From 1919 to 1943, he was Principal of Westcott House, Cambridge, a Church of England theological college.
Cunningham worked with the Cambridge University Mission to Delhi and also as a lay minister in the Diocese of Lahore.
He then served his curacy at St Anne's Church, Wandsworth in the Diocese of Southwark.
[5] On 21 March 1919, he relinquished his commission and was appointed an honorary Chaplain to the Forces 3rd Class (equivalent to major).
[1][2] His funeral was held on 13 September 1944 at the Church of St John the Evangelist, Edinburgh.