Malcolm, sometimes known as Mark, was a son of Murdoch and Elizabeth Campbell of Wallangra, north of Inverell NSW. He was a Grazier working on their family property ‘Glen Lee’ at Wallangra. Prior to the War he was a member of the nearby Rocky Dam Rifle Club.
He enlisted first in August 1915 at Liverpool and was rejected as medically unfit. At the age of thirty five, he enlisted in Sydney again in August 1916 and was accepted into the 1st Machine Gun Company, 13th Reinforcements. He left Australia for England on HMAT A29 Suevic in June 1917. He spent several months at Durrington Camp and was appointed Acting Lance Corporal in December 1917. Finally Malcolm was sent to France in July 1918. He returned to Australia in 1919.
Malcolm died in 1961 and was buried at Warialda. His name is recorded on the Wallangra Roll of Honor.