Mackie moved to Alberta with his family to the Lacombe area in 1902.
[4] Mackie was elected in the 1944 Alberta general election to the 10th Alberta Legislature for the constituency of Stettler as a member of the Social Credit Party.
Mackie received 60.1 per cent of the vote, defeating Co-operative Commonwealth candidate Arthur H. Rowe and Independent Cornelius F.
[5][6] Mackie was re-elected in the 1948 Alberta general election, receiving 77.3 per cent of the vote, defeating Co-operative Commonwealth candidate Joe J.
[7][6] Mackie moved to Calgary in 1957, and died at the age of 82 in April 1961.