Exhibit 99.2
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock, par value $0.05 per share, of Willbros Group, Inc., a Delaware corporation, and that this agreement may be included as an exhibit to such joint filing.
IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of July 12, 2010.
| INFRASTRUX HOLDINGS, LLC | ||||||
By: Its: | TPF Power, Inc. Manager | |||||
| By: | /s/ Ryan T. Schroer | |||||
| Name: | Ryan T. Schroer | |||||
| Title: | Vice President | |||||
| TPF POWER, INC. | ||||||
| By: | /s/ Ryan T. Schroer | |||||
| Name: | Ryan T. Schroer | |||||
| Title: | Vice President | |||||
| TPF INFRASTRUX HOLDINGS, LLC | ||||||
By: Its: | TPF Power, Inc. Manager | |||||
| By: | /s/ Ryan T. Schroer | |||||
| Name: | Ryan T. Schroer | |||||
| Title: | Vice President | |||||
| TENASKA POWER FUND, L.P. | ||||||
By: Its: | Tenaska PF G, LLC General Partner | |||||
| By: | Tenaska PF, Inc. | |||||
| Its: | Manager | |||||
| By: | /s/ Ryan T. Schroer | |||||
| Name: | Ryan T. Schroer | |||||
| Title: | Vice President | |||||
| TENASKA PF G, LLC | ||||
| By: | Tenaska PF, Inc. | |||
| Its: | Manager | |||
| By: | /s/ Ryan T. Schroer | |||
| Name: | Ryan T. Schroer | |||
| Title: | Vice President | |||
| TENASKA PF, Inc. | ||||
| By: | /s/ Ryan T. Schroer | |||
| Name: | Ryan T. Schroer | |||
| Title: | Vice President | |||
