Warren retired in 2012 after 50 years as Chief Engineer at WKFM, WFYR, and WLS AM & FM. Warren was a life member of IEEE (Institute of Electronic Electrical Engineers), life member of SBE (Society of Broadcast Engineers), member of NARTE (National Association of Radio & Television Engineers), member of AES (Audio Engineering Society). He was also past board member of FEMA (radio division). Ham Radio Operator WA9GXZ.
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I think the above mentioned Brad Norling is also known as Brad Collins and he is the son of former Chicago broadcaster Stu Collins.