Willbros Names Randy Harl CEO as Successor to Mike Curran

Willbros Group says that its Chairman and Chief Executive Officer, Michael F. Curran (65), will transfer his duties as Chief Executive Officer on January 1, 2007, to Randy Harl (55). Mr. Harl is currently President and Chief Operating Officer and will continue in those roles. This transition is pursuant to the Company's long standing succession planning process.

Mr. Curran, who will continue to serve as Chairman of the Board, commented, "I look forward to continuing my association with the Company as a member of the Board, and I am confident in Randy's ability to lead Willbros to new and higher levels of achievement as we continue to grow and expand our business."

Mr. Harl stated, "I am pleased Mike will remain with us to continue to offer his expertise to the organization. We are currently presented with tremendous growth opportunities. Our focus is on returning Willbros to profitability through project execution excellence and cost control discipline and we are in the process of developing new business strategies to bring additional value to Willbros and its shareholders. I am impressed with the caliber and experience of the people in our organization, and I am delighted to have the chance to lead this Company."

Mr. Harl joined Willbros in January 2006 when he became an executive officer and director of the Company following an engagement as a consultant to the Company from August 2005. He has over 30 years experience with Kellogg Brown & Root ("KBR"), having served as Chairman, CEO and President after working in a variety of officer capacities, and serving as President of several of KBR's business units.