Kirmayr was a professional tennis player in the 1970s. His first doubles title on the ATP World Tour, he won in 1976 when he won the Tournament of Buenos Aires, Florence and Madrid with changing partners. Overall, he was able to win ten doubles titles, four of them on the side of Cássio Motta during his career. A further 14 times he reached a doubles final, seven times with Motta. Between 1976 and 1982, he was five times in a single final, but could not win a title. Its highest listing in the tennis world ranking he reached in 1981 with position 36 in the singles and in 1983 with six position in the doubles.
His best individual result at a Grand Slam tournament was reaching the second round at the French Open in 1981. 's Doubles competition he came again before the quarter-finals of the French Open. He also reached the second round of Wimbledon in 1986 and the second round of the U.S. Open in double 1974.
Kirmayr played 1971-1986 with 32 singles and 24 doubles matches for the Brazilian Davis Cup team. His single balance was 17-15, 17-7 in a double.
After the end of his professional career was Kirmayr 1983-1987 Member of the Board of Directors of ATP.