4 Oct 1833 Appointed Staff Assistant Surgeon vice Staff Assistant Surgeon Alexander Knox who became assistant surgeon 62nd Foot.
15 Nov 1833 Assistant Surgeon 64th (2nd Staffordshire) Regiment of Foot.
13 Dec 1838 Married Clara, daughter of H. Harrison Esq., at St George's Hanover Square. Had a son Kaid Maclean known as Sir Harry Aubrey De Vere Maclean who in the 1860s purchased an ensigncy in the 69th Foot, in which he obtained a company, and sold out at Gibraltar to take command of the Sultan of Morocco's bodyguard.
17 Sep 1839 Appointed Assistant Surgeon 11th Light Dragoons, vice Assistant Surgeon John Hutchison, promoted Surgeon 1st Foot. The subsequent vacancy in 64th Foot, was filled by Gentleman William Henry Brownson.
1 Mar 1844 Became Surgeon 76th Regiment of Foot.
2 Oct 1846 Exchanged with Staff Surgeon of the 2nd Class Robert Thomas Scott who moved to 76th Foot. Served at Chatham.
Malta 25 Dec 1848 Arrived at Malta.
Malta July 1849 Attended Lt Gen Robert Ellice, commander of the Malta garrison, at his palace in the Argotti Floriana, during a violent affliction of the liver which was reported as an attack of gout.
Malta 1850 Staff Surgeon 2nd Class.
Malta 12 Feb 1851 Left for Chatham following his appointment to the Provisional Battalion on 29 November 1850.
1 Oct 1858 Promoted Surgeon Major. Listed in the Melvilles 1858 Directory of Kent as Battalion Surgeon Chatham Barracks.
29 May 1867 Retired to half-pay with the Hon rank of Deputy Inspector General, having completed 34 years service on full pay.
1 Aug 1867–1877 Served as surgeon to the Royal Military College Sandhurst.
31 July 1880 Commuted his half-pay.
8 June 1908 Died at Charleville, Kew Gardens, aged 96 years. He left an estate valued at £2,756. By his will dated 27 May 1899, he left to his son General Sir Harry Aubrey de Vere Maclean KCMG, better known as Kaid Maclean, Colonel of the Sultan of Morocco's Bodyguard, his writing desk and its contents.