John C. Robak has been appointed to the Commerce Advisory Council for the College of Commerce at DePaul University. Robak, 43, is executive vice president and chief operating officer for Greeley and Hansen, an environmental engineering and architectural consulting firm headquartered in Chicago, and a 1989 graduate of DePaul. The council comprises Chicago business leaders who advise the dean on matters including curricula of the college. Robak has more than 20 years of human resources and operations management experience for professional services organizations including GolinHarris. Besides a B.S. in commerce and human resources from DePaul, Robak has an MBA from Loyola University Chicago.