Susan began her journalism career at the Miami Herald and held internships at The New York Times. She went on to serve for several years as a staff writer at Maclean’s magazine, where she specialized in feature writing and investigative reporting. As a freelance journalist, Susan has contributed to leading international publications including The Sunday Times Magazine, Glamour, Marie Claire, The Guardian, and The Walrus.

Described by Quill & Quire as a pioneer in trauma-informed reporting, Susan’s books—creative non-fiction for both adult and young adult readers—have been published in more than 30 countries. Her work has earned numerous honors, including a Kirkus Best YA/Memoir distinction and multiple Ontario Library Association Red Maple Awards.

Susan’s impact extends into documentary film. She served as researcher and narrator for The Nanny Business, directed by Academy Award-nominated filmmaker Shelley Saywell, which was inspired by Susan’s investigative reporting on Canada’s Live-In Caregiver Program and the global migration of women for domestic work. She is currently leading the film adaptations of two of her books.

Susan and her daughter, Charlotte Lindsay Marron—a professional actor, finance major, and producer—co-founded Full Cup Productions Ltd., a media company built on the belief that the most powerful stories are the ones that reveal what society tries to hide. Full Cup is driven by the idea that behind every surface lies a deeper truth. From unspoken rules to buried secrets, Full Cup aims to tell stories that challenge, expose, and connect. Their slate includes socially conscious, thought-provoking unscripted and scripted content spanning true crime, lifestyle, and documentaries. In 2025, Susan and Charlotte won the prestigious Realscreen Propelle: A+E Factual Development Accelerator at the Realscreen Summit in Miami, securing development deals with A&E and Lifetime.