Sumirat was one of
Indonesia's leading singles players during the 1970s, when it dominated men's international competition while
China was still absent from
IBF-sanctioned play. As fellow countryman
Rudy Hartono was winning his eighth
All-England Championship in March 1976, the hard-smashing Sumirat was winning the Asian Invitation Tournament in
Bangkok, Thailand, edging aging Chinese badminton legend
Hou Jiachang in the final. In the first
IBF World Championships in
1977 Sumirat reached the semi-final round but was defeated by the eventual winner
Flemming Delfs. Sumirat played on the world champion
Indonesian Thomas Cup (men's international) teams of
1976 and
1979, splitting duty at second singles behind Hartono in 1976, and playing second singles behind
Liem Swie King on a 1979 team which shut out its semi-final and final round opponents. He coached after his high-level playing career ended. He helped
Taufik Hidayat, in particular, learn his deceptive net play. Sumirat died on 22 July 2025, at the age of 74. ==Achievements==