He served in the Wakefield Battery of the Royal Garrison Artillery during World War One, service which left him with lifelong hearing damage.
These works quickly led to Pitchforth being given a salaried position with WAAC in 1940, in which he painted further scenes of bombed buildings, war-time factory production, air raid precaution training exercises, parachutes being packed and RAF operations rooms.
He travelled extensively to complete this commission, working in London, Birmingham, Bristol, Manchester,[7] the south coast of England, Scotland, Northern Ireland, as well as sailing on convoys to Gibraltar and the Azores.
[9] At the end of the war Pitchforth developed a lung infection and spent some considerable time convalescing in South Africa before returning to Britain in 1948.
[3] After he returned to Britain Pitchforth resumed a teaching career, holding posts at Chelsea Polytechnic, Camberwell and St. Martins until he retired from the Sir John Cass College of Art in 1974.