Remaining in the army after the war, Beauman served at the Staff College, Camberley, initially as a student and then as a General Staff Officer (GSO) in India, as Chief Instructor at the Royal Military Academy Woolwich, and commanded the 1st Battalion, York and Lancaster Regiment. Following a spell as the Chief Instructor in the Small Arms School Corps at Netheravon, he took command of the 15th Infantry Brigade which was deployed to suppress the 1936–1939 Arab revolt in Palestine; Beauman was made a Commander of the Order of the British Empire for his services there in 1937. In 1938, Beauman became an aide-de-camp (ADC) to King George VI and following his retirement in October of that year, was made an Honorary brigadier-general.