Mary teaches Bioethics and Law, Animals and the Law and Contract Law in the J.D. program and Legal Research and Theory in the Masters of Law program. She is a Research Affiliate of the Centre on Aging at the University of Manitoba. Her principal area of research is bioethics and law, and her work includes research related to palliative care, aging and death as well as the environment and animals. Her research on end of life has been published in the McGill Journal of Law and Health, Health Law in Canada and the Canadian Medical Association Journal. She is co-author of the 4th edition of the book, Canadian Medical Law: An Introduction for Physicians, Nurses and Other Health Care Professionals.