He was a right-handed batsman and right-arm medium-fast bowler who played for Glamorgan. Kirnon, who spent his childhood in Montserrat, and later joined the British Army, made a single first-class appearance on the basis of good performances for German cricket club Dortmund. Kirnon made a single first-class appearance for the team, during the 1992 season, against Oxford University.
He did not bat in the match, but bowled 14 overs, taking one wicket.
Kirnon made two List A appearances for the team between 1991 and 1992, scoring a single run.
