Howard has taken leading roles at the Royal Shakespeare Company, the National Theatre, the Royal Exchange Theatre, the Royal Court Theatre, The Almeida, Shakespeare’s Globe Theatre, Hampstead and Headlong. Howard’s versatility means he is used for a huge variety of voice projects from cartoons to documentaries.

Howard has been in the original cast of Warhorse, The Curious Incident of the Dog in the Night-time, and Oslo, all which originated at the National Theatre, and then transferred to the West End. He was also in the original cast of the multi award winning musical London Road at the National Theatre which was subsequently made into a movie.