She is the founding artistic director of Visible Theatre Ensemble, having previously founded Iceandfire Theatre (a company that explores human rights through performance (nominated for a Liberty award in 2010).Sonja's plays for iceandfire include: On A Clear Day You Can See Dover (Wilton's Music Hall, Crucible Theatre, Sheffield and UK national tour), Welcome to Ramallah, co-written with Adah Kay, and its companion piece, Palestine Monologues, (Arcola Theatre, York Theatre Royal, Compass Theatre, San Diego) Crocodile Seeking Refuge (Lyric Hammersmith, UK national tour), Asylum Dialogues (Tricycle Theatre and UK national tour), I Have Before Me a Remarkable Document Given to Me by a Young Lady from Rwanda (Finborough Theatre, UK and USA tours, BBC World Service Radio), and Asylum Monologues (UK national tour). Born in London to German refugee parents, Sonja is a theatre producer and writer whose plays have been produced on radio and on stage throughout the UK and the United States.