Martyn trained in Technical Theatre and Stage Management at the Royal Academy of Dramatic Arts.

Production Management credits include: Head Case, The Shit (Matthew Schmolle Productions, Bush Theatre); West Side Story (Tarento Productions, Krizanke, Slovenia); Charlie and Stan (Told by an Idiot and David Pugh Ltd, UK Tour); Through the Mill (London Theatre Workshop, Southwark Playhouse).

Stage Management credits include: The Book of Mormon (Sonia Friedman Productions, Prince of Wales Theatre); Magic Mike Live (Crossroads Live, Hippodrome Casino); The Band (David Pugh Ltd, UK Tour); The Girls (David Pugh Ltd, Phoenix Theatre); Britten in Brooklyn (Wilton’s Music Hall); Bend it like Beckham (Sonia Friedman Productions, Phoenix Theatre); Made in Dagenham (Stage Entertainments, Adelphi Theatre); Monty Python Live Reunion (Phil McIntyre, O2 Arena); The Bodyguard (David Ian Productions, Adelphi Theatre); Batman Live (Nick Grace Management, International Tour); Love Never Dies (Really Useful Group, Adelphi Theatre); Spamalot (Laughalot, Palace Theatre); Chitty Chitty Bang Bang (Michael Rose, International Tour); Tonight’s the Night (Phil McIntyre, UK Tour).