Career
He shares the Oceanian and Australian record for the event at 38.17 seconds. His international debut came at the 1990 World Junior Championships in Athletics, where he was chosen to run in all three short sprint events. He placed seventh over 200 m, but failed to make the final in either the 100 m or the 4×100 metres relay.
A runner-up finish over 200 m at the Australian Athletics Championships in 1993 brought him selection for the 1993 World Championships in Athletics.
On his senior debut for Australia he helped the national relay team to fifth place with a time of 38.69 seconds. Henderson formed part of the relay quartet for the 1995 World Championships in Athletics alongside Tim Jackson, Steve Brimacombe and Damien Marsh.
Running the lead-off leg, the team set an Oceanian record time of 38.28 seconds in the heats to progress to the next round as the fastest team The team was slightly slower in the final race, but were a clear second place behind Canada – the team"s silver was Australia"s first ever World Championships relay medal.
The Australian women"s 4×400 metres relay followed this with a second relay medal one hour later.
His final major international appearance was at the 1996 Atlanta Olympics. He did not repeat the success of the World Championships and was eliminated in the first round of the individual 100 m before being disqualified in the men"s relay event. He set his personal best for the 100 m of 10.27 seconds that same year.
60 metres – 6.77 (1999)
100 metres – 10.27 (1996)
200 metres – 20.63 (1993).