GEOFFREY KO is a New York based music director, arranger, and orchestrator who primarily works in new musical theater. Recently, he was the music director of The Notebook on Broadway. BROADWAYThe Notebook, Be More ChillOFF-BROADWAYBroadway Bounty HunterBabyBilly and the Killers, Generation Me, RenascenceSELECT REGIONAL: Jersey Boys (Paper Mill), Hair (Two River), The Notebook (Chicago Shakespeare Theater), Disney’s A Jolly Holiday (Paper Mill), Row (Williamstown), Mystic Pizza (Ogunquit), May We All (Tennessee Performing Arts Center), Punk Rock Girl (The Argyle Theatre), Other World (Bucks County Playhouse), Love in Hate Nation (Two River), The Honeymooners (Paper Mill), and October Sky (Marriott Theater). ORCHESTRATIONS: Baby (MTI/New Off-Broadway Cast Recording), The Museum of Broken Relationships (Daniel Green), The Morris & Essex Line (Salzman and Cunningham), Sweet Charity (Marriott Theater), Explora Cruises, and The American Pops Orchestra. OTHER WORKRatatouille: The TikTok MusicalThe Remarkable Journey to TianguoWilliamsburg, Born Country, American Songbook (Lincoln Center), and concerts for Disney on Broadway.

As an Orchestrator and Arranger, he has orchestrated new musicals such as The Morris & Essex Line by Josh Salzman and Ryan Cunningham and The Museum of Broken Relationships by Daniel Green and David Bell. He has several projects in development including Always Something There (as an Arranger/Orchestrator), a new musical by Sandy Rustin premiering at The Marriott Theatre Summer 2025, and Take The Lead (as an MD and co-arranger/co-orchestrator with Bill Sherman) premiering at Paper Mill Playhouse Spring 2025. He has also orchestrated experiences for cruise lines such as Explora Journeys, arranged medleys for 100+ performers for The Jimmy Awards, orchestrated reductions for theaters such as The Marriott Theatre, and done new orchestrations for classics such as Baby (with a new book by Richard Maltby, Jr.).

Originally from Westfield, NJ, Geoff studied at Northwestern University. He frequently works with students and emerging artists through programs such as The Jimmy Awards and various programs around New Jersey and New York City.