Cryptologic Technicians (Maintenance) (CTM) perform preventive and corrective maintenance on electrical and electronic cryptologic and ancillary systems used for communications, analysis, monitoring, tracking, recognition and identification, electronic attack, and physical security; install, test, troubleshoot, repair or replace cryptologic networks, physical security systems, electronic equipment, antennas, personal computers, auxiliary equipment, digital and optical interfaces, and data systems; configure, monitor, and evaluate Information Operations (IO), Information Warfare (IW) systems, and Information Assurance (IA) in support of national and fleet tasking; manage mission organizational level maintenance; coordinate repair of command, control, communications, computer and intelligence systems; and prepare reports and inventories of equipment.