Bishop's first job was for a Quaker organisation in South Wales which assisted the unemployed through subsistence production. On the outbreak of the second world war he moved to the
Ministry of Food as a statistician, subsequently running its Emergency Services division. After the war Bishop became a private secretary to ministers of food
Ben Smith and
John Strachey. Bishop was active in winding up the disastrous
groundnut oil scheme. In 1959 he was promoted to Deputy Secretary, then the youngest such appointment ever. In 1961 Bishop moved to the then sugar company
Booker McConnell, becoming vice-chairman in 1970 and chairman in 1972. He was knighted in 1975 and retired in 1979. ==Exploration==