William L. Robertson has been named president and CEO of Weston Solutions Inc., the West Chester, Pa., sustainability consultant, a spokeswoman told ENR on March 18.


He replaces Patrick G. McCann, who was president and CEO since 2003 and chairman since 2008; McCann has left the firm. Weston provided no details on what triggered the change. Robertson was Weston CEO from 1997 to 2003 and chairman for six years.

Great Lakes Dredge & Dock Corp., Oak Brook. Ill., said on March 14 that President and Chief Operating Officer Bruce J. Bierneck has left the firm. He had been a company director. Bierneck exits as Great Lakes, the largest U.S. dredging services firm, released year-end results that it said may have overstated revenue. On March 18, the firm told ENR the positions would not be filled at this time.