An ammunition technical officer (ATO) is an officer involved in all aspects of the army, air force, and navy's use of ammunition. This includes: bomb disposal, clearance of ERW, explosives accident investigation, procurement, in service management, storage, and inspection and repair.

Bomb disposal is an explosives engineering profession using the process by which hazardous explosive devices are disabled or otherwise rendered safe. Bomb disposal is an all-encompassing term to describe the separate, but interrelated functions in the military fields of explosive ordnance disposal (EOD) and improvised explosive device disposal (IEDD), and the public safety roles of public safety bomb disposal (PSBD) and the bomb squad.