Gus Drennan is a London-based orchestrator and arranger working across musical theatre, live concerts and recording projects. A former award-winning chamber musician, he specialises in rhythm-driven orchestration and inventive scoring for modern theatre ensembles, often combining traditional orchestration with music technology.

His work spans West End productions, international tours, workshops and studio recordings, collaborating closely with composers and music directors from early development through to performance. Recent credits include Karate Kid (UK & Canada Tour), SVN (China Tour), Bazaar (Celebrity Cruises), Hello, Dolly! (London Palladium, associate) and Bonnie & Clyde (Garrick Theatre, associate).