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Executive Messages

Chairman & CEO's Message


The founders of our firm – Lev Zetlin, Charlie Thornton and Richard Tomasetti – set goals for growth that are both ambitious yet grounded in the framework of the culture they established more than 50 years ago. That culture, a meritocracy that cultivates technical excellence, innovation and collaboration in an entrepreneurial environment, continues to set us apart today.

Whether expanding into developing markets around the world, adding services in anticipation of our clients’ needs or innovating by providing tomorrow’s project delivery systems today, we rely on the lessons of our past to guide us into new and exciting areas.

Making the most of our diverse talents allows us to help our clients achieve their unique visions, and challenges all our people to challenge convention. Whether you’re a client, colleague or a young professional, we welcome your joining us as we build the future

President's Message

Robert DeScenza


At Thornton Tomasetti, we welcome the diverse project assignments that our clients entrust to us. Whether the focus is on designing new buildings or dealing with issues related to existing buildings, we relish these challenging projects and our role in assisting the team in developing solutions.

We strive to continue to attract the best and the brightest talent, provide opportunities and career paths for our staff and develop our leadership as we grow and evolve with the building industry. Our staff of more than 700 professionals leverages their individual experience and expertise to draw upon the broad resources of the firm to meet our clients’ needs. We will continue to look for opportunities to expand our geographic reach.

Our six practices — Building Structure, Building Performance, Building Skin, Property Loss Consulting, Construction Support Services and Building Sustainability — foster synergy and collaboration within the firm. As a 100% employee-held company, we are focused on being nimble and adapting to our changing industry to ensure the continued success of our clients.