Early in the war, Wilson was briefly appointed Acting Medical Director of the Tavistock Clinic. This was only a short appointment, because in 1941 Wilson joined the
Royal Army Medical Corps. His first project involved a study of morale with
Thomas Main, and at this time he also studied the sociological and disciplinary structure of the forces and the work of
Moreno and
Lewin. Wilson also worked with Brigadier Francis Crew at the Directorate of Biological Research, conducting statistical and epidemiological research for the military. Like almost all of the Tavistock staff, Wilson was involved in creating new methods of selecting personnel for the
British Army, helping to develop a scheme of
War Office Selection Boards. Following on from this work, Wilson then became a member of the committee on the recruitment and selection of the administrative class of the
Civil Service. In July, the King and Queen visited the unit, resulting in significant media coverage for the programme and Wilson's military colleague Colonel Dick Rendel. ==Post-war work==