1939-1945 - employed in the Engine Research Department of the Bristol Aeroplane Company;mfor two years he was personal assistant to Sir Roy Fedden, the Chief Engineer;

1945 - joined the family rubber company, George Spencer Moulton and Co.; became technical director and established a research department specialising in rubber suspension systems for vehicles; designed the rubber suspension for the Mini

In the late 1950s the family business was sold to the Avon Rubber Co. and Dr. Moulton founded Moulton Developments Limited to concentrate on creative design and suspension systems for vehicles

1945 - about 1962 - invented a new type of bicycle