Biljana has represented Australia in 12 Women's Chess Olympiads in 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2008, 2010,2012,2014 and 2016. Her best results were in the 30th Chess Olympiad in Manila 1992 where she scored 8/14 on board one, and the 40th Chess Olympiad in Istanbul 2012 where she scored 6/9 on the reserve board. She was the equal top scorer in the Australian Women's team on both occasions.
