He undertook a journalism cadetship at The Cairns Post, and subsequently moved to Melbourne to work for the Sunday Herald Sun.
He performed in theatre, numerous television commercials, as well as guest roles in Neighbours, Blue Heelers and Sea Change.
More recently, he has created the successful Agony series for ABC1, featuring some of Australia's funniest and brightest comedians and social commentators.
[6] From 2006 to 2010, he was head writer on the AFI Awards screened on the Nine Network, working alongside hosts Geoffrey Rush and Stephen Curry.
Zwar's other screen-acting credits include both seasons of the Network Ten sketch comedy series The Wedge, Blue Heelers, Stingers, CrashBurn, SeaChange, BackBerner, Foxtel's drama Tangle and MDA.
His stage-acting credits include Kissing for Australia, for which he received a Green Room Award nomination, and Cyrano de Bergerac for the Melbourne Theatre Company.