 Jenkins sat as a member of Swansea Borough Council from 1927 to 1954 and served as Mayor of Swansea between 1947 and 1949.In 1928 he was appointed a Justice of the Peace for the County of Glamorgan and was sometime Chairman of the Bench of Magistrates, Gower Petty sessional division.He was a member of the Court of Governors and Council of University College, Swansea.