The 2012 World Cup champion won the open men’s 10km event for the third consecutive year, posting a time of 1hr 59min 39.76sec.
He then finished second in the 5km event with a time of 56min 49.81sec, just 0.85sec behind the winner, Jared Poort.
Also winning silver was Hillarys’ Grace Hull in the girls’ 14-years 5km event, posting a time of 1hr 4min 30.84sec after finishing fourth in the 10km event the day before.
Greenwood siblings Thurston and Louise Hewitt also competed, Thurston coming 15th in the boys’ 16-years 5km event and Louise 13th in the girls’ 14-years 5km event.
Other local competitors included Ocean Reef’s Lewis Downes, who came 23rd in the boys’ 13-years 5km event, and Mullaloo’s Ben Jones and Nicholas De Bomford who came 28th and 29th in the boys’ 15-years 5km event.
The championships were held at Lake Macquarie in New South Wales.