Pentastar Aviation or ADI would be a good start, DaimlerChrysler no longer has a flight department, Pentastar manages their fleet now and they are a whole different animal! A few corporate departments on the NW corner of the field, Royal Air on the NE corner, IFL on the south side between Pentastar to the west and ADI east. Tradewinds further east on the south side also. Not much happening at DTW, do a search on YIP, they have some activity on the freight side. I'd say corporate is dead in Detroit, only to get worst in the near term.....