Willbros Enters Into New Credit Facility

HOUSTON, Oct. 27 /PRNewswire-FirstCall/ -- Willbros Group, Inc. announced today that it has entered into a new credit agreement with a group of investors led by Calyon Securities ("Calyon") for a $100 million three-year senior secured synthetic credit facility. The Company may elect to increase the total capacity under the facility to $150 million, with consent from Calyon. The facility, which includes a $25 million component for working capital, will be used for commercial letters of credit to support projects and for general corporate purposes. This facility replaces the Company's existing three-year $50 million bank facility, which was scheduled to expire in March 2007. Michael F. Curran, Chairman and Chief Executive Officer, remarked, "The combination of the closing today of our previously announced equity placement and new credit facility gives us the liquidity and flexibility to capitalize on the robust North American market and to perform the large volume of projects we currently have in backlog and to pursue those we expect to participate in over the next several years."

Willbros Group, Inc. is an independent contractor serving the oil, gas and power industries, providing construction, engineering and other specialty oilfield-related services to industry and government entities worldwide. The Company's World Wide Web site can be accessed at http://www.willbros.com/ .

This announcement contains forward-looking statements. All statements, other than statements of historical facts, which address activities, events or developments the Company expects or anticipates will or may occur in the future, are forward-looking statements. A number of risks and uncertainties could cause actual results to differ materially from these statements, including such things as future E&P capital expenditures, oil, gas, gas liquids and power prices and demand, the amount and location of planned pipelines, development trends of the oil, gas and power industries, changes in the political and economic environment of the countries in which the Company has operations, as well as other risk factors described from time to time in the Company's documents and reports filed with the SEC. The Company assumes no obligation to update publicly such forward-looking statements, whether as a result of new information, future events or otherwise.

CONTACT: Michael W. Collier Vice President - Investor Relations Willbros USA, Inc. [phone] Jack Lascar Partner DRG&E / [phone]