Bunyapana 16 June 1992 - 7 July 1993 Aran Tammano 20 July 1993 - 30 September 1995 M.R. Chatu Monkol Sonakul 1 October 1995 - 28 July 1997 Supachai Pisitvanich (acting) 29 July 1997 - 4 August 1997