Brieley has been working collaboratively and as a piano accompanist for over 30 years. An influential initial experience in this field was performing Faure's Violin & Piano Sonata No.1 with a fellow undergraduate student for Yehudi Menuhin when she was a 13 year old student at the Queensland Conservatorium. She went on to win collaborative awards including the Basil Jones Sonata Prize (for piano with a strings instrument) and Margaret Nixon Prize (art song) at the Queensland Conservatorium, and was later invited back to help adjudicate for the Margaret Nixon prize. Brieley has since collaborated with leading professionals - such as Alexander Baillie (cello) and Michael Cox (flute) - and with leading ensembles - such as Ensemble Trivium, Australia Piano Quartet, Collusion, Topology and the Queensland Symphony Orchestra Chamber Players.
Brieley's organisation DeClassified Music followed her enthusiasm for collaborative music making and started as a professional chamber music concert series in Brisbane. With the support of the Steinway & Sons piano distributors in Brisbane, the project commenced initially as the Commercial Road Chamber Music Series in 2011, the series being renamed DeClassified Music in 2013. Known for its bold imagery, free programming, innovative use of colourful venues and support for leading Australian musicians, Brieley's DeClassified Music events featured in two Queensland Music Festivals, were awarded a Creative Sparks Award from the Brisbane City Council, had support from Arts Queensland and the Australia Council of the Arts, and the performances attracted high praise from reviewers such as The Jazz Mann and RealTime Arts Magazine.
Brieley's doctoral studies were completed in 2016 (Griffith University) with her dissertation entitled The Chamber Music Pianist: An exploration of the skills required by pianists working in small ensembles. Following her submission, Brieley wrote an opinion piece which was published in 2018 for Limelight Magazine entitled The Power Behind the Throne where she shared her viewpoint that the concert pianists' musical part and role in collaborative work should be proactive and vital, not just supportive, "In a duo situation, the pianist is invariably considered subservient, an accompanist supporting a soloist. Brieley Cutting begs to differ, suggesting that it could just be the other way around."​​​
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Brieley's most recent projects have included DeClassified Music projects and professional recitals with musicians such as Christopher Pidcock (cello), Kristian Winther (violin), Jessica Lee (flute) and David Silva (flute); AMusA violin exams; assisting vocalists in the Sydney Eisteddfod open sections; and performing with Sydney Conservatorium tertiary students for recitals and examinations.
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Brieley is a member of the Accompanists' Guild of NSW.