He is a member of the university's Joint Centre for Bioethics and Centre for Ethics. He holds law degrees from the K.U. Leuven and McGill University. Dr. Lemmens has been a member of the School of Social Science at the Institute for Advanced Study in Princeton, a Visiting Professor at the K.U. Leuven and the University of Otago and an Adjunct Professor at Osgoode Hall Law School. He is a member of the Advisory Committee on Health Research for the Pan American Health Organization.