He was the elder brother of the former Member of Parliament for Gua Musang, Tengku Razaleigh Hamzah.

The first time was when his father-in-law, Sultan Yahya Petra was visiting Japan, Taiwan and Hong Kong, where he became Regent for two months, starting from 18 April 1966 until 3 July 1966.

[3] When his father-in-law underwent surgery at the General Hospital in Kuala Lumpur, Tengku Abdul Aziz served again as the Regent for two months from 13 December 1967 to 4 February 1968.

[5][6] Tengku Abdul Aziz was the President of the Kelantan Islamic Religious and Malay Customs Council (MAIK) from 1 January 1967 to 31 May 1975.

[8] Tengku Abdul Aziz died at Gleneagles Hospital Kuala Lumpur at 2:37 am on 20 September 2020.