Willbros to Present at the Calyon Energy Conference 2008

HOUSTON, TX -- (MARKET WIRE) -- 05/12/08 -- Willbros Group, Inc. (NYSE: WG) announced today that Management will present at the Calyon Energy Conference in New York to be held May 14-15, 2008.

The presentation will take place on Thursday, May 15, 2008, at 11:30 a.m. Eastern Time. The presentation is expected to last approximately 20 minutes. A live broadcast of the presentation will be available online on the Company's home page at www.willbros.com.

Willbros Group, Inc. is an independent contractor serving the oil, gas, power, refining and petrochemical industries, providing engineering and construction, turnarounds, maintenance, life cycle extension services and facilities development and operations services to industry and government entities worldwide. For more information on Willbros, please visit our website at www.willbros.com.

CONTACT: Michael W. Collier Vice President, Investor Relations Willbros USA, Inc. (713) 403-8016

Connie Dever Director Strategic Planning Willbros USA, Inc. (713) 403-8035

2008-05-12 18:23:02 0359419 MARKETWIRE