Quincy lives as a freelance composer on commissions from musicians around Australia and internationally. He has written and performed a lot of music for the theatre, working with companies such as Slingsby, Circa, Brink Productions, Queensland Theatre, and State Theatre SA. 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, sweet light classical tunes with The Horizon Quartet, and rollicking sea-song rock with Mumpsimus. He is co-director of The Firm, a company that presents concerts each year featuring Australian classical musicians in programs of new Australian music along-side interesting repertoire. In 2020 he is writing a new opera, When the Rain Stops Falling, with Andrew Bovell, co-creating a new Slingsby production for the 2021 Adelaide Festival, and composing a music theatre work with writer Kathryn Marquet for Little Match Productions, Brisbane.