In December 1882 with the help of his uncle Joseph Benjamin Brain, he purchased the long-established Old Brewery, St Mary Street, from his brother-in-law, John G.
[2] Prior to his heavy involvement in business, Brain was a member of the Glamorgan Artillery Volunteers, becoming a sergeant.
[2] Brain was persuaded to stand for elected office in 1885 and became a Conservative councillor on Cardiff Town Council for the Canton ward.
[2] Brain died on 19 February 1903 aged 52, at his home on Plymouth Road, Penarth.
An estimated 15,000 people lined the streets of Penarth, with a funeral procession including representatives of Cardiff Council, Penarth District Council, Cardiff Conservative Association, Cardiff Licensed Victuallers Association, the Glamorgan County Police (on horse and on foot), the Glamorgan Imperial Yeomanry, 300 of the Glamorgan Volunteer Artillery and a Royal Field Artillery gun carriage.