 In 1986, she joined the Royal Shakespeare Company, and the Royal National Theatre, the first female musical director with both companies.In 1990, she co-founded the theatre company Phoebus Cart with her husband Mark Rylance.Since the opening of the Shakespeare's Globe Theatre in 1997, van Kampen has been the Director of Theatre Music, creating both period and contemporary music for 30 of the Globe's productions – including the 'jazz' "Macbeth" in 2001, and "The Golden Ass" in 2002, which contained a 30-minute opera "Cupid and Psyche".