Martin Koch received his musical training at The Royal College of Music. He was the musical director for a number of shows including Chicago (Cambridge Theatre), Cats (New London Theatre), The Pirates of Penzance (Theatre Royal, Drury Lane), Blondel (Aldwych Theatre), The Boy Friend (Shaftesbury Theatre), and Follies (Shaftesbury Theatre).
In addition he was the musical supervisor for Mamma Mia! (Prince Edward Theatre in London and also in Toronto and New York City), Into the Woods (Phoenix Theatre), Les Misérables (Barbican Theatre, Palace Theatre, also Oslo, Vienna, Gedansk, Amsterdam, Asian/South Africa tour and Australian tour), Les Misérables - 10th Anniversary Concert (Royal Albert Hall), Miss Saigon (Theatre Royal, Drury Lane, also Holland, Australia and also pre-planned the production in Germany and Japan), Just So (Tricycle Theatre), Moby Dick (Piccadilly Theatre), Which Witch (Piccadilly Theatre), Martin Guerre (UK tour).
Mr. Koch has recorded more than nineteen albums, including five gold and two platinum: the original cast albums of Les Misérables, Miss Saigon, Oliver!, Les Misérables Symphonic, Hey Mr. Producer! CD.
He has orchestrated Mamma Mia! (Prince Edward Theatre), Just So, Moby Dick, Tutankhamun, Which Witch and arrangements for many international artists and orchestras.
His television credits include composer of The Olivier Awards (1993, 1994, 1995 & 1999), BAFTA (1995, 1997 & 1999), Auntie's Greatest Hits, a program to celebrate 50 years of BBC Television, Winton Wonderland and the 1998 Eurovision Song Contest where he wrote the opening title and devised and wrote the interval act.