Lee began her career in 1985 as a Corrective Makeup Specialist at the CosMedic Clinic at Sunnybrook Health Sciences Centre. Her work there required her to find products that could offer her clients therapeutic benefits and environmental protection while being free of all irritants and suitable for even the most sensitive skins. In addition, Toronto's multi-cultural population made it impossible to provide full-coverage and an extremely natural look without developing a broad colour spectrum, one capable of perfectly matching almost any skin colour on the planet. When Lee was unable to find the products that fit those standards, she led the effort to develop the product line that today is known as Cover FX.
Lee continues her work as a Corrective Makeup Specialist to this day. She tests all Cover FX products at Sunnybrook Health Sciences Centre to ensure that they are safe, effective and irritant free for all skin types and all ethnic backgrounds. In addition to her work with Cover FX and Sunnybrook, Lee has been instrumental in the creation of similar clinics at NYU Medical Centre in New York City, Henry Ford Hospital in Detroit Michigan and Howard University in Washington, DC.