15 Aug 1906:           Officer, 4th Battalion, Devonshire Regiment (Special Reserve).

28 Jun 1908:           Officer, 3rd Battalion, Devonshire Regiment (Special Reserve).

17 Mar 1909:           Officer, Highland Light Infantry. (RAeC Certificate No 483)

xx xxx 1913:            Attended Central Flying School.

17 Dec 1913:           Pilot, No 4 Sqn RFC. (Various types – Netheravon/Western Front)

15 Jan 1915:            Flight Commander, No 10 Sqn RFC. (BE2c, BE2d – UK/Western Front)

 1 Jun 1916:            Officer Commanding, No 10 Sqn RFC. (BE2c, BE2d – Western Front)

18 Dec 1916:           Officer Commanding, 12th (Corps) Wing RFC.

  9 Jul 1918:             Officer Commanding, No 20 Group.

 1 Aug 1919:            Awarded Permanent Commission as a Lieutenant Colonel

 6 Jan 1920:             Officer Commanding, No 52 (Corps) Wing. (India)

 1 Apr 1920:            Officer Commanding, No 3 (Indian) Wing. (re-designated No 1 (Indian) Wing)

10 Jul 1920:             Officer Commanding, No 1 (Indian) Wing, Wiziristan.

28 Mar 1924:          Officer Commanding, No 1 FTS.

19 Jan 1925:           Group Captain - Admin, HQ RAF Halton./OC No 1 SoTT (Boys)

 8 Mar 1928:           Officer Commanding, Aden Command.

 4 Oct 1929:            Director of Training.

30 Jan 1933:           AOC, RAF Cranwell/Commandant, RAF College.

31 Dec 1934:          AOC, British Forces in Iraq.

 1 Jul 1937:             Air Member for Personnel.

xx xxx 1938:            Supernumerary, HQ No 6 (Auxiliary) Group.

23 Mar 1939:          AOC in C, RAF Middle East.

24 May 1940:          Inspector-General of the RAF.

 1 Oct 1941:            Reverted to Retired List retaining the rank of Air Chief Marshal.

26 Sep 1941            Appointed Gentleman Usher of the Black Rod

13 Jul 1942:             Appointed to commission in Class CC of RAFO, Admin and Special Duties branch

xx xxx 1942 - 15 Aug 1944:            Commandant, London Command - ATC.

Born in Sydney, New South Wales and educated at Wellington College, he join the Army in 1909 after serving with the Militia.  He was awarded RAeC No 483 on 17 May 1913.  Retiring from the RAF in 1941, he became the first RAF officer to hold the post of 'Black Rod' in the House of Lords.  With the expansion of the Air Training Corps following it's formation in 1941, there became a growing need for decentralising the command structure as a result of which he was appointed Commandant of London Command in 1942, a post he held until his death at the early age of 56 from a heart attack.  

Citation for the award of Commander of the Order of the British Empire

"MITCHELL, William Gore Sutherland, W/C, DSO, MC, AFC 

This officer was in command of the Royal Air Force squadrons during the operations from the 15th December 1922 to April 1923, during which time these squadrons were continuously employed. He was of the greatest assistance to directing the operations of the Royal Air Force against the hostile tribesmen. During later operations he controlled the contact work of the Royal Air Force with the infantry with great ability, and maintained the efficiency of his squadrons in spite of continuous and heavy calls on his men and machines."

(Source: Air 30/58)