In 1902, having attended the local Catholic school, he enlisted in the 5th Battalion, Australian Commonwealth Horse, to fight in the Boer War.

Collins had always been interested in politics and had contested the federal seat of Newcastle in 1913, being a close associate of Charles Hardy, leader of the Riverina Movement.

Collins was embroiled in the United Australia Party-Country Party leadership conflict which ensued after the death of Prime Minister Joseph Lyons in 1939.

Collins, Fadden, Corser and Badman were not permitted to vote in the subsequent leadership ballot, in which Page supporter Archie Cameron became leader.

Known for his charity, skill and support of many sports, Collins considered standing again for parliament, but died on 15 April 1945 of a sudden coronary sclerosis.