The founding corporation of MMM Group Limited was established in 1952 and incorporated in 1957 as Marshall Macklin Monaghan Limited. Renamed MMM Group in 2007, the firm’s head office is in Thornhill, Ontario. MMM Group has offices in Nova Scotia, Ontario, Quebec, Manitoba, Saskatchewan, Alberta and British Columbia and through its subsidiaries and affiliates, more than 25 offices in the USA, U.K., Australia, New Zealand and the Caribbean. Together MMM staff provide responsive and innovative consulting engineering, planning, project management, environmental management, landscape design, surveying and commissioning services to private sector owners, architects, contractors, investors and government clients.

In November of 2010 Enermodal Engineering joined the MMM Group incorporating the fields of sustainability and building commissioning. Through Enermodal/MMM addressing the renewable energy and conservation market, MMM supports sustainability services in the buildings, infrastructure and transportation sectors. MMM Groups’ professional consulting services include in the Buildings, Infrastructure and Environment, Transportation and Geomatics sectors.