After the First World War, he became a journalist working initially at Hiffe and Temple Press, working on The Motor magazine. He was later promoted to editor of Light Car magazine.[6]
On one assignment, he conducted a press interview with William Morris (later Lord Nuffield), and Morris was so impressed with his 'clarity of thought' that he offered Thomas employment.[7] Soon, Thomas was in de facto charge of sales and purchasing at Morris Motors, where he came up with the idea of producing a magazine for owners and dealers, in order to bring about brand loyalty.[7] To achieve this, Morris created the Morris Oxford Press (later to become the Nuffield Press and placed Thomas in charge. The press produced a wide range of materials for the Nuffield Organization including promotional magazines, brochures, and paperwork.
Thomas' success at the press led to promotion, including being involved in the formation of the Pressed Steel Company subsidiary of Morris, and then becoming General Manager of Wolseley Motors in 1933, taking charge of developing the Wolseley Wasp, Wolseley Hornet and Morris Fourteen, before becoming Managing Director in 1937.[6]
In 1940, he was promoted to Vice-Chairman of Morris Motors, and was instrumental in the Nuffield Organization war contribution, including being Chairman of the Cruiser Tank Production Group, and a member of the Government's Advisory Committee.
Thomas left Morris Motors in 1947 to take up a post as deputy Chairman at the British Overseas Airways Corporation (BOAC),[6] where he introduced the de Havilland Comet, the world's first jet airliner. This made him the public face of BOAC during the high-profile losses of Comet aircraft between 1952 and 1954.
In 1956 he resigned after a row with Harold Watkinson[3] then Minister of Transport and Thomas was elected as chairman of the board of Monsanto Chemical Ltd.[10] The company had just opened a new UK Head Office at Monsanto House (the name signs now covered over), 10-18 Victoria Street, London SW1H 0NB and had acquired a large chemical plant in Cefn Mawr, Thomas' birthplace. HRH Prince Philip opened the building and a plaque still remains on the ground floor on what has been occupied by the Board of Trade partially since the late 1960s and wholly since Monsanto relocated its UK offices to Basingstoke in the late 1970s. He later took other board appointments including Britannia Airways.[3] In 1962 he was invited to deliver the MacMillan Memorial Lecture to the Institution of Engineers and Shipbuilders in Scotland. He chose the subject "Air and Sea Transport-Friends or Foes?".[11]
On 2 June 1924 he married Hylda Church, who had been William Morris's secretary. They had a daughter, Sheila, (1925-2019), and a son, Michael (1926).[3]
^ abSmith, John R (1990). Printing in Oxford - The evolution of the Nuffield Press: The other William Morris printing for the other Oxford. Old Forge Press.