In addition to her teaching, Josie has had her composed work performed by Sydney Chamber Choir, Leichhardt Espresso Chorus, The Song Company, Sydney Youth Orchestras, Moorambilla Voices, and Gondwana Choirs. In 2016, she completed her Honours in Composition at the Sydney Conservatorium of Music, under the tutelage of Paul Stanhope. June 2019 saw the world premiere of Pánta Kremámena, an extensive work for choir and chamber orchestra performed by Leichhardt Espresso Chorus at St James King St. She has been composer in residence with Moorambilla Voices since 2016, which has involved four works premiered at the annual Moorambilla Festival; the performance of her work Guya at the 2018 TEDxSydney conference; and the inclusion of her music on three albums, most notably the eponymous track from Yindyamarra (2017); and a composer in residence with the Flame Tree Project, a new Illawarra-based children’s choir, since 2019. As a music director, she has worked for a wide variety of theatre productions, comedy revues, and ensembles, including the Sydney University Dramatic Society’s 125th Anniversary production of Agamemnon (2015), and independent theatre productions with Smoking Gum Theatre and Montague Basement.

As a chorister, she has toured internationally with Gondwana Chorale, appeared as a guest artist with Luminescence Chamber Singers, The Song Company, and Cantillation, and performs regularly with Sydney Chamber Choir.