Willbros Group, Inc. was a global engineering and contractor company based in Houston, Texas, United States.

[3] On 28 February 2005, Willbros Group Inc., said that it was restating financial reports from 2002 on and forecast 2005 earnings far below Wall Street estimates.

[4] On 14 May 2008, the United States Securities and Exchange Commission filed a suit against Willbros Group and its former managers due to multiple violations of the Foreign Corrupt Practices Act in Nigeria, Ecuador and Bolivia in 2003–2005.

[5][6] In 2010, Willbros expanded its activities from the oil and gas industry services to the electric transmission and distribution market by the acquisition of InfrastruX Group for about $480 million.

[9] In March 2018, Primoris Services Corporation announced [10] that it will acquire Willbros Group, with the transaction expected to be completed in the second quarter of 2018.