Major General Matthew John Holmes, CBE, DSO (29 June 1967 – 2 October 2021) was a British senior Royal Marines officer who served for more than three decades in the armed forces. After studying economics at the University of Exeter, he joined the Royal Marines and undertook early tours of duty to Norway, the Far East, Northern Ireland and Zimbabwe. After being deployed to Kosovo and Afghanistan, he commanded 42 Commando Royal Marines from 2006 to 2008 and was awarded a Distinguished Service Order for his leadership in Afghanistan. Holmes served as Commandant General Royal Marines from 2019 to 2021.