.2 is hereby deleted.

(c) Section 3.1.4. Section 3.1.4 is hereby deleted in its entirety and replaced
with the following:

               3.1.4 Conflicting bidding situations. The parties agree that in
situations where Cisco is bidding as the prime contractor in a bid in which a
customer requests both hardware and services, and Cisco chooses a party other
than KPMG as the services subcontractor, KPMG may make a separate bid to the
customer as the prime contractor for such hardware and services, subject to the
limitations set forth in Section 3.1 above. In the situation in this Section
3.1.4 that KPMG makes a separate bid, or in any other bid situation likely to
create a conflict with a bid from Cisco, KPMG will notify Cisco's account team
or alliance team of such situation, as soon as possible.

(d) Section 3.1.5. Section 3.1.5 is hereby deleted in its entirety and replaced
with the following:

               3.1.5 Cisco Competitive Account. Subject to the limitations
set forth herein, the parties agree that KPMG may submit its bid to a client
which primarily uses products of a Cisco Competitor. In such case, KPMG shall,
in the spirit of good partnership, make every commercially reasonable efforts to
inform Cisco's customer account team or Cisco's Strategic Alliance
representative of such situation and assist Cisco in promoting Cisco
architecture and equipment within the target customer.

(e) Section 3.3.2. Section 3.3.2 of the Alliance Agreement is hereby deleted in
its entirety and replaced with the following:

<PAGE>

  CONFIDENTIAL MATERIAL APPEARING IN THIS DOSCUMENT HAS BEEN OMITTED AND FILED
 SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION IN ACCORDANCE WITH RULE
    24b-2(b) OF THE EXCHANGE ACT OF 1934, AS AMENDED. OMITTED INFORMATION HAS
                         BEEN REPLACED WITH ASTERISKS.

3.3.2. In the event that, pursuant to Section 4.10 of the Stock Purchase
Agreement, Cisco designates an entity as a Cisco Competitor which entity was not
a Cisco Competitor in the prior period as (such newly-designated entity a "New
Cisco Competitor") and KPMG has an existing contract with such New Cisco
Competitor, then nothing in this Section 3 shall be interpreted to require KPMG
to terminate, breach, curtail, change or amend any such contract;
***KPMG***CISCO***.

(f) Section 4.1 of the Alliance Agreement (beginning "4.1 Recruiting. KPMG
shall" and ending "KPMG shall not be in default under this Agreement.") is
hereby deleted in its entirety and replaced with the following: "4.1
Intentionally left blank."

(g) Section 4.2 of the Alliance Agreement (including 4.2.1, 4.2.2 and 4.2.3) is
hereby deleted in its entirety and replaced with the following:

               4.2 Training and Resource Development. KPMG agrees to develop
skills in new Cisco products to foster the rapid assimilation of such products
into the market. When Cisco and KPMG are developing a joint solution, KPMG
agrees to train at least the number of engineers on the design, planning and
implementation management of the technologies associated with the solution
necessary to achieve the purpose of the solution. KPMG agrees to maintain the
level of competence in its staff already trained on Cisco products and
technologies as of July 1, 2001. Yearly, KPMG will agree on a program of update
events to be defined during the alliance annual planning exercise. KPMG agrees
to meet the training requirements set forth in Exhibit A.

               4.2.1    Intentionally left blank.

               4.2.2. In conjunction with the foregoing training, Cisco will
provide resources and materials at a substantial discount off the MSRP, as set
forth in Exhibit B as shall be amended by the mutual agreement of the Parties
from time to time, to enable KMPG to develop and deliver the forgoing training
in support of the Alliance. Such resources will include product experts for
ongoing training and education of new Cisco technologies and will support
required training sessions to build expertise within KPMG on new products prior
to market availability. KPMG shall be responsible for all costs associated with
development and execution of the its training.

               4.2.3 Cisco shall grant KPMG a worldwide, nonexclusive license
to use, reproduce and distribute Cisco training materials which are purchased
from Cisco by KPMG, in whole or in part, solely for internal use to train KPMG
personnel, including the right to incorporate the whole or portions thereof in
KPMG's training materials; provided that KPMG shall not remove, overprint or
deface any notice of copyright, trademark, logo, legend, or other notices of
ownership from any originals or copies (whether of the whole or a portion)
thereof.

<PAGE>

(h) Section 4.3 of the Alliance Agreement is hereby deleted in its entirety and
replaced with the following:

               4.3 Opportunity and Sales Management. Cisco and KPMG will work
jointly in the field to identify, pursue and track sales opportunities, deploy
resources, generate proposals and sell and deploy solutions in support of
Service Provider Market and Enterprise Market customers. In furtherance of this
goal, the Parties agree:

                    o    KPMG shall deploy dedicated contacts to field
                         operations locations to facilitate field interaction.

                    o    KPMG shall assign dedicated representatives in each
                         region, as dictated in number and locations by the
                         business need, to serve as main contact points and
                         regional coordinators for field engagement activities.

                    o    Cisco shall provide a single point of contact in the
                         field for KPMG representatives to enable real-time
                         field interaction.

                    o    Cisco shall provide resources to assist with field
                         opportunity identification and notification. The
                         Parties shall cooperate in joint marketing efforts and
                         shall encourage participation in joint account planning
                         sessions.

(i) Section 4.4. The first paragraph of Section 4.4 of the Alliance
Agreement (beginning "4.4 Facilities and Infrastructure. Subject to" and ending
"one per calendar quarter.") is hereby deleted and replaced with the following:

4.4 Facilities and Infrastructure. Subject to Section 4.9, KPMG will establish
an agreed upon number (but not less than one (1) per joint solution developed
under this Alliance Agreement) Solution Centers for development, training and
client demonstration. Subject to Section 4.9 and any written agreement between
the parties at the time of the definition of the joint solution, KPMG shall make
commercially reasonable efforts to have new solution centers staffed and
operational not later than the launch date of the new solution.

(j) Section 4.6. The last clause of Section 4.6 of the Alliance Agreement "as
specified in Exhibit A and any subsequent Resource Allocation Schedule during
the term of this Agreement" is hereby deleted.

(k) Section 4.8(b) of the Alliance Agreement is hereby deleted in its entirety
and replaced with the following:

          (b) that the marketing budget to promote the Alliance and the Alliance
          Solutions for each party will be dictated by the budget requirements
          to meet the objectives of the mutually agreed upon Marketing and
          Business Plans.

(l) Exhibit A of the Alliance Agreement is hereby deleted and replaced with
Exhibit A attached to this Amendment.

<PAGE>

3.   No Other Modifications. Except as specifically amended by this Amendment,
the Alliance Agreement shall remain in full force and effect.

     IN WITNESS WHEREOF, the parties have caused this Amendment to be duly
executed, effective as of this     day of              , 2001.
                              -----      --------------

Cisco Systems, Inc.:                     KPMG Consulting Inc.:

By:    /s/ Steven R. Steinhiller         By:    /s/ Michael J. Donahue
       ----------------------------             ------------------------------
Name:  Steven R. Steinhiller             Name:  Michael J. Donahue
       ----------------------------             ------------------------------
Title: Vice President                    Title: GEVP and COO
       ----------------------------             ------------------------------
Date:  3/4/02                            Date:  12/18/01
       ----------------------------             ------------------------------

<PAGE>

  CONFIDENTIAL MATERIAL APPEARING IN THIS DOSCUMENT HAS BEEN OMITTED AND FILED
 SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION IN ACCORDANCE WITH RULE
    24b-2(b) OF THE EXCHANGE ACT OF 1934, AS AMENDED. OMITTED INFORMATION HAS
                         BEEN REPLACED WITH ASTERISKS.

                                    Exhibit A

                          Resource Allocation Schedule

I.     Requirements For Consulting Professionals And Cisco Literate Consultants.

         A.       INTENTIONALLY LEFT BLANK.

         B.       SCHEDULE FOR DEPLOYMENT OF CONSULTING PROFESSIONALS AND CISCO
                  LITERATE CONSULTANTS.

         KPMG shall maintain the level of competence on Cisco products and
technologies of its Consulting Professionals and Cisco Literate Consultants who
are trained on Cisco products and technologies as of July 1, 2001. In addition,
KPMG shall maintain the number of its Consulting Professionals and Cisco
Literate Consultants who are trained on Cisco products and technologies as of
July 1, 2001. Yearly, KPMG will agree on a program of update events to be
defined during the alliance annual planning exercise.

         C.       SKILL ALLOCATION OF CISCO LITERATE CONSULTANTS.

         1.       INTENTIONALLY LEFT BLANK.

         2. KPMG shall provide Cisco with updated records on a periodic basis of
all current KPMG staff holding Cisco certifications, including which
certification each individual holds.

         3. To ensure that at all times, KPMG has on staff sufficient personnel
to competently take responsibility for Cisco related projects, KPMG agrees that
***% of KPMG's network engineering personnel will be Cisco CCxx certified. ***%
of those Cisco CCxx certified shall be Cisco Certified Networking Professionals
("CCNP") or Cisco Certified Design Professional ("CCDP).

II.    "Cisco Literate" Definition.

     Cisco Literate Consultant means a person directly employed by KPMG, any
entity which is a member of KPMG International, any other entity that has the
right to use the name "KPMG", any other entity over which KPMG has actual
control or any other entity in which KPMG has the ability to direct the
deployment of such person, in a consulting capacity in one of the following
areas:

o    Cisco Certified Professionals

Obtained one of the levels of Cisco Certification specified in Section I.C.3.
above and assigned to any practice to provide network engineering services to
either Enterprise Market or Service Provider Market clients.

<PAGE>

o    Service Provider Practice

Attended training on Service Provider Market Fundamentals and be on track to
complete the training relevant to their job function. These individuals will be
focused at the Service Provider Market . Skills of such individuals may include
project management, OSS/BSS integration, business development and technical or
network integration

o    Enterprise Practice

Attended training in Cisco BCG products such as Geotel, Webline, etc or
completed training appropriate to their job in co-branded solutions as defined
by the Cisco solution development manager responsible for the development and
deployment of each solution and be on track to complete the training relevant to
the job function.

Training may include business development, best practices and ISV technologies
such as Ariba, Broadvision, Extricity, etc.

Without limiting KPMG's obligations set forth herein, in all cases, the number
and location of new trainees will be determined by the business requirement and
volume of projects to be completed.

Cisco has the right to audit the list of trained professionals (consulting
professionals and Cisco Literate Consultants) at its discretion.<PAGE>

                                                                  EXHIBIT 10.1.1

                                                                  March 13, 2002

By Federal Express

------------------
Mr. Jean-Paul Mangeolle
18 Longmeadow Way
Acton, MA 01720

Dear Jean-Paul:

This letter is a revision and replacement of my letter dated March 8, 2002 to
reflect certain considerations that we have discussed with respect to the
severance arrangements being offered to you as a result of the termination of
your employment with Mykrolis Corporation (the "Company") effective as of
March 8, 2002 (the "Separation Date"). The purpose of this letter is to confirm
the agreement between you and the Company concerning your severance
arrangements, as follows:

     1. Final Salary and Vacation Pay. You will receive pay for all work you
have performed for the Company during the current payroll period through the
Separation Date, to the extent not previously paid, as well as pay, at your
current base rate of pay, for any vacation days you had earned, but not used, as
of the Separation Date in accordance with Company policy.

     2. Severance Benefits. In consideration of your acceptance of this
Agreement and subject to your meeting in full your obligations under it, the
Company will provide you the following severance pay and benefits:

(a)  The Company will pay you salary continuation payments for a period of
     eighteen (18) months following the Separation Date (the "Severance Pay
     Period") as follows: (i) from the Separation Date until December 31, 2002,
     you will be paid at your current (i.e. post reduction) base salary, at the
     rate of One Hundred and Ninety-Nine Thousand Seven Hundred Fifty and 00/100
     Dollars ($199,750.00) per year; (ii) thereafter from January 1, 2003 until
     the expiration of the Severance Pay Period, you will be paid your prior
     2001 (i.e. pre-reduction) base salary, at the rate of Two Hundred and
     Thirty-Five Thousand and 00/100 Dollars ($235,000.00) per year. Payments
     will made in the form of salary continuation and will begin on the next
     regular Company payday which is at least five business days following the
     later of the effective date of this Agreement or the date it is received by
     the Company. The first payment will be retroactive to the day following the
     Separation Date.

(b)  If you were enrolled in the Company's medical and dental plans on the
     Separation Date, the Company will continue these benefits through the
     earlier of (i) September 8, 2002; or (ii) the date you become eligible for
     coverage under the health plan of another employer. Upon termination
     pursuant to (i) or (ii) above, you may, at your own expense, elect to
     continue your participation and that of your eligible dependents in those
     plans for a period of time under the federal law known as "COBRA."

<PAGE>

Mr. Jean-Paul Mangeolle
March 13, 2002
Page 2 of 7

(c)  The services of the Colony Group will continue to be available to you at
     the current level for the balance of 2002. These services will terminate
     December 31, 2002.

(d)  Your contributions and the Company's matching contributions to the Mykrolis
     Corporation Savings and Investment Plan terminate as of the Separation
     Date. The balances in your accounts under the Savings and Investment Plan
     will be paid out to you in accordance with the terms of that Plan. You will
     have a number of options with respect to the payment of these balances; T.
     Rowe Price, the Trustee of the Savings and Investment Plan, has been
     instructed to mail a distribution kit to your home. You should expect to
     receive this in approximately two weeks. This distribution kit will include
     detailed information regarding your payment options, instructions and
     necessary forms.

(e)  As of the Separation Date no options outstanding under the Mykrolis
     Corporation 2001 Equity Incentive Plan are vested. On the Separation Date,
     the Company will cause any options to purchase common stock of the Company
     to which you were entitled before the Separation Date under the Mykrolis
     Corporation 2001 Equity Incentive Plan that would have vested during the
     period commencing with the Separation Date and ending on the first
     anniversary of the Separation Date had you continued to be employed
     throughout that period (the "Separation Vested Options") to become
     exercisable, subject to your signing and returning this Agreement in a
     timely manner and to your not revoking it in a timely manner thereafter.
     You may exercise the Separation Vested Options as of the date immediately
     following the later of: (i) the effective date of this Agreement (which
     shall occur upon the day immediately following the expiration of seven days
     following the date that the Vice President, Human Resources of the Company
     receives this Agreement, signed by you) or (ii) April 1, 2002 (the date on
     which the Company's out-sourced systems to process exercises of stock
     options becomes operational). The Separation Vested Options shall remain
     exercisable until the close of the New York Stock Exchange on April 1,
     2003, after which time any portion of the Separation Vested Options not
     exercised shall be forfeited and shall terminate. Except as otherwise
     expressly provided in this paragraph, the terms and conditions of the
     Separation Vested Options shall remain unchanged and shall be governed by
     the terms of the Mykrolis Corporation 2001 Equity Incentive Plan and the
     applicable stock option grant letter and any other requirements and
     restrictions generally applicable to shares purchased by Company employees,
     as these may be amended from time to time by the Company for participants
     generally.

(f)  The Company will provide you, at the Company's cost, outplacement services
     through Keystone Associates for a period of six months or, if earlier,
     until the date you accept new employment.

<PAGE>

Mr. Jean-Paul Mangeolle
March 13, 2002
Page 3 of 7

     3. Withholding. All payments made by the Company under this Agreement shall
be reduced by any tax or other amounts required to be withheld by the Company
under applicable law and all other deductions authorized by you.

     4. Acknowledgement of Full Payment. You acknowledge and agree that the
payments provided under paragraph 1 of this Agreement are in complete
satisfaction of any and all compensation due to you from the Company, whether
for services provided to the Company or otherwise, through the Separation Date
and that, except as expressly provided under this Agreement, no further
compensation is owed to you. Without limiting the generality of the foregoing,
you expressly waive and relinquish any and all rights you have, or might have,
to any bonus or other incentive compensation, severance pay benefits, or other
compensation, of any kind or description, under any plan or program of the
Company.

     5. Status of Employee Benefits, Paid Time Off and Stock Options. Except as
otherwise expressly provided in paragraphs 2(b) and 2(c) of this Agreement, your
participation in all employee benefit plans of the Company has ended as of the
Separation Date, in accordance with the terms of those plans. You will not
continue to earn vacation or other paid time off after the Separation Date. Your
rights with respect to all stock options to which you were entitled under the
Mykrolis Corporation 2001 Equity Incentive Plan that do not vest in accordance
with paragraph 2(e) hereof have been cancelled as of the Separation Date.

     6. Resignation You hereby resign, effective as of the Separation Date, all
positions and offices held by you with the Company or any of its Affiliates.

     7. Confidentiality and Non-Disparagement. You agree that you will continue
to protect Confidential Information, as defined below, and that you will not,
directly or indirectly, use or disclose it. You also agree that you will not
disclose this Agreement or any of its terms or provisions, directly or by
implication, except to members of your immediate family and to your legal and
tax advisors, and then only on condition that they agree not to further disclose
this Agreement or any of its terms or provisions to others. Further, you agree
that, during the Severance Pay Period and thereafter, you will not disparage or
criticize the Company or its Affiliates, their business, management or products,
and that you will not otherwise do or say anything that could disrupt the good
morale of Company employees or harm the interests or reputation of the Company
or any of its Affiliates.

     8. Return of Company Documents and Other Property. In signing this
Agreement, you represent and warrant that you have returned to the Company any
and all documents, materials and information (whether in hardcopy, on electronic
media or otherwise) related to business of the Company or any of its Affiliates
and all keys, access cards, credit cards, computer hardware and software,
telephones and telephone-related equipment and all other property of the Company
and its Affiliates in your possession or control. Further, you represent and
warrant that

<PAGE>

Mr. Jean-Paul Mangeolle
March 13, 2002
Page 4 of 7

you have not retained any copy of any documents, materials or information of the
Company or any of its Affiliates (whether in hardcopy, on electronic media or
otherwise). Recognizing that your employment with the Company has ended, you
agree that you will not, for any purpose, attempt to access or use any Company
computer or computer network or system. Further, you acknowledge that you have
disclosed to the Company all passwords necessary or desirable to enable the
Company to access all information which you have password-protected on any of
its computer equipment or on its computer network or system.

     9. Restricted Activities. You acknowledge that during your employment with
the Company you have had access to Confidential Information which, if disclosed,
would assist in competition against the Company and agree that the following
restrictions on your activities are necessary to protect the goodwill,
Confidential Information and other legitimate interests of the Company:

(a)  You agree that, during the period from the Separation Date through
     September 30, 2003, you will not, directly or indirectly, whether as owner,
     partner, investor, consultant, agent, employee, co-venturer or otherwise,
     compete with the Company within the United States or in any other country
     in which the Company was doing business, or planning to do business, as of
     the Separation Date. Specifically, but without limiting the foregoing, you
     agree not to work or provide services, in any capacity, whether as an
     employee, independent contractor or otherwise, whether with or without
     compensation, to any Person, as defined below, that is engaged in any
     business that is competitive with the business of the Company, as conducted
     or in planning during your employment with the Company, unless the Company
     agrees, in advance and in writing, signed by an expressly authorized
     representative of the Company, to your working or providing services for a
     specified Person. The Company will so agree provided that it determines, in
     its sole discretion, that your acceptance of a position with such person or
     your provision of such work or services will not result in the use or
     disclosure of Confidential Information. You agree to seek the Company's
     consent at least ten (10) business days prior to accepting any such
     position or commencing any business activity which could be inconsistent
     with your obligations under this Agreement and to provide the Company with
     all information that it may reasonably request in order to make a
     determination as contemplated under the immediately preceding sentence.
     Further, in signing this Agreement, you represent and warrant to the
     Company that you have complied fully with all of your obligations under
     this paragraph 9 and under paragraph 7 of this Agreement during the period
     from the Separation Date through the effective date of this Agreement.

(b)  In signing this Agreement, you give the Company assurance that you have
     carefully read and considered all the terms and conditions of this
     Agreement, including the restraints imposed on you under this paragraph 9.
     You agree without reservation that

<PAGE>

Mr. Jean-Paul Mangeolle
March 13, 2002
Page 5 of 7

     these restraints are necessary for the reasonable and proper protection of
     the Company and that each and every one of the restraints is reasonable in
     respect to subject matter, length of time and geographic area. You further
     agree that, were you to breach any of the covenants contained in paragraph
     7 above or of this paragraph 9, the damage to the Company would be
     irreparable. You therefore agree that the Company, in addition to any other
     remedies available to it, shall be entitled to preliminary and permanent
     injunctive relief against any breach or threatened breach by you of any of
     those covenants, without having to post bond. You and the Company further
     agree that, in the event that any provision of paragraph 7 above or of this
     paragraph 9 is determined by any court of competent jurisdiction to be
     unenforceable by reason of its being extended over too great a time, too
     large a geographic area or too great a range of activities, that provision
     shall be deemed to be modified to permit its enforcement to the maximum
     extent permitted by law.

     10. Employee Cooperation. You agree to cooperate with the Company hereafter
with respect to all matters arising during or related to your employment,
including but not limited to all matters in connection with any governmental
investigation, litigation or regulatory or other proceeding which may have
arisen or which may arise following the signing of this Agreement. The Company
will reimburse your out-of-pocket expenses incurred in complying with Company
requests hereunder, provided such expenses are authorized by the Company in
advance.

     11.   Release of Claims.

(a)  In exchange for the special severance pay and other benefits provided you
     under this Agreement, to which you would not otherwise be entitled, on your
     own behalf and that of your heirs, executors, administrators,
     beneficiaries, personal representatives and assigns, you agree that this
     Agreement shall be in complete and final settlement of any and all causes
     of action, rights or claims that you have had in the past, now have, or
     might now have, whether known or unknown, of any kind or description,
     including without limitation any causes of action, rights or claims in any
     way related to, connected with or arising out of your employment or its
     termination or pursuant to Title VII of the Civil Rights Act, the Americans
     with Disabilities Act, the Age Discrimination in Employment Act, the fair
     employment practices statutes of the state or states in which you have
     provided services to the Company or any of its Affiliates or any other
     federal, state or local law, regulation or other requirement and you hereby
     release and forever discharge the Company and its Affiliates and all of
     their respective past and present directors, shareholders, officers,
     employees, general and limited partners, members, managers, agents and
     representatives, their successors and assigns, and all others connected
     with them, and all employee benefit plans maintained by the Company and all
     trustees and plan administrators of such plans, both individually and in
     their official capacities, from any and all such causes of action, rights
     or claims.

<PAGE>

Mr. Jean-Paul Mangeolle
March 13, 2002
Page 6 of 7

(b)      This Agreement, including the release of claims set forth in the
         paragraph directly above, creates legally binding obligations and the
         Company advises you to consult an attorney before signing this
         Agreement. In signing this Agreement, you give the Company assurance
         that you have signed it voluntarily and with a full understanding of
         its terms; that you have had sufficient opportunity, before signing
         this Agreement, to consider its terms and to consult with an attorney,
         if you wished to do so, or to consult with any other of those persons
         to whom reference in made in the second sentence of paragraph 7 above;
         and that, in signing this Agreement, you have not relied on any
         promises or representations, express or implied, that are not set forth
         expressly in this Agreement.

     12. Definitions.  As used in this Agreement:

     "Affiliates" means any and all persons and entities controlling, controlled
by or under common control with the Company, where control may be by management
authority or equity interest.

     "Confidential Information" means any and all information of the Company and
its Affiliates that is not generally known to the public including, without
limitation, all strategic business plans, marketing and sales data and
information, all financial, technical personnel, manufacturing, operations,
product and systems information. Confidential Information also includes all
information received by the Company or any of its Affiliates from customers or
other third parties with any understanding, express or implied, that the
information would not be disclosed.

     "Person" means an individual, a corporation, a limited liability company,
an association, a partnership, an estate, a trust or any other entity or
organization, other than the Company or any of its Affiliates.

     13. Compliance with Section 16(a) of the Securities Exchange Act. You
acknowledge that it is your responsibility to make all required filings with the
Securities and Exchange Commission and with the New York Stock Exchange with
respect to all holdings of and transactions in Mykrolis common stock not
previously reported. You agree to make all such required filings in accordance
with the rules of the Securities and Exchange Commission.

     14. Miscellaneous.

(a)  This Agreement constitutes the entire agreement between you and the Company
     and supersedes all prior and contemporaneous communications, agreements and
     understandings, whether written or oral, with respect to your employment,
     its termination and all related matters, excluding only any loans to you
     which are outstanding on the effective date hereof and your obligations
     with respect to the securities of the Company, all of which shall remain in
     full force and effect in accordance with their terms.

<PAGE>

Mr. Jean-Paul Mangeolle
March 13, 2002
Page 7 of 7

(b)  This Agreement may not be modified or amended, and no breach shall be
     deemed to be waived, unless agreed to in writing by you and the Chief
     Executive Officer of the Company or his expressly authorized designee. The
     captions and headings in this Agreement are for convenience only and in no
     way define or describe the scope or content of any provision of this
     Agreement. This is a Massachusetts contract and shall be governed and
     construed in accordance with the laws of the Commonwealth of Massachusetts,
     without regard to the conflict-of-law principles thereof.

(c)  The obligation of the Company under paragraph 2 of this Agreement are
     expressly conditioned upon your continued full performance of your
     obligations under this Agreement.

     If the terms of this Agreement are acceptable to you, please sign, date and
return it to me within twenty-one (21) days of the date you receive it. You may
revoke this Agreement at any time during the seven (7) day period immediately
following the date of your signing. If you do not revoke it, then, at the
expiration of that seven (7) day period, this letter will take effect as a
legally-binding agreement between you and the Company on the basis set forth
above. The enclosed copy of this letter, which you should also sign and date, is
for your records.

                                    Sincerely,

                                    MYKROLIS CORPORATION

                                    By: /s/ Robert Crook
                                        -------------------------------
                                        Robert Crook
                                        Vice President, Human Resources

Accepted and agreed:

Signature:
          ------------------------------------

Date:
       ---------------------------------------

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