Moore was born in
Leeds, West Yorkshire, England. He emigrated to Canada in 1909 at the age of 31 and settled in
Niagara Falls, Ontario. He was active in the
United Brotherhood of Carpenters and Joiners of America at both the local and regional level, including working as an organizer for Eastern Canada from 1911 to 1918. In 1919, he served on the
Royal Commission on Industrial Relations (Mathers Commission). In 1920, Moore was elected president of the
American Federation of Labor-affiliated
Trades and Labor Congress of Canada, a position he held until 1935. In 1938, he was re-elected to the position, which he held until 1943. He opposed radical unionism, including the
One Big Union movement. He was later a delegate to the
International Labour Organization. ==References==