The Duke of York is a Vice Admiral in the Royal Navy and holds two naval service appointments:
- Commodore in Chief, Fleet Air Arm, since 2006
- Admiral of the Sea Cadet Corps, since 1992
His Royal Highness also holds appointments in the British Army:
- Deputy Colonel-in-Chief of The Royal Lancers (Queen Elizabeths’ Own) since 2015
- The Colonel of The Grenadier Guards since 2017
- Colonel in Chief, The Royal Highland Fusiliers since 2003 and since 2006, Royal Colonel, The Royal Highland Fusiliers, 2nd Battalion The Royal Regiment of Scotland.
- Colonel in Chief, The Yorkshire Regiment (14th/15th, 19th and 33rd/76th Foot) since 2006
- Colonel in Chief, The Royal Irish Regiment (27th (Inniskilling), 83rd, 87th and The Ulster Defence Regiment) since 1992
- Colonel in Chief, Small Arms School Corps since 2003
And in the Royal Air Force:
- Honorary Air Commodore, RAF Lossiemouth, since 1996
His Royal Highness also holds appointments in the Commonwealth:
Canada:
- Colonel in Chief, The Queen’s York Rangers (1st American Regiment) since 1999
- Colonel in Chief, The Royal Highland Fusiliers of Canada since 2003
- Colonel in Chief, The Princess Louise Fusiliers since 2003
New Zealand:
- Colonel in Chief, Royal New Zealand Logistics Regiment since 1996
