Marcia Johnson was Chair of PGC's Women's Caucus from 2006 - 2010. She has had two OAC Playwright Residencies at Roseneath Theatre and Blyth Festival. received a Toronto Arts Council grant to develop Jumping Ship, based on the lives of her paternal grandparents. Marcia attended the International Women Playwrights Conference in Mumbai with her play Say Ginger Ale which was subsequently produced at the 2010 SummerWorks Festival. Other plays include Late (Obsidian Theatre Company), Courting Johanna (Blyth Festival), and Binti's Journey (Theatre Direct Canada).
Marcia has participated in playwrights' groups at Obsidian Theatre Company, Theatre Passe Muraille and Canadian Stage Company (Bash). She has taken part in two playwriting master classes with Carole Frechette (through the Siminovitch Prize in 2005 and Playwrights Workshop Montreal in 2011) and Tapestry New Opera's Composer-Librettist Laboratory (Lib Lab). Marcia's short opera My Mother's Ring was nominated for a 2009 Dora Mavor Moore award and she continues to collaborate with its composer, Stephen A. Taylor.
Also an actor, Marcia's professional acting debut was in 1983 on the CBC TV series Hangin' In. Recent acting roles include The Real McCoy by fellow actor/playwright Andrew Moodie at Factory Theatre in Toronto and Great Canadian Theatre Company in Ottawa. She was also an original cast member for the 2007 Fringe runaway hit, The Gladstone Variations.
Recent publications include Linden’s Sister in the collection More than a Play (Elementary Teachers’ Federation of Ontario) and Late (short version) in Give Voice: Ten Twenty Minute Plays from the Obsidian Theatre Company Playwrights Unit, ISBN 978-0-88754-969-4.