Initially Marie worked as an actress after training for three years at the Royal Central School of Speech & Drama. She has appeared in theatre and on TV, radio and film. She was artistic director of the theatre company Bedside Manners for 16 years, which toured and produced 45 original productions from Scotland to Cornwall, via the West End. Marie has written extensively for theatre (29 plays and musicals produced), film and television. In 1999 she was nominated for the TAPS (Television Arts Performance Showcase) writer of the year award for her sit-com St Hoggen.
Other television work includes 11 episodes of The Tribe (Cloud 9, Channel 5, and broadcast world-wide) Revelations (Cloud 9, Channel 5); she was commissioned to write two drama series for the BBC and a 12 part drama series for S4C. Marie has been commissioned to write five feature films and has had one feature optioned. In 2010 her low budget supernatural horror, The Dark Side, was selected to be part of the Cross Channel Film Lab development scheme in Brittany and Cornwall. In 2014 she worked on a zombie horror film, The Dead Sea. As a director and/or producer Marie has worked on over 75 shows for a variety of theatre companies and numerous short films. She has worked extensively as a script editor for Cornwall Film; UK Film Council; Kent Hothouse and Screen South; and many individual writers. Marie is a judge for the Celtic Media Festival, a BAFTA voter and on the committee for the Royal Television Society (Devon & Cornwall). For many years she was on the Executive council for the Writers' Guild of Great Britain. She hopes to finish her second novel Strawberry Moon in 2018. She completed Verity, a feature film screenplay in November 2017 and is planning to shoot in 2019.