DMS Maritime, formerly Defence Maritime Services, is an Australian company providing port services to the Australian Defence Force and Australian Customs Service National Marine Unit. DMS was founded in 1997 and currently operates 8 oceangoing vessels and over 100 harbour craft and has around 350 staff. The services DMS is contracted to provide to the Royal Australian Navy (RAN) include operating tug boats and lighters at RAN bases, training members of the RAN, and maintaining the RAN warships.