Phil Clark trained at Rose Bruford College of Speech and Drama where he studied for a Diploma in Theatre Arts and a teaching qualification.
His professional career began as a founder member of Theatr Powys before becoming a founder member of Bruvvers Theatre Company based in Newcastle upon Tyne.
In 1983 he joined Tyne Wear Theatre Company as a Director and established and directed Britain's largest annual Youth Theatre Festival. 
The position of Artistic Director at the Crucible Theatre in Education and Community Theatre followed. While in Sheffield, Phil was also on the advisory panel for Tertiary Education for Sheffield Education Authority and established a programme of training for school governors on 'Theatre for Young People'.
He was appointed Artistic Director and Chief Executive of the Sherman Theatre Cardiff in 1990. He prioritised new writing and commissioned some 104 new plays for the company.   In 1993 he was nominated BBC Artist of the Year.
He received the Arts for Young Audiences Award from the Commonwealth Conference for Young People in Canada.  He has edited two new books of Welsh plays and a collection of his plays has been published by Oberon Books.