Document:

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                                                                   EXHIBIT 10.33

                                SECOND AMENDMENT

                  SECOND AMENDMENT TO THE CREDIT AGREEMENT (this "Amendment"),
dated as of April 14, 2000, among UNIVERSAL COMPRESSION HOLDINGS, INC.
("Holdings"), UNIVERSAL COMPRESSION, INC. (the "Borrower"), various lenders
party to the Credit Agreement referred to below (the "Banks") and BANKERS TRUST
COMPANY, as Agent (the "Agent"). All capitalized terms used herein and not
otherwise defined herein shall have the respective meanings provided such terms
in the Credit Agreement referred to below.

                                   WITNESSETH:

                  WHEREAS, Holdings, the Borrower, the Banks and the Agent are
parties to a Credit Agreement, dated as of February 20, 1998 (as amended,
modified or supplemented to, but not including, the date hereof, the "Credit
Agreement");

                  WHEREAS, Holdings and the Borrower have requested that the
Banks waive certain provisions of the Credit Agreement as herein provided and
the Banks have agreed to such waivers to the extent provided herein; and

                  WHEREAS, the parties hereto wish to amend the Credit Agreement
as herein provided;

                  NOW, THEREFORE, it is agreed:

                  1. Section 9.05 of the Credit Agreement is hereby amended by
(x) deleting the text "and" appearing at the end of clause (x) of said Section,
(y) deleting the period at the end of clause (xi) of said Section and inserting
the text "; and" in lieu thereof and (z) inserting the following new clause
(xii) at the end of said Section.

                   "(xii) the Borrower and its Subsidiaries may effect Permitted
         Section 9.02(viii) Acquisitions in accordance with the requirements of
         Section 9.02(viii)."

                  2. Pursuant to Section 9.14 of the Credit Agreement, and
subject to the provisions of Section 9.02(viii) of the Credit Agreement, the
Banks party hereto hereby authorize:

                  (i) the acquisition of 100% of the capital stock of Spectrum
         Rotary Compression Inc. by the Borrower as described in the Form S-1
         Registration Statement filed by Holdings with the Securities and
         Exchange Commission on April 5, 2000, provided that, within 60 days
         after the closing of such acquisition, Holdings and the Borrower shall
         cause Spectrum Rotary Compression Inc. to either (x) merge into the
         Borrower or any Subsidiary Guarantor or (y) execute and deliver to the
         Agent, (I) a counterpart of the Subsidiaries Guaranty in the form of
         Exhibit I to the Credit Agreement, (II) counterparts of the Pledge
         Agreement and Security Agreement and (III) an officer's certificate,

                                     - 1 -
<PAGE>   2

         together with Exhibits A, B and C thereto, in the form of Exhibit F to
         the Credit Agreement; and

                  (ii) the formation of Universal Compression de Mexico SA de CV
         and a second entity, both Wholly-Owned Subsidiaries of the Borrower
         organized under the laws of Mexico, in connection with the sale and/or
         leasing, operations and servicing of compressors in Mexico.

In addition, the Banks hereby waive the provision of Section 9.14 requiring
prior written consent of the Required Banks solely inasmuch as such provision
relates to the acquisition and/or formation of the new Subsidiaries described
above in this paragraph 2.

                  3. In order to induce the Banks to enter into this Amendment,
Holdings and the Borrower hereby represent and warrant that (i) no Default or
Event of Default exists on the Second Amendment Effective Date (as defined
below), both before and after giving effect to this Amendment, and (y) on the
Second Amendment Effective Date, and both before and after giving effect to this
Amendment, all representations and warranties contained in the Credit Agreement
and in the other Credit Documents are true and correct in all material respects
as though such representations and warranties were made on the Second Amendment
Effective Date (it being understood and agreed that any representation or
warranty which by its terms is made as of a specified date shall be required to
be true and correct in all material respects only as of such date).

                  4. This Amendment is limited as specified and shall not
constitute a modification, acceptance or waiver of any other provision (or of
any provision beyond the specific waivers granted herein with respect to such
provision) of the Credit Agreement or any other Credit Document.

                  5. This Amendment may be executed in any number of
counterparts and by the different parties hereto on separate counterparts, each
of which counterparts when executed and delivered shall be an original, but all
of which shall together constitute one and the same instrument. A complete set
of counterparts shall be delivered to the Borrower and the Agent.

                  6. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW
OF THE STATE OF NEW YORK.

                  7. This Amendment shall become effective on the date (the
"Second Amendment Effective Date") when Holdings, the Borrower and the Required
Banks shall have signed a counterpart hereof (whether the same or different
counterparts) and shall have delivered (including by way of facsimile
transmission) the same to the Agent at the Notice Office.

                  8. From and after the Second Amendment Effective Date, all
references in the Credit Agreement and each of the other Credit Documents to the
Credit Agreement shall be deemed to be references to the Credit Agreement as
amended hereby.

                                      * * *

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<PAGE>   3

                  IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

                                   UNIVERSAL COMPRESSION HOLDINGS, INC.

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   UNIVERSAL COMPRESSION, INC.

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   BANKERS TRUST COMPANY,
                                     Individually and as the Agent

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   [BANK OF SCOTLAND

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   CREDIT LYONNAIS NEW YORK BRANCH

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                     - 3 -
<PAGE>   4

                                   FIRST NATIONAL BANK OF COMMERCE

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   FIRST UNION NATIONAL BANK

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   ABN AMRO BANK N.V.

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   BANQUE PARIBAS

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                     - 4 -

<PAGE>   5

                                   WELLS FARGO BANK (TEXAS)
                                     NATIONAL ASSOCIATION

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   UNION BANK OF CALIFORNIA, N.A.

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   SOCIETE GENERALE,
                                     SOUTHWEST AGENCY

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                   THE BANK OF NOVA SCOTIA]

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

                                     - 5 -ESI EXECUTIVE DEFERRED BONUS COMPENSATION PLAN

 
  
 

 Exhibit 10.22 

 ESI EXECUTIVE
 

 DEFERRED BONUS COMPENSATION PLAN

 ARTICLE I

 Nature and Purpose of Plan

      1.1  Nature. The Plan is
   established by the Company as an unfunded, non-qualified deferred
   compensation plan for a select group of management and highly compensated
   employees of the Company.

      1.2  Purposes. The
   purpose of the Plan is to provide Eligible Employees with an opportunity to
   defer all or a portion of their Bonus.

 ARTICLE II

 Definitions and Rules of Construction

      2.1  Definitions. As used in
   the Plan, the following words and phrases, when capitalized, have the
   following meanings:

 
             (a)
   "Account" means a bookkeeping account reflecting the amount of a
   Participant's Bonus deferred under the Plan and, where applicable, interest
   credited on deferred amount.

           (b)
   "Beneficiary" means the person or persons designated to receive
   benefits under the Plan in the event of the Participant's death.

           (c)
   "Board" means the Board of Directors of the Company.

           (d)
   "Bonus" means the annual bonus compensation earned by an Eligible
   Employee for a Plan Year under the Bonus Plan.

           (e) "Bonus
   Plan" means, with respect to a calendar year, the annual incentive
   bonus plan established by the Company.

 

 
             (f)
   "Cash Bonus" means, with respect to an Eligible Employee for a
   Plan Year, the portion of the Eligible Employee's Bonus that is payable in
   Cash under the terms of the Bonus Plan.

           (g)
   "Code" means the Internal Revenue Code of 1986, as amended from
   time to time, and interpretive rules and regulations.

           (h)
   "Committee" means the committee appointed by the Company pursuant
   to Article IV to administer the Plan.

           (i)
   "Company" means ITT Educational Services, Inc.

           (j)
   "Deferred Cash Account" means the Account maintained by the
   Company to reflect the amount of Cash Bonus and interest credited to a
   Participant's Account pursuant to Section 5.2.

           (k)
   "Deferred Share Account" means the Account maintained by the
   Company to reflect the Shares and dividends credited to a Participant's
   Account pursuant to Section 5.3.

           (l)
   "Effective Date" means March 15, 2000.

           (m)
   "Eligible Employee" means an Employee who is (1) a highly
   compensated employee within the meaning of Code subsection 414(q), and (2)
   designated by the Board of Directors pursuant to Article III as a key
   management employee who is eligible to participate in the Plan.

           (n)
   "Employee" means any person employed by ESI as a salaried
   employee, who receives compensation from ESI that is initially reported on a
   federal wage and tax statement (Form W-2).

           (o)
   "ESI" means the Company and all Related Employers.

           (p)
   "Exchange Act" means the Securities Exchange Act of 1934, as
   amended.

           (q) "Fair
   Market Value" means, with respect to Shares, the last sale price on the
   applicable date (or if there is no reported sale on such date, on the
   last preceding date on which any reported sale occurred) of one Share
   on the principal exchange on which the Shares are listed, or if not listed
   on any exchange, on the Nasdaq National Market System or any similar system
   then in use, or if the Shares are not listed on the Nasdaq National Market
   System, the mean between the closing high bid and low asked quotations
   of one Share on the date in question as reported by Nasdaq or any similar
   system then in use, or, if no quotations are available, the Fair Market
   Value on such date of one Share as the Board shall determine.

 

 

 
             (r)
   "Participant" means an Eligible Employee who elects to defer all
   or a portion of his Bonus under the Plan.

           (s)
   "Plan" means the ESI Executive Deferred Bonus Compensation Plan,
   as set forth in this document, as amended from time to time.

           (t) "Plan
   Year" means (1) the period beginning on the Effective Date and ending
   on December 31, 2000, and (2) each subsequent calendar year.

           (u)
   "Related Employer" means an employer that, together with the
   Company, is a part of a controlled group of trades or businesses within the
   meaning of Code subsection 414(b) or (c) or part of an affiliated service
   group within the meaning of Code Section 414(m).

           (v)
   "Share" means the $.01 par value common stock of the Company.

           (w) "Stock
   Bonus" means, with respect to an Eligible Employee for a Plan Year,
   that portion of the Eligible Employee's Bonus that is payable in Shares
   under the terms of the Bonus Plan.

 

      2.2  Rules of Construction. The
   following rules of construction will govern in interpreting the Plan:

 
             (a) Words
   used in the masculine gender will be construed to include the feminine
   gender, where appropriate.

           (b) Words used
   in the singular will be construed to include the plural, where appropriate,
   and vice versa.

           (c) If any
   provision of the Plan will be held to be illegal or invalid for any reason,
   that provision shall be deemed to be null and void, but the invalidation of
   that provision will not otherwise impair or affect the Plan. 

 

 ARTICLE III

 Eligibility and Participation

      3.1  Eligibility. The Plan is
   intended to be an unfunded plan of deferred compensation for a select group
   of management and highly compensated Employees. An Employee will be an
   Eligible Employee and thereby eligible for membership in this Plan only if
   (1) the Employee is a highly compensated employee within the meaning of
   Code subsection 414(q); (2) the Employee is designated by the
   Compensation Committee of the Board of Directors as a key management
   employee who is eligible to participate.

 

      3.2  Participation. An Eligible
   Employee will become a Participant by filing an election form in accordance
   with the provisions of Section 5.1. A Participant will remain a Participant
   until the Participant has received all payments to which the Participant is
   entitled under the terms of the Plan.

 ARTICLE IV

 Plan Administration

      4.1  The Committee. The Plan
   will be administered by the ESI Employee Benefits Administration and
   Investment Committee.

      4.2  Authority of the
   Committee. The Committee has sole discretion to make all
   determinations that may be necessary or advisable for the administration of
   the Plan, including the discretionary authority to interpret the provisions
   of the Plan. All determinations and decisions made by the Committee pursuant
   to the provisions of the Plan, and all related orders or resolutions of the
   Board, shall be final, conclusive and binding upon all persons, including
   the Company, ESI, Participants, and their estates and beneficiaries.

      4.3  Section 16 Compliance. It
   is the intention of the Company that the Plan and the administration of the
   Plan comply in all respects with Section 16(b) of the Exchange Act and the
   rules and regulations promulgated thereunder. If any Plan provision, or any
   aspect of the administration of the Plan, is found not to be in compliance
   with Section 16(b) of the Exchange Act, the provision or administration will
   be deemed null and void, and in all events the Plan will be construed in
   favor of meeting the requirements of Rule 16b-3 promulgated under the
   Exchange Act.

 ARTICLE V

 Deferral Elections

      5.1  Making of Election. Prior
   to the beginning of each Plan Year, each Eligible Employee may elect in
   writing, in the manner and on the form prescribed by the Committee, to defer
   payment of all or a portion of the Executive's Cash Bonus and Stock Bonus
   for the Plan Year, provided that any deferral of Cash Bonus pursuant to this
   Section must be made in increments of 25%, and any deferral of Stock Bonus
   pursuant to this Section must be made in increments of 25%. Notwithstanding
   the foregoing, the Committee, in its sole discretion, may permit a new
   Eligible Employee to enroll in the Plan during the Plan Year in which he
   first becomes an Eligible Employee, no later than 30 days after becoming an
   Eligible Employee, and make an election to defer all or a portion of the
   Executive's Bonus for that Plan Year. An Eligible Employee's election to
   defer a portion of his Bonus for a Plan Year must specify the payment option
   selected by the Eligible Employee pursuant to Section 6.1. Any election made
   by an Eligible Employee pursuant to this Section for a Plan Year will be
   irrevocable. 

 

      5.2  Deferred Cash Account. A
   Participant's Deferred Cash Account will be credited with the Cash Bonus
   deferred on behalf of the Participant pursuant to Section 5.1, as of the
   date the Cash Bonus would have been paid to the Participant in the absence
   of a deferral election. Interest will be credited to each Deferred Cash
   Account at the rate of six percent (6%) compounded annually. This assumed
   interest shall be compounded annually and treated as earned from the date
   deferred cash is credited to the Deferred Cash Account to the date of
   distribution.

      5.3  Deferred Share Account. A
   Participant's Deferred Share Account will be credited with that number of
   Shares otherwise payable to the Eligible Employee pursuant to the Bonus
   Plan, but deferred under Section 5.1, as of the date the Shares would
   have been issued to the Participant in the absence of a deferral election. A
   Participant's Account will also be credited with any cash dividends
   attributable to the number of Shares credited to the Participant's Deferred
   Share Account as of the record date set by the Board for the payment of
   dividends. Each January 1 and July 1, additional Shares will be credited to
   a Participant's Share Account equal to the whole number obtained by dividing
   the amount of cash credits in the Participant's Share Account as of that
   date by the Fair Market Value of Shares on that date.

      5.4  Annual Statement. Within
   90 days following the end of each Plan Year, the Company shall provide to
   each Participant a written statement reflecting the amount of cash and
   Shares credited to the Participant's Accounts.

 ARTICLE VI

 Payment of Deferred Amounts

      6.1  Payment Options. In each
   election that a Participant makes pursuant to Section 5.1, the Participant
   will elect a payment option from the payment options described below. The
   payment options from which the Participant may choose are the following:

 

 		(a)	     	a lump sum payable as soon as administratively possible after
     Participant terminates employment for any reason; or

 
 		(b)	     	a lump sum payable in January of the calendar year irrevocably
     designated by the Participant at the time he files his written election
     under Section 5.1, which can be no earlier that the second calendar year
     after the year in which the Bonus is determined.

 

 If a Participant fails to elect a payment option, the Participant will be
   deemed to have elected the payment option specified in Paragraph (a) above.
   In all cases, payment from a Participant's Deferred Cash Account will be
   made in cash, and payment from a Participant's Deferred Share Account will
   be made in Shares, except for any remaining cash dividends credited to the
   Deferred Share Account, which will be paid in cash.

 

      6.2 Payment Upon Death. If a
   Participant dies before all amounts due to him under the Plan have been
   paid, then within a reasonable time following the Participant's death, the
   unpaid balance credited to a Participant's Accounts will be paid in a lump
   sum to the Participant's Beneficiary. Payment from the Participant's
   Deferred Cash Account will be made in cash, and payment from a Participant's
   Deferred Share Account will be made in Shares, except for any remaining cash
   dividends credited to the Deferred Share Account, which will be paid in
   cash. A Participant may designate a Beneficiary or Beneficiaries under the
   Plan to receive payment of the Participant's Accounts upon the Participant's
   death by submitting a Beneficiary designation form to the Committee, in the
   form and manner provided by the Committee. If no designated Beneficiary or
   Beneficiaries survive the Participant, payment of the Participant's Accounts
   will be made to the Participant's estate.

 ARTICLE VII

 Miscellaneous

      7.1  Assignability. No right to
   receive payments under this Plan will be transferable or assignable by a
   Participant except by will or by the laws of descent and distribution.

      7.2  Amendment or Termination.
   The Board may at any time and from time to time and in any respect amend or
   modify this Plan; provided, however, that the Board may not amend this Plan
   more than once during any six-month period, and provided further, that any
   amendments requiring shareholder approval in order to maintain the exemption
   of the Plan under the Exchange Act), as in effect from time to time, shall
   be subject to approval by the shareholders of the Company in the manner
   required by the Rule. No amendment, modification or termination of the Plan
   will, without the consent of a Participant, reduce the benefits that a
   Participant has already accrued under the Plan.

      7.3  Participant's Rights
   Unsecured. The right of any Participant to receive payment of
   deferred amounts under the provisions of the Plan will be an unsecured claim
   against the general assets of the Company. The maintenance of individual
   Participant Accounts is for bookkeeping purposes only. The Company is not
   obligated to acquire or set aside particular assets for the discharge of its
   obligations, nor will any Participant have any property rights in any
   particular assets held by the Company, whether or not held for the purpose
   of funding the Company's obligations under the Plan.

      7.4  Tax Withholding. The
   Company will withhold from any payment made under the Plan such amounts as
   may be required by applicable federal, state, or local laws.

      7.5  Governing Law. To the
   extent not preempted by federal law, this Plan will be governed by, and
   construed in accordance with, the laws of Indiana, with regard to its
   conflict of law rules.

  

      IN WITNESS WHEREOF, the Company has caused
   the Plan to be executed this 16th
 day of February, 2000.

 	 	 ITT EDUCATIONAL SERVICES, INC.

   
	 	 
	 	By:  /s/ Clark D. Elwood 
	 	 
	 	Printed Name:  Clark D. Elwood 
	 	 
	  	 Title: Senior
     Vice President, General Counsel 
   

           and Secretary

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