[citation needed] Frederiksen played minor parts in the television shows Young Lions (2000), Blue Heelers (2002) and Mermaids (2003).
He secured his first major television role as part of the cast of Australian series Stingers in its seventh season, playing Leo Flynn.
Frederiksen portrayed Mark Antony in Bell Shakespeare's production of Julius Caesar (2011), touring around Australia and closing at the Sydney Opera House.
Just some of these include playing the title role in Brendan Cowell's Ruben Guthrie (2011), Fatboy (2010), Leaves of Glass (2009), The Pain and the Itch (2008)[9] and After Miss Julie (2007).
In 2013 he performed the role of Giles in Travis Cotton's play Robots vs Art[11] and Neil Labute's Fat Pig.