Staff sergeant stole £11,000 from bar at RAF Cranwell | This is Lincolnshire
Mr Dawson was sent to a Military Corrective Training Centre in Colchester, reduced to the ranks and dismissed from the service.
A Ministry of Defence spokesman said: "Staff Sergeant Mal Dawson, who served with the Military Provost Guard Service, was found guilty of theft at a court martial at Catterick.
"He was sentenced to 18 months detention at the Military Corrective Training Centre, Colchester, reduced to the ranks and dismissed from the service.
"The money he stole was from a bar on camp called the Cooler Club."