 Starting off as a Junior Unionist, Brian McConnell attended the Conservative Conference in Brighton as an Ulster Unionist delegate in 1947, at which he made a warmly received address on one of the resolutions before the conference of over 3,500.He was first elected to Stormont at the 1953 Northern Ireland general election.In 1962 Lord Brookeborough appointed him Parliamentary Secretary to the Ministry of Finance (Government Chief Whip), and after holding a junior office at the relatively new Ministry of Health, he became Minister of Home Affairs in 1964 in the government of Terence O'Neill.