His Thomas Cup (men"s international team) record is particularly noteworthy. He captured the men"s doubles title at the 1965 Asian Badminton Championships with Narong Bhornchima. Touring internationally in 1968 he shared the Dutch Open and the Canadian Open men"s doubles titles, and reached the All-England men"s doubles semifinal, with Sangob Rattanusorn.
At a time when Thailand was known for its doubles specialists, Chumkum won more Thai national men"s doubles titles than any other player of his era. Participating in the "60-"61, "63-"64, and "69-"70 campaigns (Thailand declined to compete in "66-"67), Chumkum won 19 of the 23 doubles matches that he contested in ties (team matches) against Indonesia, Denmark, Malaysia, Japan, and India among other nations.
