The 52nd Ordnance Group (EOD) is the command and control headquarters for all U.S. Army Explosive Ordnance Disposal (EOD) Battalions and Companies located east of the Mississippi River in the Continental United States (CONUS). The current command team consists of Colonel Gregory J. Hirschey and Command Sergeant Major Michael C. Gray. Their command covers 184th and 192nd Ordnance Battalion (EOD), as well as the 63rd Chemical Company (CBRN). Subordinate units maintain EOD Response Teams, which evaluate, render safe, and remove conventional, chemical/biological, or nuclear ordnance, or improvised explosive devices (IEDs) which pose an immediate threat to public safety. While subordinate units are trained and equipped for combat operations, they may also support a variety of peacetime missions