Our People

John J. Mahan

Senior Project Manager
E: jmahan@c3boston.com
T: 617.330.9390

John has been in the operations and construction fields for more than 35 years. Since joining C3 in 2014, he has worked with many owners and investors of hotels, apartments, Class A office, biotech labs, convention and exhibit halls and many other specialties as an owner’s representative during construction and renovation. His experience includes projects ranging from $10 million to over $200 million throughout North America and Africa.

He started his career in the biotechnology industry working for Johnson & Johnson, Ortho Pharmaceutical and National Institutes of Health, responsible for facilities in Massachusetts and California. He managed the ground-up construction of many facilities and facility expansions in Puerto Rico, Ireland, California, and Massachusetts.

John also worked in the hospitality industry for 15 years, responsible for facilities engineering operations and improvements, including guest area renovations, and served as owner’s representative during a major addition to a downtown Boston hotel. His experience in the construction field includes a ground-up addition and renovations to a 5-star hotel. He also has vast experience in the senior living and Class A office industries.

He has participated in professional organizations, including the Hotel Engineers Association and the Electrical Council of New England, and volunteered as a member and chairman of the Automatic Sprinkler Appeals Board for the State of Massachusetts

An avid outdoorsman, John likes to ski, snowmobile, hike, boat, and spend time with his family and working on projects around his home.