Document:

Letter to Key Employees

 Exhibit 10.31 
 Key Employee Special Bonus Agreement 
 This Key Employee Special Bonus Agreement (this “Agreement”) is made
and entered into as of March 14, 2006 by and between Employee’s Name (“you”) and Employee’s Business Unit (“Willbros” or the “Company”). 
 Bonus:    Willbros will pay you a bonus (the “Bonus”) in a total amount equal to         %
of your annualized base salary as in effect on the date of this Agreement. The Bonus will be payable in installments, on the terms and conditions described below. Provided you meet the eligibility conditions described in this Agreement, you will
receive installment payments of your Bonus, in the following percentages of the total Bonus amount and on the following dates, or within 30 days thereafter (at Willbros’ election): 
  

			
	 Date
	  	Percentage of Bonus Payable
	 March 14, 2006
	  	33.33%
	 March 14, 2007
	  	33.33%
	 March 14, 2008
	  	33.34%

 Bonus installments that you may become entitled to receive on March 14, 2007 and March 14, 2008 will
earn interest at the rate of 10% annually until the date of payment, provided you have met the eligibility conditions for payment as described below. All payments pursuant to this Agreement will be subject to any applicable withholding for taxes.

 General Eligibility Conditions:    Except as described in the following paragraph, you must be employed with Willbros or one of
its affiliates on the due date for a Bonus installment payment to receive that payment. If you terminate your employment with the Company or its affiliates or if the Company terminates your employment for Cause (as defined below), in either case
prior to the time any installment payment is due under this Agreement, you will forfeit your rights to receive all Bonus installments that were not payable to you prior to the date your employment was terminated. For purposes of this Agreement, the
term “Cause” means your gross negligence, willful misconduct, or significant fraud or illegal conduct in the performance of your duties with the Company. 
 Effect of Certain Terminations of Employment:    If the termination of your employment is due to your death, disability under circumstances that would entitle you to long term disability benefits under the
Willbros Long Term Disability Program (“Disability”) or Retirement (as defined in the 1996 Willbros Stock Plan), or Willbros terminates your employment for reasons other than Cause, the Compensation Committee of Willbros Group, Inc.’s
Board of Directors (the “Committee”) will determine, in its sole discretion, if any Bonus installments that were not yet payable to you when your employment terminated will nevertheless be paid to you. If your employment with the Company
is 

 
terminated in connection with a Change-In-Control (as defined in the Willbros Group, Inc. Severance Plan and the Willbros Management Severance Plan,
whichever applies to you) under circumstances that would entitle you to receive severance benefits under such plan, any unpaid Bonus installments will also be paid to you. Any Bonus installments that become payable as described in this paragraph,
will be paid to you, along with applicable interest to the date of payment, in a single lump sum as soon as practicable following the date of the Committee’s determination that they are payable or the date that the Change-in-Control occurs, as
applicable, but in no event later than two and one-half months after the end of the calendar year in which such date occurs. Notwithstanding the foregoing, the Company may delay any payment under this Agreement to the extent the Committee reasonably
believes such delay is necessary or appropriate in order to comply with or avoid the adverse tax consequences of Section 409A of the Internal Revenue Code of 1986, as amended, and you agree to execute any amendment to this Agreement that may be
required by the Company to provide for such delay. 
 Effect on Other Agreements:    This Agreement cannot be deemed to constitute
a contract of employment, nor will any provision hereof affect (i) your status as an employee at will of the Company or (ii) the terms and conditions of any other agreement between you and the Company or any of its affiliates. 

Confidentiality:    This Agreement is strictly confidential between you and Willbros. 
 Execution and Return of This Agreement:    Please execute this Agreement and return a signed copy of it to Dennis G. Berryhill at Willbros
USA, Inc. no later than March 31, 2006, acknowledging your understanding and acceptance of the terms of the Bonus awarded to you under this Agreement. 
  

	
	
	   
	 Dennis G. Berryhill
 Vice President &
Secretary
 Willbros USA, Inc.

 Employee’s Business Unit 
 I understand and accept the terms of this Agreement. 
  

			
	EMPLOYEE	  	
		
	  
 Employee’s Signature
	  	  
 DateFirst Amendment to Credit Agreement dated April 26, 2005

 Exhibit 10.12 
 FIRST AMENDMENT TO CREDIT AGREEMENT 
 This First Amendment to Credit Agreement (herein, the
“Amendment”) is entered into as of April 26, 2005, by and among Hyco Holdings LLC, a Delaware limited liability company (“Holdings”), Hyco Alabama LLC, a Delaware limited liability company
(“Alabama” and collectively with Holdings, the “Borrowers”), and Harris Trust and Savings Bank (the “Bank”). 
 PRELIMINARY STATEMENTS 
 A. The Borrowers and the Bank entered into that certain Credit Agreement,
dated as of December 29, 2004 (as amended, the “Credit Agreement”). All capitalized terms used herein without definition shall have the same meanings herein as such terms have in the Credit Agreement. 
 B. The Borrowers have requested that the Bank make certain amendments to the Credit Agreement. 
 NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows:

 SECTION 1. AMENDMENT. 
 Subject to the satisfaction of the conditions precedent set forth in Section 2 below, the Credit Agreement shall be and hereby is amended as follows: 
 1.1 Section 9.1(j) of the Credit Agreement shall be amended by deleting the text thereof and by inserting “[Intentionally
Omitted]” in lieu thereof. 
 SECTION 2. CONDITIONS PRECEDENT. 
 The effectiveness of this Amendment is subject to the satisfaction of all of the following conditions precedent: 
 2.1 The Borrowers and the Bank shall have executed and delivered this Amendment. 
 2.2 The Guarantors shall have consented to the execution and delivery of this Amendment. 
 2.3 Legal matters incident to the execution and delivery of this Amendment shall be reasonably satisfactory to the Bank and its counsel.

 SECTION 3. REPRESENTATIONS. 
 In order to induce the Bank to execute and deliver this Amendment, the Borrowers hereby represent to the Bank that, as of the date hereof, the
representations and warranties set forth in Section 6 of the Credit Agreement are and shall be and remain true and correct in all material respects (except to the extent that by their respective terms such representations and warranties relate
solely to a prior date), and the Borrowers are in compliance with the terms and conditions of the Credit Agreement and no Default or Event of Default has occurred and is continuing under the Credit Agreement or shall result after giving effect to
this Amendment. 
 SECTION 4. MISCELLANEOUS. 
 4.1 The Borrowers heretofore executed and delivered to the Bank the Security Agreement and certain other Collateral Documents. The Borrowers hereby
acknowledge and agree that the Liens created and provided for by the Collateral Documents (other than Liens on Collateral released in connection herewith) continue to secure, among other things, the Obligations arising under the Credit Agreement as
amended hereby; and the Collateral Documents and the rights and remedies of the Bank thereunder, the obligations of the Borrowers thereunder, and the Liens created and provided for thereunder remain in full force and effect and shall not be
affected, impaired or discharged hereby. Nothing herein contained shall in any manner affect or impair the priority of the liens and security interests created and provided for by the Collateral Documents as to the indebtedness which would be
secured thereby prior to giving effect to this Amendment. 
 4.2 Except as specifically amended herein, the Credit Agreement shall continue
in full force and effect in accordance with its original terms. Reference to this specific Amendment need not be made in the Credit Agreement, the Notes, or any other instrument or document executed in connection therewith, or in any certificate,
letter or communication issued or made pursuant to or with respect to the Credit Agreement, any reference in any of such items to the Credit Agreement being sufficient to refer to the Credit Agreement as amended hereby. 
 4.3 The Borrowers agree to pay on demand all reasonable costs and expenses of or incurred by the Bank in connection with the negotiation, preparation,
execution and delivery of this Amendment, including the reasonable fees and expenses of counsel for the Bank. 
 4.4 This Amendment may be
executed in any number of counterparts, and by the different parties on different counterpart signature pages, all of which taken together shall constitute one and the same agreement. Any of the parties hereto may execute this Amendment by signing
any such counterpart and each of such counterparts shall for all purposes be deemed to be an original. This Amendment shall be governed by the internal laws of the State of Illinois. 
 [SIGNATURE PAGE TO FOLLOW] 
  

 2 

 This First Amendment to Credit Agreement is entered into as of the date and year first above written.

  

					
	HYCO HOLDINGS LLC
		
	 By:
	 	 /s/ Craig Wolf

		 	 Name: 
	 	 Craig Wolf

		 	 Title:
	 	 CFO

  

					
	HYCO ALABAMA LLC
		
	 By:
	 	 /s/ Scott R. Humphrey

		 	 Name: 
	 	 Scott R. Humphrey

		 	 Title:
	 	 Treasurer

 Accepted and agreed to: 
  

					
	HARRIS TRUST AND SAVINGS BANK
		
	 By:
	 	 /s/ Jean R. Elie

		 	 Name: 
	 	 Jean R. Elie

		 	 Title:
	 	 V.P.

  

 3 

 ACKNOWLEDGMENT AND CONSENT 
 The undersigned each heretofore executed and delivered the Credit Agreement in the capacity of a Guarantor and delivered certain Collateral Documents.
Each of Ultrametal, Inc. and Hyco Canada U.L.C. (collectively the “Canadian Guarantors”) also delivered a Guaranty and Indemnity Agreement (the “Canadian Guaranty Agreements”) to guarantee the obligations of the
Borrowers under the Credit Agreement. Each of the undersigned hereby consent to the amendment to the Credit Agreement set forth above and confirm that its guaranty and the Collateral Documents executed and delivered by it, and all of the obligations
of the undersigned thereunder, remain in full force and effect. The Canadian Guarantors confirm that the Canadian Guaranty Agreements and all of the obligations of the Canadian Guarantors thereunder, remain in full force and effect. Each of the
undersigned further agrees that the consent of the undersigned to any further amendments to the Credit Agreement shall not be required as a result of this consent having been obtained. Each of the undersigned acknowledges that the Bank relying on
the assurances provided for herein in entering into the amendment set forth above. 
  

					
	HYCO CANADA HOLDINGS, INC.
		
	 By:
	 	 /s/ Craig Wolf

		 	 Name: 
	 	 Craig Wolf

		 	 Title:
	 	 CFO

  

					
	ULTRAMETAL INC.
		
	 By:
	 	 /s/ Scott R. Humphrey

		 	 Name: 
	 	 Scott R. Humphrey

		 	 Title:
	 	 Treasurer

  

					
	HYCO CANADA HOLDINGS, LLC
		
	 By:
	 	 /s/ Scott R. Humphrey

		 	 Name: 
	 	 Scott R. Humphrey

		 	 Title:
	 	 Treasurer

  

					
	HYCO CANADA U.L.C.
		
	 By:
	 	 /s/ Scott R. Humphrey

		 	 Name: 
	 	 Scott R. Humphrey

		 	 Title:
	 	 Treasurer

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