Best-in-class market expertise, geographic and service line diversification and critical mass help drive companies to real success. Our firm has all of those attributes, plus the velocity and enthusiasm necessary to achieve solid growth and innovation.

Grant McCullagh is an outside director on Thornton Tomasetti’s board of directors. Grant has served on a number of public and private company boards, including WSP and Weidlinger Associates, which merged with Thornton Tomasetti in 2015.

Broad Leadership Experience
Grant combines an A/E technical and operations background with a deep understanding of corporate finance. He has more than 35 years of management experience, having served as a senior executive for a Fortune 500 firm, global engineering and construction companies and entrepreneurial startups as well as an operating partner at several global private equity firms active in the engineering and construction industries. He has worked across numerous industry sectors including complex facilities, transportation, water, environmental and government services.

Outside of Work
Grant and his wife Suzanne have two adult sons. He enjoys sailing and hiking in Maine’s Mt. Desert Island, where the family has a vacation home. He also serves on a variety of institutional boards in the Chicago area, which is his home base. Grant has the distinction of having danced with Princess Diana during her first trip to Chicago in 1996.

• Strategic planning and organizational leadership
• Corporate finance and capital structure
• Mergers and acquisitions
• Startup and high-growth organizations
• Public company platforms