Greg Petrowich is currently the Executive Director of WSIU Public Broadcasting on the campus of Southern Illinois University Carbondale, Illinois. He oversees the operation of WSIU's three public radio stations (WSIU – WUSI – WVSI) two PBS stations (WSIU – WUSI) and the Southern Illinois Radio Information Service. WSIU Public Broadcasting is integrated into the College of Mass Communication and Media arts at SIU where students gain experience in every aspect of the broadcasting service.

Prior to taking the helm of WSIU in April, 2009, Petrowich was the General Manager of KUAC FM and TV in Fairbanks, Alaska, where he served for seven years as the chief executive for public broadcasting at the University of Alaska. KUAC operates a series radio and television stations serving Alaska's interior. In addition to his capacity at KUAC, Petrowich served as President of AlaskaOne Public Television, providing statewide public television service throughout rural Alaska.

Between 1991 and 2002, Petrowich worked at KRCU in Cape Girardeau, Missouri, where he served first as Operations Director and later as General Manager. KRCU is licensed to Southeast Missouri State University. During his tenure he guided the station through two signal upgrades and implemented plans to build two full-power repeater stations in an effort to enhance public broadcast service in the largely underserved southeast Missouri region.

Petrowich received a Bachelor of Arts degree in Radio/Television from Southern Illinois University Carbondale. He currently serves on the board of directors for National Public Radio and the Rotary Club of Carbondale - Breakfast. His prior non-profit board experience includes: the Alaska Public Radio Network, Alaska Broadcasters Association, Fairbanks Montessori School, and Fairbanks Downtown Rotary Club.