Leah is Co-Artistic Director with Martha Ross of Theatre Columbus where she creates and directs new Canadian plays. For the company she has directed many collectively created works including Hotel Loopy, Lonely Nights and Other Stories, and The Betrayal, (winner of 1999 Floyd S. Chalmers Canadian Play Award). Leah has also directed classics for Theatre Columbus such as Twelfth Night, The Cherry Orchard (co-director), and adaptations of The Barber Of Seville and Peer Gynt. Leah directed and co-wrote The Anger In Ernest & Ernestine which was published in 1990 and has been performed in theatres across Canada and internationally. In 1997 she created and performed the role of Jelly in The Attic, the Pearls and Three Fine Girls, a collaboratively written play. In 1992 she received the Pauline McGibbon Award for directing.

Leah also directs for other theatres in Canada, more recently New Canadian Kid by Dennis Foon at the Lorraine Kimsa Theatre for Young People and Rune Arlidge by Michael Healey at Tarragon Theatre. Leah also teaches theatre with clown as her specialty. She taught for fourteen years at the National Theatre School of Canada and now teaches in the Ryerson University Theatre Program and George Brown College.