Roemer was originally trained as a screenplay writer in the national Dutch Film Academy and finished in 1997. From there he took on improv in 1999, and improv teaching in 2001. At the age of 40 he decided to do four years of acting school. In teaching he combines these three disciplines to find richer forms of improvisation and specialised in strict but loving side coaching. He momentarily plays with the Dutch groups Rocky Amaretto (theatrical improvisation), Vastgoedtoneel (improvised plays on location) and directs the group The Station (improvisers and actors).