[1] Mackintosh served in the First World War with the Canadian Expeditionary Force 113th Battalion.
He was defeated by Social Credit candidate Wilson Cain finishing a distant fourth place in the four way race.
[4] In 1940, Mackintosh moved to Bowness, and bought 24 acres of land west of the Shouldice Bridge in the area then known as Critchley.
He relocated his business, Western Nurseries, from Brooks to Bowness but had difficulty at first because of the lack of water, electricity or gas.
As mayor, Mackintosh lobbied the provincial government for a catchbasin to prevent flooding (there was a bad flood in Bowness on New Year's Eve 1951), and for a school, which was named Bowcroft School.