Entering the civil service in 1928, Campbell was to hold posts in the
Inland Revenue and the
Admiralty (1935), before being appointed Principal, Department of Agriculture for Scotland (1938–43), Assistant Secretary (1943–53), Under-Secretary (1953–58), and latterly, the last Secretary of the Department of Agriculture for Scotland (1958–62), becoming in 1962 the first Secretary of the new Department of Agriculture and Fisheries for Scotland, a position he held until his retirement in 1968. From 1951 to 1954 Campbell served as Secretary of the Taylor Committee, on which recommendation the Crofters' Commission for Scotland was established and Campbell was to be highly instrumental in taking forward the recommendations and work of the Crofters' Commission. == Marriage, awards and honours ==