Branwen is a playwright, dramaturg and theatre director. She is a member of the theatre company Dirty Protest and Os Nad Nawr. Branwen was the Literary Manager of the Sherman theatre until recently. She is currently responsible for re-establishing the Urdd Youth Theatre. Branwen has worked with a number of Welsh theatre companies including Illumine, Papertrail, Theatr Genedlaethol Cymru, Volcano, Criw Brwd, Frân Wen and Blas, Pontio.