Gary McAllister, P.E.

Portland, ME

"We strive to earn and grow the Client’s confidence in us as their consultant, partner, and advocate."

About Gary

Gary McAllister has 29 years of engineering experience including 13 years with GZA, currently serving as Principal and Sr. Vice President. For more than a decade, Mr. McAllister has led multi-disciplinary projects and programs for GZA’s top power and oil & gas clients. Over his career he has led or supported engineering services to over 600 design and construction projects for Power, Oil & Gas, General Building, Industrial / Manufacturing, Transportation, and Education / Medical Industries facilities located in 30 U.S. States and Canadian Provinces.


His role at GZA also includes Energy Sector Lead; a leadership and advisory role supporting GZA’s practitioners and managers in the successful completion of projects and sustainable growth in the Energy sector.


His areas of specialization are geotechnical engineering with emphasis on drilled and driven foundations, as well as flood hardening for critical infrastructure. He earned his Bachelor of Science and Master of Science degrees in Civil Engineering from the University of Maine and is a professional engineer licensed in ME, NH, MA, CT, RI, FL, NC, and GA.


His professional activities include membership with the IEEE Power & Energy Society, and American Society of Civil Engineers. He has served on the Board of Directors for the Society of American Military Engineers, Piscataqua Post for 8 years, including President, Membership Chair, and Fundraiser Chair, leading the Post to continual years of Distinguished Status, and raising over $40,000 for STEM grants and scholarships. He continues his long track record of active involvement in professional societies, coordinating and hosting technical meetings, authoring and presenting technical papers, and contributing to newsletters and infrastructure reports.