He was the minister assisting the president of Nauru in the cabinets of Lagumot Harris in 1978 and 1995–1996.
[3] He was Minister of Finance under Bernard Dowiyogo and Lagumot Harris from January 1978[4] to May 1978, and again in the cabinet of Lagumot Harris from November 1995[5] to November 1996.
Kun was again Minister of Finance under Bernard Dowiyogo from August 1998[6] to December 1998.
Under the Pacific Solution asylum policy, Australia has an arrangement with Nauru that allows asylum seekers arriving in Australia to be detained on the island.
Kun represented detainees in a case before the nation's Supreme Court.