His work includes music for plays such as The Tragical Life of Cheeseboy, and When the Rain Stops Falling; many works for orchestra that have been played in Germany, Canada, and by the leading Australian orchestras; and soundtracks for films and documentaries broadcast on the ABC and SBS. He also writes for concert performances and film, and plays in many groups: from rock to new music and, most recently wild gypsy music with Golonka.

He is co-director of The Firm, a company that presents concerts each year featuring Australian classical musicians in programmes of new Australian music along side interesting repertoire. In 2013 his first opera, An Ode to Nonsense, was premiered by Slingsby and the State Opera of South Australia.

Quincy lives in Adelaide with four dear ones – Anna, Arland, Clara and Miranda.