Tiedemann had previously represented Canada at the U-17, U-19, and U-20 levels before making his debut with the senior men's squad. At the 2008 IRB Junior World Championship Tiedemann started in four of the five matches in which he played including the team's sole victory of the tournament, a 17–10 win over Fiji.
It was announced on 26 September 2012 that Tiedemann would be joining FC Auch Gers for the remainder of the 2012-2013 ProD2 season as medical cover.[2]