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We cultivate people who build strong relationships, communicate openly and are passionate about their work — because collaboration and innovation thrive on these qualities. View Leadership View Our People

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Our People

Collaboration is the cornerstone of our success. Our people are its foundation.

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Richard Vivenzio Senior Vice President

Ft. Lauderdale

+1.917.661.7874

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Brent Vollenweider Senior Principal & Boston Office Co-Director

Boston

+1.617.250.4134

Catherine Wang Senior Associate

Chicago

+1.312.596.2000

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Derek Wassink Associate Principal

Ft. Lauderdale

+1.954.903.9320

Michael Wesolowsky Principal & Ottawa, Mississauga & Halifax Office Director

Mississauga

+1.905.271.7888

Claudine Williams Associate Principal

New York

+1.212.839.5276

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Pawel Woelke Senior Principal & Applied Science Practice Co-Leader

New York

+1.212.367.2983

Chan Zhou Associate

New York

+1.212.367.2825

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Recent News

Principal Elisa Paone (left) and Senior Project Director Barbara Gao (right)

Thornton Tomasetti

Key Insights for Facilities Managers

August 12, 2025

In a FacilitiesNet/NFMT article, Principal Elisa Paone and Senior Project Director Barbara Gao share practical strategies for assessing risk and developing a framework for building operational resilience.

Thornton Tomasetti

Vice President Melissa Hertel Named a Top Women in Maritime Award Winner

August 07, 2025

Vice President Melissa Hertel has been named a Top Women in Maritime Award winner. She is one of 20 honorees selected by Marine Log magazine for their achievements and contributions in shaping the future of the maritime industry.

Courtesy Wikimedia Commons

Reflecting on Hurricane Katrina: 20 Years Later

August 04, 2025

The record-breaking 2005 hurricane season, with 27 named storms, highlighted the need for forensic analysis, and Katrina’s lessons continue to shape resilient design and coastal defenses, preparing communities for future climate-driven storms.

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