Mary Susanne Lamont is President of M.S. Lamont and Associates, which provides investment management for high net worth individuals. Since 1981 she has been known for her "Ladies' Luncheons" which provide different venues across Canada for professional women to meet and contribute to many charities in health, culture, education and sports. She is on the Women’s College Hospital Advisory Council and the Board of Directors of Canada’s National Ballet School Foundation.

Her interests are tennis, golf, reading, and summers in Algonquin Park.