Kris was appointed Deputy Minister of Education by Field Marshal Thanom Kittikachorn in his 1969 government. On 23 November 1970, he was switched to Deputy Minister of Defence (Thanom was both premier and minister of defence). The government fell on 17 November 1971 after Thanom led a coup that overthrew his own government and abrogated the 1968 constitution. Thanom appointed Kris Minister of Industry in his subsequent junta.
