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

In other news, Ed Vasquez has been appointed to the position of tax director. He will be responsible for the 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.