In 1904 he transferred to the Indian Army and accompanied Sir Louis Dane on his mission to Kabul, Afghanistan, 1904–1905.
He was posted to British East Africa, where he was appointed Inspector General of Communications.
[1] He then led the British Military Mission to Turkestan between 16 July 1918 – 5 April 1919, aiming to block possible German-Turkish thrusts towards India and Afghanistan.
[3] He led the Malleson Mission an effort to curtail German and Turkish influence in the area, and to assist the Transcaspian Government against the Bolsheviks in the Russian Civil War.
He was involved in military intelligence, running a spy network from Meshed in north-eastern Iran against the Russians during this period.