Document:

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                                                                   EXHIBIT 10.22

                              EMPLOYMENT AGREEMENT

         THIS AGREEMENT is entered into on May 25, 2000, by and between Beth
Broderson, an individual residing at the address set forth on the signature page
hereof, and HYPERION SOLUTIONS CORPORATION, a Delaware corporation (the
"Company").

         1.       DUTIES AND SCOPE OF EMPLOYMENT.

                  (a) Position. For the term of his employment under this
Agreement ("Employment"), the Company agrees to employ the Employee in the
position of Chief Marketing Officer or in such other position as the Company
subsequently may assign to the Employee. The Employee shall report to the
Company's President or to such other person as the Company subsequently may
determine.

                  (b) OBLIGATIONS TO THE COMPANY. During the term of his
Employment, the Employee shall devote his full business efforts and time to the
Company. During the term of his Employment, without the prior written approval
of the Company (which shall not be unreasonably withheld), the Employee shall
not render services in any capacity to any other person or entity and shall not
act as a sole proprietor, partner or managing member of any other person or
entity or as a shareholder owning more than one percent of the stock of any
other corporation. The foregoing, however, shall not preclude the Employee from
engaging in reasonable community, school or charitable activities. The Employee
shall comply with the Company's policies and rules, as they may be in effect
from time to time during the term of his Employment.

                  (c) NO CONFLICTING OBLIGATIONS. The Employee represents and
warrants to the Company that he is under no obligations or commitments, whether
contractual or otherwise, that are inconsistent with his obligations under this
Agreement. The Employee represents and warrants that he will not use or
disclose, in connection with his employment by the Company, any trade secrets or
other proprietary information or intellectual property in which he or any other
person has any right, title or interest and that his employment by the Company
as contemplated by this Agreement will not infringe or violate the rights of any
other person. The Employee represents and warrants to the Company that he has
returned all property and confidential information belonging to any prior
employer.

         2.       CASH AND INCENTIVE COMPENSATION.

                  (a) SALARY. The Company shall pay the Employee as compensation
for his services a base salary at a gross annual rate of not less than $ 200,000
(two hundred thousand dollars. Such salary shall be payable in accordance with
the Company's standard payroll procedures. (The annual compensation specified in
this Subsection (a), together with
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any increases in such compensation that the Company may grant from time to time,
is referred to in this Agreement as "Base Compensation.").

                  (b) INCENTIVE BONUSES. The Employee shall be eligible to be
considered for an annual incentive bonus with a target amount equal to 35% of
his Base Compensation. Such bonus (if any) shall be awarded based on objective
or subjective criteria established in advance by the Company's Board of
Directors (the "Board") or its Compensation Committee. The determinations of the
Board or such Committee with respect to such bonus shall be final and binding.

                  3.       EMPLOYEE BENEFITS. During the term of his Employment,
the Employee shall be eligible to participate in any employee benefit plans
maintained by the Company for similarly situated employees, subject in each case
to the generally applicable terms and conditions of the plan in question and to
the determinations of any person or committee administering such plan.

         In addition to providing the foregoing benefits to Employee, the
Company shall:

                  (i) reimburse the Employee for the reasonable and customary
         cost of an annual physical examination.

                  (ii) provide to the Employee certain income tax services.
         PricewaterhouseCoopers will prepare and sign the Employee's individual
         income tax returns and provide the Employee with estimated tax
         calculations. In addition, the tax professionals at
         PricewaterhouseCoopers will provide the Employee with income tax
         projections to help Employee develop his or her personal financial
         goals and strategies, including planning for the exercise and/or sale
         of option stock.

                  4.       BUSINESS EXPENSES. During the term of his Employment,
the Employee shall be authorized to incur necessary and reasonable travel,
entertainment and other business expenses in connection with his duties
hereunder. The Company shall reimburse the Employee for such expenses upon
presentation of an itemized account and appropriate supporting documentation,
all in accordance with the Company's generally applicable policies. Any single
expenditure in excess of $10,000 shall require the prior approval of the
Company's Chief Executive Officer, President or Chief Financial Officer.

                  5.       TERM OF EMPLOYMENT.

                           (a) BASIC RULE. The Company agrees to continue the
Employee's Employment, and the Employee agrees to remain in Employment with the
Company, from the Effective Time until the earlier of:

                           (i) The close of the applicable Initial Term or
                  Renewal Period, as determined under Subsection (b) below; or

                           (ii) The date when the Employee's Employment
                  terminates

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                  pursuant to Subsection (c) below.

                           (b) INITIAL TERM AND RENEWAL PERIODS. The initial
term of this Agreement shall end on June 30, 2002 (the "Initial Term").
Thereafter this Agreement shall automatically be renewed for successive 12-month
periods (the "Renewal Periods"), unless either party has given the other party
written notice of non-renewal not less than 90 days prior to the close of the
Initial Term or Renewal Period then in effect.

                           (c) EARLY TERMINATION. The Employee may terminate his
Employment at any time and for any reason (or no reason) by giving the Company
30 days' advance notice in writing. The Company may terminate the Employee's
Employment at any time and for any reason (or no reason), and with or without
Cause, by giving the Employee 30 days' advance notice in writing. The Company
may also terminate the Employee's active Employment due to Permanent Disability
by giving the Employee notice in writing. For all purposes under this Agreement,
"Permanent Disability" shall mean that the Employee, at the time notice is
given, has failed to perform his duties under this Agreement for 60 or more
consecutive days or for 90 or more days during any 12-month period as the result
of his incapacity due to physical or mental injury, disability or illness and
which the Company is unable to accommodate reasonably without undue hardship.
The Employee's Employment shall terminate automatically in the event of his
death.

                           (d) RIGHTS AND OBLIGATIONS UPON TERMINATION. Except
as expressly provided in Section 6, upon the termination of the Employee's
Employment pursuant to this Section 5, the Employee shall only be entitled to
the compensation, benefits and reimbursements described in Sections 2, 3 and 4
for the period preceding the effective date of the termination. No incentive
bonus under Section 2(b) shall be payable for the year in which the Employee's
Employment terminates, unless the applicable bonus program expressly provides
for the payment of a prorated bonus for such year. The payments under this
Agreement shall fully discharge all responsibilities of the Company to the
Employee. The termination of this Agreement shall not limit or otherwise affect
the Employee's obligations under Section 7.

                  6.       TERMINATION BENEFITS.

                           (a) GENERAL RELEASE. Any other provision of this
Agreement notwithstanding, Subsections (b) and (c) below shall not apply unless
the Employee has executed a general release (in a form prescribed by the
Company) of all known and unknown claims that he may then have against the
Company or persons affiliated with the Company. Such release shall include,
among other things, an agreement not to prosecute any legal action or other
proceeding based upon any of such claims. The Employee acknowledges that such
release may provide that in the event of a breach by the Employee of the terms
of the release or of Employee's obligations under Section 7 hereof, the Company
shall be entitled to recover from the Employee all amounts paid under
subsections (b) and (c) of this Section 6, as well as all litigation costs
(including attorneys' fees and expenses) incurred by the Company in connection
with such breach.

                           (b) SEVERANCE PAY. The Company shall pay the Employee
his Base

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Compensation for a 12-month period following the effective date of the
termination of his Employment (the "Continuation Period") if:

                           (i) The Company terminates the Employee's Employment
                  under Section 5(c) for any reason other than Cause or
                  Permanent Disability; or

                           (ii) The Company was subject to a Change in Control
                  during the term of this Agreement and, within 12 months
                  thereafter, the Employee resigns for Good Reason.

                           (iii) During the term of this Agreement, the
                  Company's Board of Directors appoints a new Chief Executive
                  Officer ("CEO") and within six months of the first day of such
                  new CEO's employment with the Company, the Employee resigns
                  because the Company has significantly diminished the nature or
                  scope of the Employee's authority, duties or responsibilities
                  in effect immediately prior to the appointment of the new CEO.

Base Compensation under this Subsection (b) shall be paid at the rate in effect
at the time of the termination of Employment and in accordance with the
Company's standard payroll procedures.

                           (c) EMPLOYEE BENEFITS. If Subsection (b) above
applies, the Company shall continue the coverage of the Employee and his
dependents (if applicable) under the employee benefit plans described in Section
3 during the Continuation Period. To the extent that such plans or the insurance
contracts or provider agreements associated with such plans do not permit the
extension of the Employee's coverage following the termination of his active
employment, the Company shall pay the Employee cash in an amount equal to the
cost to the Company of the coverage that cannot be provided. The cash payments
shall be made in accordance with Subsection (b) above.

                           (d) COBRA. If Subsection (b) above applies, and if
the Employee elects to continue his health insurance coverage under the
Consolidated Omnibus Budget Reconciliation Act ("COBRA") following the
termination of his Employment, then the date of the "qualifying event" for
purposes of COBRA shall be the Employee's last day of active employment.

                           (e) DEFINITION OF "CAUSE." For all purposes under
this Agreement, "Cause" shall mean:

                           (i) The Employee's failure to perform in a
                  satisfactory fashion one or more reasonable and lawful duties
                  assigned to the Employee by the Company under this Agreement,
                  if such failure continues for seven days or more after the
                  Company has given the Employee written notice describing such
                  failure and advising him of the consequences of such failure
                  under this Agreement; provided that in the event that the duty
                  or duties are of a nature that is or they cannot reasonably be
                  performed in seven days, the

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                  notice period for such failure shall be thirty days; provided
                  further that such notice shall be required only with respect
                  to the first such failure;

                           (ii) The Employee's misconduct relating to the
                  Company's affairs, under the Company's written policies and
                  procedures, if such misconduct continues for seven days or
                  more after the Company has given the Employee written notice
                  describing such misconduct and advising him of the
                  consequences of such misconduct under this Agreement; provided
                  that such notice shall be required only with respect to the
                  first occurrence of such misconduct; provided further there
                  shall be no requirement that the misconduct continue for seven
                  days or more with respect to acts for which an employee's
                  employment is specifically terminable under the Company's
                  policies and procedures applicable to all employees;

                           (iii) The Employee's conviction of, or a plea of
                  "guilty" or "no contest" to, a felony, or a misdemeanor which
                  calls into question the Employee's honesty, under the laws of
                  the United States or any state thereof;

                           (iv) Any breach of this Agreement, the Proprietary
                  Information and Inventions Agreement between the Employee and
                  the Company, or any other agreement between the Employee and
                  the Company;

                           (v) Threats or acts of violence or harassment
                  directed at any present, former or prospective employee,
                  independent contractor, vendor, customer or business partner
                  of the Company; or

                           (vi) Fraud or embezzlement involving the assets of
                  the Company or its affiliates, customers or suppliers.

The foregoing shall not be deemed an exclusive list of all acts or omissions
that the Company may consider as grounds for the termination of the Employee's
Employment with Cause. Termination for Cause hereunder shall be deemed to be
termination for "Misconduct" under the Company's stock option plans and related
agreements.

                           (f) DEFINITION OF "CHANGE IN CONTROL." For all
purposes under this Agreement, "Change in Control" shall mean a change in
ownership or control of the Company effected through either of the following
transactions:

                           (i) the acquisition, directly or indirectly, by any
                  person or related group of persons (other than the Company or
                  a person that directly or indirectly controls, is controlled
                  by, or is under common control with, the Company), of
                  beneficial ownership (within the meaning of Rule 13d-3 of the
                  1934 Act) of securities possessing more than fifty percent
                  (50%) of the total combined voting power of the Company's
                  outstanding securities pursuant to a tender or exchange offer
                  made directly to the Company's stockholders which the Board
                  does not

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                  recommend such stockholders to accept, or

                           (ii) a change in the composition of the Board over a
                  period of thirty-six (36) consecutive months or less such that
                  a majority of the Board members ceases, by reason of one or
                  more contested elections for Board membership, to be comprised
                  of individuals who either (A) have been Board members
                  continuously since the beginning of such period or (B) have
                  been elected or nominated for election as Board members during
                  such period by at least a majority of the Board members
                  described in clause (A) who were still in office at the time
                  the Board approved such election or nomination.

                           (g) DEFINITION OF "GOOD REASON." For all purposes
under this Agreement, "Good Reason" shall mean:

                           (i) A significant diminution in the nature or scope
                  of the Employee's authority, duties or responsibilities in
                  effect immediately prior to the Change in Control;

                           (ii) Any reduction in the rate of the Employee's Base
                  Compensation in effect immediately prior to the Change in
                  Control or a reduction of 25% or more in the value of the
                  Employee's aggregate compensation and benefits in effect
                  immediately prior to the Change in Control;

                           (iii) The relocation of the Employee's principal
                  place of employment to a site more than 25 miles removed from
                  his principal place of employment immediately prior to the
                  Change in Control; or

                           (iv) An increase of 25% or more in the average amount
                  of time per month that the Employee is required to be away
                  from his principal place of employment, relative to the
                  average amount of time per month that the Employee was
                  required to be away from his principal place of employment
                  immediately prior to the Change in Control.

                  7.       EMPLOYEE'S COVENANTS.

                           (a) NON-SOLICITATION OF EMPLOYEES. During the period
commencing on the date of this Agreement and continuing until the second
anniversary of the date when the Employee's Employment terminated for any
reason, the Employee shall not interfere with the business of the Company by,
directly or indirectly, personally or through others, soliciting or attempting
to solicit (on the Employee's own behalf or on behalf of any other person or
entity) the employment of any employee of the Company or any of the Company's
affiliates. During such period, the Employee shall not encourage or induce, or
take any action that has the effect of encouraging or inducing, any employee of
the Company or any of the Company's affiliates to terminate his or her
employment.

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                           (b) LIMITATION ON HIRING OF EMPLOYEES. For a period
of 120 days following the date when the Employee's Employment terminated for any
reason, the Employee shall not hire, or assist any other person in hiring, any
person who was an employee of the Company on the date when the Employee's
Employment terminated to work at the Employee's new place of employment in a
position that reports either directly to the Employee or to any other person who
reports directly to the Employee.

                           (c) NON-SOLICITATION OF CUSTOMERS. The parties agree
that information relating to the identities, key contact personnel, preferences,
needs and circumstances of the Company's customers are trade secrets belonging
to the Company that are, and necessarily will be, used by the Employee in the
solicitation of business from the Company's customers. As a result, during the
period commencing on the date of this Agreement and continuing until the second
anniversary of the date when the Employee's Employment terminated for any
reason, the Employee shall not, directly or indirectly, personally or through
others, solicit or attempt to solicit (on the Employee's own behalf or on behalf
of any other person or entity) the business of any customer of the Company, or
of any of the Company's affiliates, for services or products similar to those
sold by the Company.

                           (d) NON-DISCLOSURE. The Employee has entered into a
Proprietary Information and Inventions Agreement with the Company, which is
incorporated herein by reference and survives the termination or expiration of
this Agreement. Given the nature of the Employee's position as Chief Marketing
Officer of the Company, the parties agree that it would be practically
impossible for the Employee to work as a [describe nature of position] for
certain companies, including their subsidiaries and affiliates, that provide
services or products that are similar to those of the Company without disclosing
the Company's trade secrets. A list of such companies, which may be amended from
time to time by written notice of the Company, is attached hereto as Schedule A.

                           (e) NON-COMPETITION. The following provision shall
apply only to the extent that the Employee resides and has his principal place
of employment outside of the State of California. During the period commencing
on the date of this Agreement and continuing until the second anniversary of the
date when the Employee's Employment terminated for any reason, the Employee
shall not, directly or indirectly (other than on behalf of the Company or with
the Company's prior written consent), engage in a Competitive Business Activity
in any of the locations listed in Schedule B attached hereto. If Section 6(b)
applies, the foregoing two year period shall be reduced to one year. The term
"Competitive Business Activity" shall mean:

                           (i) Engaging in, or managing or directing persons
                  engaged in, any business in which the Company or any of the
                  Company's affiliates is engaged at the time of the termination
                  of the Employee's Employment, whether independently or as an
                  employee, agent, consultant, advisor, independent contractor,
                  proprietor, partner, officer, director or otherwise;

                           (ii) Acquiring or having an ownership interest in any
                  entity that derives more than 15% of its gross revenues from
                  any business in which the Company or any of the Company's
                  affiliates is engaged at the time of

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                  the termination of the Employee's Employment, except for
                  ownership of 1% or less of any entity whose securities are
                  freely tradable on an established market; or

                           (iii) Participating in the financing, operation,
                  management or control of any firm, partnership, corporation,
                  entity or business described in Paragraph (ii) above.

                           (f) NON-DISPARAGEMENT. Commencing on the date when
the Employee's Employment terminated for any reason and continuing thereafter,
the Employee shall not directly or indirectly, personally or through others,
disparage the Company or any of its predecessors, including each of their past,
current, or future board of directors or senior management or any of their
products or services.

                           (g) INJUNCTIVE RELIEF. The Employee acknowledges and
agrees that his failure to perform any of his covenants in this Section 7 would
cause irreparable injury to the Company and cause damages to the Company that
would be difficult or impossible to ascertain or quantify. Accordingly, without
limiting any other remedies that may be available with respect to any breach of
this Agreement, the Employee consents to the entry of an injunction to restrain
any breach of this Section 7.

                           (h) SURVIVAL. The covenants in this Section 7 shall
survive any termination or expiration of this Agreement and the termination of
the Employee's Employment with the Company for any reason.

                  8.       SUCCESSORS.

                           (a) COMPANY'S SUCCESSORS. This Agreement shall be
binding upon any successor (whether direct or indirect and whether by purchase,
lease, merger, consolidation, liquidation or otherwise) to all or substantially
all of the Company's business and/or assets. For all purposes under this
Agreement, the term "Company" shall include any successor to the Company's
business and/or assets which becomes bound by this Agreement.

                           (b) EMPLOYEE'S SUCCESSORS. This Agreement and all
rights of the Employee hereunder shall inure to the benefit of, and be
enforceable by, the Employee's personal or legal representatives, executors,
administrators, successors, heirs, distributees, devisees and legatees.

                  9.       MISCELLANEOUS PROVISIONS.

                           (a) NOTICE. Notices and all other communications
contemplated by this Agreement shall be in writing and shall be deemed to have
been duly given when (i) personally delivered, (ii) delivered to the U.S. Postal
Service for delivery by registered or certified mail or (iii) delivered to a
comparable private service offering guaranteed deliveries in the ordinary course
of its business. Notice under clauses (ii) and (iii) shall be valid only if
delivery charges have been prepaid and a return receipt will be furnished. In
the case of the Employee, notice under clauses (ii) and (iii) shall be addressed
to him at the home address which

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he most recently communicated to the Company in writing. In the case of the
Company, notice under clauses (ii) and (iii) shall be addressed to its corporate
headquarters and directed to the attention of its Secretary.

                           (b) MODIFICATIONS AND WAIVERS. No provision of this
Agreement shall be modified, waived or discharged unless the modification,
waiver or discharge is agreed to in writing and signed by the Employee and by an
authorized officer of the Company (other than the Employee). No waiver by either
party of any breach of, or of compliance with, any condition or provision of
this Agreement by the other party shall be considered a waiver of any other
condition or provision or of the same condition or provision at another time.

                           (c) WHOLE AGREEMENT. This Agreement supersedes any
prior employment agreement between the Employee and the Company. No other
agreements, representations or understandings (whether oral or written and
whether express or implied) which are not expressly set forth in this Agreement
have been made or entered into by either party with respect to the subject
matter hereof. This Agreement and the Proprietary Information and Inventions
Agreement between the Employee and the Company contain the entire understanding
of the parties with respect to the subject matter hereof.

                           (d) WITHHOLDING TAXES. All payments made under this
Agreement shall be subject to reduction to reflect taxes or other charges
required to be withheld by law.

                           (e) CHOICE OF LAW. The validity, interpretation,
construction and performance of this Agreement shall be governed by the laws of
the State of Connecticut without regard to its choice of law principles.

                           (f) SEVERABILITY. The invalidity or unenforceability
of any provision or provisions of this Agreement shall not affect the validity
or enforceability of any other provision hereof, which shall remain in full
force and effect.

                           (g) ARBITRATION. Subject to Section 7(g), any
controversy or claim arising out of or relating to this Agreement or the breach
thereof, or the Employee's Employment or the termination thereof, shall be
settled in Fairfield County, Connecticut, by arbitration in accordance with the
National Rules for the Resolution of Employment Disputes of the American
Arbitration Association. The decision of the arbitrator shall be final and
binding on the parties, and judgment on the award rendered by the arbitrator may
be entered in any court having jurisdiction thereof. The parties hereby agree
that the arbitrator shall be empowered to enter an equitable decree mandating
specific enforcement of the terms of this Agreement. The Company and the
Employee shall share equally all fees and expenses of the arbitrator; provided,
however, that the Company or the Employee, as the case may be, shall bear all
fees and expenses of the arbitrator and all of the legal fees and out-of-pocket
expenses of the other party if the arbitrator determines that the claim or
position of the Company or the Employee, as the case may be, was without
reasonable foundation. The Employee hereby consents to personal jurisdiction of
the state and federal courts located in the State of Connecticut for any action
or proceeding arising from or relating to this Agreement or relating to any
arbitration in which the parties are participants.

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                           (h) NO ASSIGNMENT. This Agreement and all rights and
obligations of the Employee hereunder are personal to the Employee and may not
be transferred or assigned by the Employee at any time. The Company may assign
its rights under this Agreement to any entity that assumes the Company's
obligations hereunder in connection with any sale or transfer of all or a
substantial portion of the Company's assets to such entity.

                           (i) GENDER. Use of the masculine pronoun shall be
deemed to include usage of the feminine pronoun where appropriate.

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

IN WITNESS WHEREOF, each of the parties has executed this Agreement, in the case
of the Company by its duly authorized officer, as of the day and year first
above written.

                                             /s/ Beth Broderson
                                             -----------------------------------

                                             HYPERION SOLUTIONS CORPORATION

                                             By:      /s/ Christina M. Rulo
                                             -----------------------------------
                                             Name:  Christina M. Rulo
                                             -----------------------------------
                                             Title:   VP Human Resources
                                             -----------------------------------

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                                   SCHEDULE A

Adaytum Software
Applix, Inc
Broadbase Software, Inc.
Business Objects
Cognos, Inc.
Computer Associates International, Inc.
Corporate Planning
Comshare Incorporated
E.piphany, Inc.
Frango AB
Gentia Software
Great Plains Software, Inc.
Information Builders, Inc.
Informix Software, Inc.
Lawson Software
Kenan Systems Corporation
Kopcke and Associates
MicroStrategy Inc.
Microsoft Corporation
MIS AG MIK
Oracle Corporation
PeopleSoft, Inc.
SAP AG
SAS Institute, Inc.
Showcase Corporation
United Information Technologies, Inc.

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                                   SCHEDULE B

Alabama                                       North Carolina
Alaska                                        North Dakota
Arizona                                       Ohio
Arkansas                                      Oklahoma
California                                    Oregon
Colorado                                      Pennsylvania
Connecticut                                   Rhode Island
Delaware                                      South Carolina
Florida                                       South Dakota
Georgia                                       Tennessee
Hawaii                                        Texas
Idaho                                         Utah
Illinois                                      Vermont
Indiana                                       Virginia
Iowa                                          Washington
Kansas                                        West Virginia
Kentucky                                      Wisconsin
Louisiana                                     Wyoming
Maine                                         District of Columbia
Maryland                                      Australia
Massachusetts                                 Brazil
Michigan                                      Canada
Minnesota                                     England
Mississippi                                   France
Missouri                                      Germany
Montana                                       Hong Kong
Nebraska                                      Israel
Nevada                                        Japan
New Hampshire                                 Mexico
New Jersey                                    Netherlands
New Mexico                                    Singapore
New York                                      United Kingdom

                                       12<PAGE>   1

                                                                    EXHIBIT 10.2

                                 Ten Canal Park
                         Cambridge, Massachusetts 02141
                                (the "Building")

                                FIRST AMENDMENT
                                ---------------
                                  May 5, 1997

   ------------
   |
   |       LANDLORD:      Beacon Properties, L.P., successor-in-interest to
   |                      Teachers Insurance and Annuity Association of
   |                      America
   |
   |       TENANT:        Aspen Technology, Inc.
   |
   |       EXISTING
   |       PREMISES:      The second (2nd) through sixth (6th) floors of
   |                      the Building, containing 101,909 rentable square
   |                      feet, as shown on Exhibits A and A-1 to the Lease
   |
   |       LEASE
   |       EXECUTION
           DATE:          January 30, 1992
ORIGINAL
LEASE      TERMINATION
DATA       DATE:          September 30, 2002

   |       PREVIOUS
   |       LEASE
   |       AMENDMENTS:    None
   |
   -----------
           FIRST
           AMENDMENT
           ADDITIONAL
           PREMISES:      Two (2) areas on the first (1st) floor of the
                          Building, consisting of 3,264 rentable square feet
                          and 5,670 rentable square feet, substantially
                          as shown on Exhibit A, First Amendment, a copy
                          of which is attached hereto and made a part hereof.

     WHEREAS, Tenant desires to lease additional premises in the Building, to
wit, the First Amendment Additional Premises; and

     WHEREAS, Landlord is willing to lease the First Amendment Additional
Premises to Tenant on the terms and conditions hereinafter set forth.

                                      -1-

<PAGE>   2
     NOW THEREFORE, the above-described lease (the "Lease") is hereby amended as
follows (capitalized terms used herein without definition shall have the
meanings ascribed to them in the Lease):

     1.  DEMISE OF FIRST AMENDMENT ADDITIONAL PREMISES

     Landlord hereby demises and leases to Tenant, and Tenant hereby hires and
takes from Landlord, the First Amendment Additional Premises for a term
commencing as of the date (the "Commencement Date in respect of the First
Amendment Additional Premises") which is the earlier of (i) the substantial
completion date of the First Amendment Additional Premises Work (as hereinafter
defined), (ii) the date on which Tenant first occupies all or any part of the
First Amendment Additional Premises for business operations, or (iii) September
1, 1997, and terminating as of September 30, 2002, subject to the provisions of
Paragraph 4 below. Said demise of the First Amendment Additional Premises shall
otherwise be upon all of the same terms and conditions of the Lease (including,
without limitation, Tenant's obligation to pay Escalation Charges in respect of
the First Amendment Additional Premises on account of Taxes, Operating Expenses
and Utility Expenses, and Tenant's obligation to contract and pay for
electricity in respect of the First Amendment Additional Premises pursuant to
Section 7.5 of the Lease), except as follows:

         A.  The Premises Rentable Area in respect of the First Amendment
Additional Premises shall be 8,934 rentable square feet.

         B.  The Basic Rent payable in respect of the First Amendment Additional
Premises shall be One Hundred Fifty-One Thousand Eight Hundred Seventy-Eight and
00/100 ($151,878.00) Dollars (i.e., a monthly payment of $12,656.50).

         C.  Without limiting Tenant's use of the First Amendment Additional
Premises for the Permitted Uses (i.e., general office specifically excluding
offices of governmental agencies or authorities), in order to comply with the
condition imposed by the City of Cambridge (the "City") in its approval of the
use of the First Amendment Additional Premises as office space (as more
particularly described in Paragraph 4A below), Tenant shall cause the physical
layout of the First Amendment Additional Premises to be as active and visually
engaging as possible and shall not block-off the exterior windows thereof or
otherwise seriously diminish the visual access into and out of the First
Amendment Additional Premises as would be characteristic of a retail operation.

         D.  Tenant shall be entitled to two (2) additional unreserved and
undesignated parking spaces in the Building Garage by reason of the demise of
the First Amendment Additional Premises. The use of such parking spaces shall be
upon the terms and conditions of Section 14.30 of the Lease applicable to the
use of the other parking spaces in the Building Garage made available by
Landlord to Tenant. Tenant

                                      -2-

<PAGE>   3
shall not be entitled to any additional parking spaces in the First Street
Garage by reason of the demise of the First Amendment Additional Premises.

         E.  If Tenant shall timely and properly exercise its right to extend
the Term of the Lease pursuant to Paragraph 1 of Rider D to the Lease, the Basic
Rent payable in respect of the First Amendment Additional Premises for the
applicable Extension Period shall based upon the Fair Market Rental Value (not
90% of the Fair Market Rental Value) of the First Amendment Additional Premises
as of the commencement of the applicable Extension Period, but in no event less
than the Basic Rent payable in respect of the First Amendment Additional
Premises for and with respect to the twelve (12) month period immediately
preceding the commencement of such Extension Period.

         F.  Item 9 of Paragraph B of Exhibit E to the Lease shall be of no
force or effect for so long as the First Amendment Additional Premises are
leased to Tenant.

         G.  In the event that any of the provisions of the Lease are
inconsistent with this Amendment or the state of facts contemplated hereby, the
provisions of this Amendment shall control.

Without limiting the foregoing, effective as of the Commencement Date in respect
of the First Amendment Additional Premises, the Escalation Factor in respect of
the Existing Premises and First Amendment Additional Premises and the Operating
Expense Escalation Factor in respect of the Existing Premises and First
Amendment Additional Premises shall each be 100%. Once the Commencement Date in
respect of the First Amendment Additional Premises is known, the parties shall
promptly confirm the same in writing.

     2.  CONDITION OF FIRST AMENDMENT ADDITIONAL PREMISES

     Notwithstanding anything to the contrary contained in the Lease, Tenant
shall lease the First Amendment Additional Premises "as-is", in the condition in
which the First Amendment Additional Premises are in as of the Commencement Date
in respect of the First Amendment Additional Premises, without any obligation on
the part of Landlord to prepare or construct the First Amendment Additional
Premises for Tenant's occupancy or, except as provided in Paragraph 3 below, to
provide any allowance or contribution with respect thereto, and without any
warranty or representation on the part of Landlord as to the condition of the
First Amendment Additional Premises. Any and all work necessary to prepare the
First Amendment Additional Premises for Tenant's occupancy (the "First Amendment
Additional Premises Work") shall be performed by Tenant in accordance with and
subject to the terms and provisions of Section 4.4(b) (other than the fourth and
last sentences thereof) and 5.2 of the Lease, it being acknowledged and agreed
that the other provisions of Article IV of the Lease shall not apply to the
performance by

                                      -3-

<PAGE>   4
Tenant of the First Amendment Additional Premises Work (except for the
definition of "Base Building Systems" on page 10 of the Lease). Without limiting
the foregoing, if Landlord shall engage thirty party consultants (e.g.,
architects or engineers) to review the plans and specifications for the First
Amendment Additional Premises Work, Tenant shall reimburse Landlord upon demand
for the fees and expenses paid by Landlord to such consultants. Tenant further
acknowledges that Landlord shall have the right to supervise the performance of
the First Amendment Additional Premises Work and to charge Tenant a construction
management fee of One Hundred Dollars ($100.00) per hour for the same, which
Tenant agrees to pay to Landlord upon demand.

     3.  LANDLORD'S CONTRIBUTION IN RESPECT OF FIRST
         AMENDMENT ADDITIONAL PREMISES

     A.  Landlord shall, in the manner hereinafter set forth, provide to Tenant
up to Two Hundred Thirty-Two Thousand Two Hundred Eighty-Four and 00/100
($232,284.00) Dollars ("Landlord's Contribution") towards the so-called hard and
soft costs related to the First Amendment Additional Premises Work, including,
but not limited to, all architectural and engineering costs incurred by Tenant
and the amounts required to be paid by Tenant to Landlord pursuant to the last
two sentences of Paragraph 2 above. In no event, however, shall Landlord's
Contribution be used to pay for personal property or equipment installed or used
by Tenant in the First Amendment Additional Premises (e.g., computers,
furniture, etc.). Provided that Tenant is not in default of its obligations
under the Lease (as hereby amended) at the time that Tenant submits to Landlord
any requisition (as hereinafter defined) on account of Landlord's Contribution,
Landlord shall pay the cost of the work shown on each such requisition within
thirty (30) days of Landlord's receipt thereof.

     B.  For the purposes hereof, a "requisition" shall mean written
documentation (including, without limitation, invoices from Tenant's contractor,
written lien waivers and such other documentation as Landlord may reasonably
request) showing in reasonable detail the costs of the First Amendment
Additional Premises Work. Each requisition shall be accompanied by evidence
reasonably satisfactory to Landlord that all work covered by previous
requisitions has been fully paid by Tenant. Landlord shall have the right, upon
reasonable advance notice to Tenant, to inspect Tenant's books and records
relating to each requisition in order to verify the amount thereof. Tenant shall
submit requisition(s) to Landlord no more often than monthly.

     C.  Notwithstanding anything to the contrary herein contained:

         (i)  Landlord shall have no obligation to advance funds on account of
Landlord's Contribution unless and until Landlord has received the requisition
in question, together with the certifications required by Subparagraph B above,
certifying that the work shown on the requisition has been performed in
accordance with applicable law and in accordance with Tenant's plans.

                                      -4-

<PAGE>   5
         (ii)  Except with respect to work and/or materials previously paid for
by Tenant, as evidenced by paid invoices and written lien waivers provided to
Landlord, Landlord shall have the right to have Landlord's Contribution paid to
both Tenant and Tenant's contractor(s) and vendor(s) jointly, or directly to
Tenant's contractor(s) or vendor(s) if Landlord has reason to believe there are
or may be outstanding claims by such contractor(s) or vendor(s).

         (iii)  Landlord shall have no obligation to pay Landlord's Contribution
in respect of any requisition submitted to Landlord after August 31, 1998.

         (iv)  Tenant shall not be entitled to any unused portion of Landlord's
Contribution.

     D.  Except for Landlord's Contribution, Tenant shall bear all costs of the
First Amendment Additional Premises Work. Landlord shall have no liability or
responsibility for any claim, injury or damage alleged to have been caused by
the particular materials, whether building standard or non-building standard,
selected by Tenant in connection with the First Amendment Additional Premises
Work.

     E.  Notwithstanding the foregoing, if and to the extent that the amounts
paid by Landlord on account of Landlord's Contribution exceed One Hundred
Eighty-Seven Thousand Six Hundred Fourteen and 00/100 ($187,614.00) Dollars,
Tenant shall pay to Landlord, as additional rent, Construction Rent, as
hereinafter defined, based upon such excess amount (such excess amount being
hereinafter referred to as the "Construction Principal"). For purposes hereof,
Construction Rent shall mean and be equal to the amount of equal monthly
payments of principal and interest which would be necessary to repay a loan in
the amount of the Construction Principal, together with interest thereon at the
rate of twelve (12%) percent per annum, on a level direct reduction basis over a
term of forty-eight (48) months. Monthly payments of Construction Rent shall be
payable at the same time and in the same manner as Basic Rent is payable under
the Lease and shall commence on the Commencement Date in respect of the First
Amendment Additional Premises, unless the amount of Construction Principal has
not been finally determined by the Commencement Date in respect of the First
Amendment Additional Premises, in which event (i) Tenant's obligation to pay
Construction Rent shall commence on the first day of the first month following
the date on which the amount of Construction Principal has been finally
determined, and (ii) Tenant shall be obligated to pay to Landlord with Tenant's
first payment of Construction Rent the aggregate amount of Construction Rent
which would have been payable by Tenant had Tenant's obligation to pay
Construction Rent commenced on the Commencement Date in respect of the First
Amendment Additional Premises (for example, if the Commencement Date in respect
of the First Amendment Additional Premises is July 1, 1997 and the amount of
Construction Principal is finally determined on September 15, 1997, Tenant shall
be obligated to pay to Landlord, with the first payment of Construction Rent due
on October 1, 1997, an amount

                                      -5-

<PAGE>   6
equal to the Construction Rent which would have been due and payable on July 1,
August 1 and September 1, 1997). In any event, Tenant's obligation to make
monthly payments of Construction Rent shall continue through and including the
day preceding the fourth (4th) anniversary of the Commencement Date in respect
of the First Amendment Additional Premises. Construction Rent shall not be
abated or reduced for any reason whatsoever (including, without limitation,
untenantability of any premises or termination of the Lease). Without limiting
the foregoing, the rent abatement provision of Section 12.1 of the Lease shall
not apply to Construction Rent. If there is any default (beyond the expiration
of any applicable grace periods) in any of Tenant's obligations under the Lease
(including, without limitation, its obligation to pay Construction Rent) or if
the Term of the Lease is terminated for any reason prior to the day preceding
the fourth (4th) anniversary of the Commencement Date in respect of the First
Amendment Additional Premises, Tenant shall pay to Landlord, immediately upon
demand, the unamortized balance of the Construction Principal. Tenant's
obligation to pay the unamortized balance of the Construction Principal shall be
in addition to all other rights and remedies which Landlord may have on account
or by reason of any default of Tenant under the Lease, and Tenant shall not be
entitled to any credit or reduction in such payment based upon amounts which may
be collected by Landlord from reletting the premises after the default of
Tenant.

     4.  LANDLORD'S TERMINATION RIGHT WITH RESPECT TO THE
         FIRST AMENDMENT ADDITIONAL PREMISES

     A.  Reference is made to the fact that the City and the Massachusetts
Department of Environmental Protection (the "DEP") have granted a waiver or
exception to the Planned Unit Development Special Permit and Chapter 91 License
(respectively) for the Building (collectively, the "Licenses") to permit the use
of the first Amendment Additional Premises for office use for a period of four
(4) years. Accordingly, if, at any time after the day preceding the fourth (4th)
anniversary of the Commencement Date in respect of the First Amendment
Additional Premises, the City, the DEP or any other governmental authority or
agency commences an action or proceeding or issues a notice, order or finding or
takes other action alleging that the use of the First Amendment Additional
Premises violates the provisions or conditions of the Licenses (or such waiver
or exception), or if Landlord, in its sole discretion, determines that Tenant's
occupancy of the First Amendment Additional Premises for office use after the
day preceding the fourth (4th) anniversary of the Commencement Date in respect
of the First Amendment Additional Premises may cause Landlord or the Building to
incur or be subject to fines, penalties, liability or other risk or harm,
Landlord shall provide Tenant with notice thereof and shall have the right,
upon not less than thirty (30) days written notice to Tenant, to terminate the
Term of the Lease in respect of the First Amendment Additional Premises and to
render the Lease in respect of the First Amendment Additional Premises void and
without further force or effect. Upon the exercise of such right by Landlord,
the Term of the Lease in respect of the First Amendment Additional Premises
shall be terminated as of the termination date set forth in such notice by
Landlord, at which time

                                      -6-

<PAGE>   7

Tenant shall vacate and surrender the First Amendment Additional Premises to
Landlord in the condition required by the Lease, including, without limitation,
Section 14.21 thereof, and Basic Rent and other charges due under the Lease in
respect of the First Amendment Additional Premises shall be apportioned as of
the effective termination date.

     B.  Tenant hereby agrees that it shall not initiate any contact with the
City, the DEP or any other governmental authority or agency with respect to
either of the Licenses (or such waiver or exception) or the use of the First
Amendment Additional Premises; not shall Tenant respond to any notice or other
communication issued to Tenant by or from the City, the DEP or such other
governmental authority or agency without prior written notice to Landlord and
an opportunity for Landlord to consult with Tenant with respect to the nature
of such response.

     C.  The provisions of this Paragraph 4 shall apply during the Term of the
Lease, including any applicable Extension Period.

     5.  RIGHT OF FIRST REFUSAL
         ----------------------

     Given the fact that Tenant is now leasing  the first (1st) and sixth (6th)
floors of  the Building, Paragraph 2 of Exhibit D to the Lease is hereby
deleted from the Lease in its entirety and shall be of no further force or
effect.

     6.  BROKER
         ------

     Tenant warrants and represents that Tenant has not dealt with any broker
in connection with the consummation of this First Amendment other than Avalon
Partners, Inc. and Beacon Management Company (collectively, the "Broker"). In
the event of any brokerage claims (other than by the Broker) against Landlord
or its agents predicated upon prior dealings with Tenant, Tenant agrees to
defend the same and indemnify Landlord and its agents from and against any such
claim and any loss, cost, expense (including, without limitation, reasonable
attorneys' fees) or damages with respect thereto or arising therefrom. Landlord
shall be responsible for the payment of brokerage commissions or fees due and
owing the Broker.

    As hereby amended, the Lease is ratified, confirmed and approved in all
respects.

                                      -7-

<PAGE>   8

     WHEREFORE, the parties have hereunto set their hands and seals as of the
date first written above.

LANDLORD:                                  TENANT:

BEACON PROPERTIES, L.P.                    ASPEN TECHNOLOGY, INC.

By:  Beacon Properties Corporation,
     General Partner

     By: /s/ Douglas S. Mitchell           By: /s/
        -----------------------------         --------------------------------
        Douglas S. Mitchell,                  (Name)               (Title)
        Senior Vice President                 Hereunto Duly Authorized

Date Signed:      6/16/97                  Date Signed:
            -------------------------                  -----------------------

                                      -8-

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