 Off the field, Trumble worked for the National Bank of Australasia, rising to the position of manager of a local branch despite his cricket commitments interrupting his banking career. In 1911, he was appointed secretary of the Melbourne Cricket Club, overseeing the development of the Melbourne Cricket Ground (MCG) into a stadium capable of holding over 70,000 spectators. He held this post until his death in 1938 from a heart attack, aged 71.
