Clark Lyster	Assistant Houseparent, Barnacle House
Susan MacDonald	English Teacher, Senior School
John MacKay	President, SMUS Parents' Auxiliary
Brian Maclean	Bus Driver
Jennifer Mao	Modern Language Teacher, Senior School
Kristy Martens	Physics Teacher, Senior School
Stanley Mason	After-School Care and Camps Coordinator Assistant Houseparent, Barnacle House
Lauren Mavrikos	Counsellor, Senior School
Jake McCloskey '09	Humanities, Physical and Health Education Teacher, Middle School Alumnus, Class of 2009
Cameron McClure	Bus Driver
Ruth McGhee	Director of University Counselling Academic Advisor
Melissa McGrath	Educational Assistant, Middle School Assistant Houseparent, Winslow House
Mary McLeish '89	Teacher, Junior School
Kerri McLeod	Accounting Associate, Finance
Morgan McLeod	Drama and Theatre Teacher, Senior School Head of Theatre