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Construction & Design

Thornton Tomasetti restructures management team as firm celebrates 70 years

Thornton Tomasetti’s board of directors announced the latest evolution in its leadership as the firm marks its 70th anniversary.

As of January 1, 2020, New York-based managing director Peter DiMaggio and managing principal Michael Squarzini become co-CEOs, with current CEO & chairman Tom Scarangello assuming the role of Executive Chairman.

Washington, DC-based managing principal Wayne Stocks becomes president.

Stocks, along with San Francisco-based managing director Gary Panariello, now co-lead the firm’s business units. Raymond Daddazio, who currently serves as president, will become senior consultant.


He will support the development of services for clients in the federal market sector, guide the success of transportation/infrastructure-related initiatives, and continue his participation in the firm’s R&D and innovation efforts. He will also serve as chairman-elect of the American Council of Engineering Companies of New York.

“On behalf of the board of directors, I am delighted to welcome Pete, Mike, Wayne and Gary to their new roles,” said Scarangello.

“Their leadership, expertise and teamwork will be critical to the success of our five-year plan and move us all closer to achieving our ultimate goal of being a leader of change and innovation in our industries.” The new executive team, who all serve on the company’s board, will lead the firm’s plan to drive innovation based on four key components that all serve to strengthen the enduring organization and its delivery of services: Vitality, ingenuity, expanding opportunity and people.

DiMaggio is a 25-year veteran of Thornton Tomasetti and Weidlinger Associates, is a recognized expert in special structures and protective design and security, directing many of the firm’s high-profile and challenging assignments worldwide, including more than 75 embassies and federal facilities.

Recruited by Thornton Tomasetti straight out of college, Squarzini specializes in structural analysis, design and review of buildings, including sports venues and healthcare facilities.

Stocks has more than 25 years of experience in structural design, construction and project management for new buildings and historic structures.

Panariello is an expert in forensic engineering and seismic evaluation. Among his first assignments at the firm was working on site as part of the World Trade Center disaster response.

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