Geoffrey Castles is a leading Musical Director, Conductor, Pianist and Vocal Coach in Australia. Geoffrey holds a Bachelor of Music from the Sydney Conservatorium of Music, an AMusA in piano from the AMEB and was awarded the 2002 Young Citizen of the Year for Willoughby City Council.
Geoffrey’s credits as Musical Director/Conductor include the Australiasian tour of Miss Saigon (CML/GWB), the 2022/2023 Australian tour of Mary Poppins (MCG/CML), the Australian premiere of The Bridges of Madison County (Neil Gooding Productions/Matthew Management/Hayes Theatre), Aspects Of Love (Hayes Theatre/Walk This Way Productions), On The Town (VCA), Little Women (Federation University), Disney’s Aladdin (Disney Theatrical Australia), the 25th Anniversary production of Les Misérables (CML/MCG), the Auckland season of Mary Poppins (Disney/CML), Songs For A New World (Blue Saint Productions/Chapel Off Chapel), Diamonds Are For Trevor (Trevor Ashley/Arts Centre Melbourne/MidSumma), and Hello Again (Gaiety/Darlinghurst Theatre). As Associate/Assistant Musical Director for Sweeney Todd (Life Like Co.), Wicked (GFO/Universal), Dirty Rotten Scoundrels (James Anthony Productions), Mary Poppins (Disney/CML), Disney’s High School Musical (Jacobsen/RUG) and Guys And Dolls (Donmar Warehouse/Ambassador). Geoffrey has been a guest conductor with the Darwin Symphony Orchestra and the Canberra Symphony Orchestra and was the Associate Musical Supervisor for the 2021 Korean language production of Wicked (S&Co). In 2026 Geoffrey will be joining the Les Misérables Arena Spectacular World Tour in Manila as the Associate Musical Director before returning to Australia as Musical Director for Waitress (Crossroads Live).
He has musically directed and arranged for numerous corporate events and concerts and given his time to charity events including Light The Night, Twisted Broadway, Hats Off, World AIDS Day and The Rob Guest Endowment. Geoffrey has also written arrangements for events including Carols By Candlelight and The Helpmann Awards and he has collaborated with artists including Andréa Burns, Joshua Henry, Hayden Tee, Marika Aubrey, Simon Gleeson, Toni Lamond, Avigail Herman, Rob Mills, Trevor Ashley, Lucy Durack, David Harris, Virginia Gay and David Campbell. Geoffrey was the Musical Director for The Sydney Cabaret Showcase in 2005, 2007 and 2009.
As a pianist he has played on productions including Tina: The Tina Turner Musical (TEG Dainty), Frozen (Disney), Ragtime (The Production Company), Charlie And The Chocolate Factory (GFO), Muriel’s Wedding (Sydney Theatre Company/Global Creatures), A Chorus Line (TML Enterprises), Into The Woods (ANZ/Rob Guest Endowment), Mamma Mia (Louise Withers), Pippin (Kookaburra), Spring Awakening (Sydney Theatre Company), Priscilla Queen Of The Desert – The Musical (GFO/Back Row Productions) and Altar Boyz (Ovations Live).
When not away on tour Geoffrey runs a busy private studio preparing artists for auditions and performances. He specialises in repertoire, audition books and the unique vocal styles and sounds found in musical theatre. He is currently studying for a Master of Fine Arts (Music Theatre) by research through the University of Melbourne. Geoffrey’s interest is in the influence of CCM styles of singing on musical theatre voice types and categorisations and his master’s thesis will focus on traditional and contemporary soprano singing in musical theatre.