Below are links that may be of interest for you.
Ensembles in Queensland
Brisbane Concert Orchestra
Brisbane Philharmonic Orchestra
Brisbane Regional Youth Orchestra
Brisbane Symphony Orchestra
Camerta
Cleveland Symphony Orchestra
Cooloola Community Orchestra
Deep Blue Orchestra
Four Play
Gold Coast Philharmonic Orchestra
Gold Coast Youth Orchestra
The Griffith Trio
Indooroopilly Chamber Orchestra
North Queensland Ensembles Inc
Topology
Queensland Philanthropic Orchestra
Queensland Symphony Orchestra
Queensland Youth Orchestras
Redcliffe City Orchestra
Seaside Symphony Orchestra
St Lucia Orchestra
Sunshine Coast Symphony Orchestra
Sunshine Coast Youth Orchestra
The Westside Orchestra
Western Suburbs String Orchestra
Small Ensembles
National Ensembles
Australian Chamber Orchestra
Australian Brandenburg Orchestra
Australian String Quartet
Australian Youth Orchestra