[2] Fennessy's career began in Melbourne in the 1990s, involving his talents as writer, director and actor.
[2] He acted in a number of television series, including Neighbours, Introducing Gary Petty, Blue Heelers and City Homicide.
[2] His play, National Interest (2012), was commissioned by the MTC and the Black Swan State Theatre Company (Western Australia) on the theme of the Balibo Five.
The play incorporates media coverage, speeches, court transcripts, and other factual material, into the "deeply personal story".
[6] He died from cancer during one of the lockdowns in Melbourne arising from the COVID-19 pandemic in Australia.