In November, 1928, Jellicoe was elected to a seat on the Board of Directors of the Midland Bank. In early 1930 he was appointed to the London Board of the Australian Mutual Provident Society in the place of the late Sir George A. Cockburn.
- "Lord Jellicoe's Bank Directorship" (Business Appointments). The Times. Friday, 23 November, 1928. Issue 45058, col C, pg. 24.
- The Economist. Saturday, 1 February, 1930. Issue 4510, pg. 278.