After working as an actor and director predominately in theatre, Lynn was accepted into Swinburne School of Film and Television and graduated in 1988. Her final-year film The Seannachie was nominated for Best Short Fiction at the AFI Awards and the ATOM awards that year. Moving to Sydney, she wrote, produced and directed the one-hour comedy/drama How Wonderful, which won the Human Rights Award for Best TV Drama in 1990. It was also nominated for an AFI Award (Best Actress) and the American Cable Awards (Best International Dramatic Special). The film was successfully sold internationally.
Lynn wrote and directed a series of short films for Film Australia that won numerous awards between them for Best Film, Best Director and Best Script at the International Television and Video Awards. She also directed a number of documentaries including the series Australian Odyssey, a BBC/SBS co-production. Since then Lynn has been predominantly directing television drama, including the award-winning series Police Rescue produced by Southern Star Xanadu for the ABC, Heartbreak High produced by Gannon Television for the ABC/BBC, Wildside for the ABC, the Halifax FP telemovies, Twisted Tales, Stingers and Water Rats for the Nine Network followed by White Collar Blue for Channel Ten.
In recent times she has directed All Saints and numerous episodes over 6 seasons of the highly successful comedy/drama Packed to the Rafters for the Seven Network and Me and My Monstersfor the BBC and Channel 10. Also Crownies for the ABC and Tricky Business for the Nine Network both with Screentime Productions. Her recent writing includes the feature screenplay Life, Sex, Death with Sarah Walker and she also co-developed the TV series Winners and Losers with Bevan Lee and Sarah Walker for the Seven Network. In 2012 and 2013 Lynn Hegarty directed Series 1 and 2 of A Place To Call Home for the Seven Network and is set to direct Rebecca Gibney’s new mini-series The Killing Fields.