Born in Winnipeg, Manitoba, he received a Bachelor of Arts in political science in 1959 and a Master of Arts in 1971 from the University of Manitoba. From 1962 to 1995, he was professor of Political Studies at the University of Manitoba.
He joined the Canadian Naval Reserves in 1954 as a Cadet at HMCS Chippawa. From 1987 to 1990, he was Chief of Reserves and Cadets for the Canadian Forces. He retired in 1996 with the rank of Rear Admiral, Reserve.
In 1989 Fox-Decent chaired the Manitoba Task Force on the Meech Lake Accord. The committee, struck by Premier Gary Filmon and made up of Members of the Legislative Assembly from all three parties, accepted briefs and heard testimony regarding Manitobans' thoughts on the Accord, a constitutional amendment package debated from 1987-1990.1
From 1992 to 2005, he was Chairman of the Workers Compensation Board of Manitoba.