Jack Chalmers Mackenzie, engineer and science administrator, was born in 1888 at St. Stephen, N.B., obtained a Bachelor of Engineering degree from Dalhousie University in 1909 and a Master of Civil Engineering from Harvard in 1915. After working briefly as a consulting engineer in Alberta, Mackenzie went overseas in 1916 with the 54th Battalion CEF. Returning in 1918, he became a professor of Civil Engineering at the University of Saskatchewan in Saskatoon, a position which he held until 1939, and was also the Dean of the College of Engineering there from 1921 to 1944. He was also active in Saskatoon municipal politics. "Dean" Mackenzie is best known for his involvement in the evolution of a Canadian science policy and the development of atomic energy. From 1935 to 1964, he was a member of the Advisory Council of the National Research Council of Canada. He was appointed Acting President of the NRC in October 1939, and became President in October 1944. During these years much of the NRC's resources were devoted to war and military research. He served as President of the Atomic Energy Control Board from 1948 to 1961. Mackenzie resigned from the NRC in 1952 to become President of the newly formed crown corporation, Atomic Energy of Canada Limited, a position he held until 1953. In this capacity, he oversaw the early years of the atomic energy project at Chalk River, Ontario. He resigned from AECL September 1953. Mackenzie retired from public service in 1964, but continued to pursue part-time careers as Chancellor of Carleton University and Director of Chemcell Limited and Columbia Cellulose Limited. Dean Mackenzie died in Ottawa on 26 February 1984.

Herbert Herridge, MP. Born in England in 1895, Herbert Herridge and his family emigrated to Canada in 1906 and settled in Nakusp, British Columbia. From 1909 to 1914, he attended the Ontario Agricultural College and in 1915 enlisted in the 54th (Kootenay) Battalion. Severely wounded at the Battle of the Somme, he returned to Canada in 1918 when he took over his parents' property for the purpose of farming and helped organize the Great War Veterans' Association. Vice-President of the British Columbia Liberal Association in 1932 and Acting President in 1933, Herridge joined the Co-operative Commonwealth Federation in 1934. Elected in 1941 as a Member of the Legislative Assembly for Rossland-Trail, he resigned his seat in 1945 in order to run in the federal general elections. As this action was taken in violation of a directive of the British Columbia Council of the C.C.F., he was expelled from the Party and became a candidate for the People's C.C.F. Elected as a Member of Parliament for Kootenay West, he was re-admitted to the C.C.F. in 1948 and was re-elected M.P. in the general elections of 1949, 1953, 1957, 1958, 1962, 1963 and 1965. He served briefly as Parliamentary Leader of the New Democratic Party in 1962. As a M.P., Herridge served on the Standing Committee on Veterans Affairs, 1945-1968, and was also on the Standing Committee on External Affairs and on the Standing Committee on Agriculture, Forestry and Rural Development. Both inside and outside of Parliament, he was a determined opponent of the Columbia River Treaty. Among his numerous extra-Parliamentary affiliations, he was a life member of the Royal Canadian Legion, an honourary life member of the International Union of Mine, Mill and Smelter Workers and served on the executive of the Canadian Tree Farmers' Association.