[4] In 2001, Harris moved to Canberra to attend the Australian Institute of Sport (AIS) and play for the program's SEABL team.

[4] With Lake Ginninderra College[5] at the 2001 National Schools Basketball Tournament in Ballarat, the 17-year-old Harris stood at 219 cm—4 cm taller than the previous student record.

[7] Between 2004 and 2008, Harris played college basketball for Old Dominion University in the United States.

[9][10] However, the team withdrew from the NBL in late July 2008 to pursue competitions closer to home.

[17] For the 2009 SEABL season, Harris returned to the NW Tasmania Thunder,[12] where he averaged 18 points and 11 rebounds while finishing with 73 blocked shots.

[5] In 2003, he helped Australia win gold at the FIBA Under-19 World Championship in Greece.