O'Brien was the 19th Accountant General and Controller of Revenue of British Ceylon. He was appointed on 18 October 1890, succeeding W. H. Ravenscroft, and held the office until 31 July 1891.
O'Brien was the 19th Accountant General and Controller of Revenue of British Ceylon. He succeeded W. H. Ravenscroft on October 18, 1890, and held the position until July 31, 1891.