Siân is a graduate of the MA Writing for Performance Programme at Goldsmiths College. Her play RESTORATION won the Oxford Playhouse New Writing Competition. She has been part of the Sherman Cymru Advanced Writers Group and the Royal Court Studio Group. She has been part of the invitational BBC Writers Group-Welsh Voices and was long-listed for the BBC/NTW Wales Writer in Residence Scheme 2019. She is currently on attachment at the National Theatre.