Willbros Group—an independent contractor serving the oil, gas, power, refining and petrochemical industries—has announced the upcoming retirement of Ron Lefaive from his roles as vice president of accounting and tax, and corporate controller, effective at the end of 2012.

In other news, Ed Vasquez has been appointed to the position of tax director, with responsibility for direction and oversight of all income tax functions.

On the heels of Lefaive's retirement, Willbros announced that it is undergoing a search for a new chief accounting officer in order to address “the increased complexity and size of the company's operations.” The CAO also will serve as corporate controller and report to Executive Vice President and CFO Van Welch.