Rear Admiral Stephen Richard "Steve" Gilmore (born 17 January 1961) is a senior officer in the Royal Australian Navy. He served as Commander Australian Fleet from October 2009 until December 2011. Since January 2014, Gilmore has served as the Head Australian Defence Staff (Washington) and Australian Defence Attaché at the Embassy of Australia, Washington, D.C.
Gilmore joined the Royal Australian Navy as a junior entry cadet midshipman in 1977. After receiving his full Bridge Watchkeeping Certificate in 1983, he was posted as an Officer of the Watch in the then RAN Flagship, HMAS Stalwart (AD215). This was followed by service as the Executive Officer of the Cairns-based Patrol Boat HMAS Townsville (PB205) in 1985–86.
On completion of the Principal Warfare Officer's course and sub specialist training in gunnery and air warfare, Lieutenant Gilmore completed three consecutive postings at sea as PWO(A)/Operations Officer in both Australian and British warships. In 1992–94, he was the Fleet Gunnery Officer and in the Sea Training Group. He was subsequently posted as the Executive Officer of the Guided Missile Frigate HMAS Melbourne (FFG05) in 1994–96.
Promoted to commander in 1996, he was appointed the RAN Liaison Officer to the US Navy Doctrine Command in Norfolk, Virginia. On return to Australia, Commander Gilmore was posted to Maritime HQ as Commander Plans (N51) during 1998–99. This most challenging and rewarding position involved the planning for all ADF and RAN operations and exercises involving major fleet units. He was awarded the Conspicuous Service Cross in the 2000 Queens Birthday Honours list for his service in this role.
Gilmore assumed command of the ANZAC class frigate HMAS Arunta (FFH151) in 2000. In addition to major Task Group deployments, a highlight of this period was the award of the prestigious Gloucester Cup, which recognised Arunta as the Navy's best major fleet unit in 2000.
Promoted to Captain in 2001, he attended the Defence and Strategic Studies Course at the Australian Defence College during 2002 and graduated with a Master of Arts in Strategic Studies. Captain Gilmore was appointed as the Director of Maritime Combat Development in the Capability Systems Division of Australian Defence Headquarters in December 2002. In this capacity he was responsible for the development of capability requirements documentation relating to the eventual acquisition of future ship and combat systems for the Royal Australian Navy.
Gilmore was promoted commodore in January 2005 and appointed to the position of Director General Navy Strategic Policy and Futures (DGNSPF) in Navy Headquarters. Selected to command coalition Task Force 58 in the Northern Persian Gulf, Gilmore was deployed as part of Operation CATALYST from April to August 2005. With a small RAN staff, Gilmore embarked on the cruisers USS Antietam (CG54) and USS Normandy (CG60) and was responsible for the conduct of all maritime security operations. He returned to the DGNSPF position in September 2005. CDRE Gilmore was appointed a Member of the Order of Australia (AM) in the 2006 Queens Birthday Honours list in recognition of his service as Commander Task Force 58.
In September 2007, Gilmore became Commander, Navy Systems Command, a position which was phased out in July 2009. Promoted to rear admiral in June 2008, he served as Fleet Commander Australia from October 2009 until December 2011. Gilmore occupied the position of Deputy Chief of Joint Operations from December 2011 until November 2013. Since then, he has served as the Head Australian Defence Staff (Washington) and Australian Defence Attaché at the Embassy of Australia, Washington DC.