Mark is the Associate Dean (Undergraduate Studies) and an Associate Professor at the School of Planning of the University of Waterloo. He has worked as a practising planner in New Zealand, Calgary, and Ottawa. He became a professor of planning at the University of Waterloo in 1998. Current and former students have commented on the quality of his teaching, his mentorship abilities, and his personal style of relating to faculty, students, and practitioners as colleagues. He is known internationally for his research on indicators, evaluation and monitoring in planning, and served as Chair of the Board of Directors for the Waterloo Community-University Research Alliance (CURA) project funded by the Social Sciences and Humanities Research Council of Canada.

He was President of CIP for 2000–2001, and has been chair of the CIP Policy Committee since 2007. In addition to his considerable contributions to the work of his local affiliate, OPPI, he has contributed to membership courses for the Association of Professional Community Planners of Saskatchewan. He has been nominated for his remarkable career spanning professional practice, teaching and mentorship, research, and service to the profession across Canada and internationally.