HNTB Expands Transportation Infrastructure Practice with Hiring of Two Highway and Bridge Experts

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Tiberi and Vahdat Fill New Positions in the Firm’s West Division

David Tiberi, HNTB Corporation

David Tiberi, PE, PMP, CCM, is HNTB regional construction leader and vice president.

The addition of these two leaders builds our portfolio of transportation infrastructure proficiency, expands our construction management expertise and more closely aligns our services with what transportation agencies in the region need.

HNTB Corporation has expanded its West Division transportation infrastructure practice and construction management capabilities by adding two leaders in California. David Tiberi, PE, PMP, CCM, and Shahram Vahdat, PE, have joined the firm’s growing highway and bridge planning, design and construction practices.

“David and Shahram not only bring invaluable expertise to our transportation practice, they also possess exceptional talents for building and maintaining client relationships,” said Victor Martinez, PE, HNTB Southern California district leader. “The addition of these two leaders builds our portfolio of transportation infrastructure proficiency, expands our construction management expertise and more closely aligns our services with what transportation agencies in the region need.”

David Tiberi, PE, PMP, CCM, has joined HNTB as regional construction leader and vice president. In this role, he will oversee the construction of public works and infrastructure projects and maintain his already strong relationships with the California Department of Transportation, the Los Angeles County Metropolitan Transportation Authority, San Bernardino Associated Governments, and the Orange County Transportation Authority. In addition to these responsibilities, he will provide technical knowledge of highway, bridge, building and rail-grade separation construction. Tiberi will work from HNTB’s Santa Ana, California, office.

Tiberi has nearly three decades of diverse industry experience leading cross-functional units in several aspects of transportation engineering consulting. Most recently, he served as construction services practice manager and executive vice president for another consulting firm. His many achievements include providing planning, engineering, construction and program management for California infrastructure projects in Los Angeles, San Francisco and San Bernardino.

Tiberi also has served as a structure representative for Caltrans and an assistant resident officer in charge of construction for the U.S. Navy. He is involved in several industry organizations, including the American Society of Civil Engineers, Construction Management Association of America and the Society of American Military Engineers. Tiberi earned his bachelor’s degree in civil engineering from the University of California, Berkeley, and his master’s degree in civil engineering-structures from California State University, Northridge.

Shahram Vahdat, PE, has joined HNTB as group transportation director and vice president. Based in HNTB’s Los Angeles office, he will lead highway planning and design projects, specifically using his expertise in roadway and interchange design and arterial access improvement projects. Vahdat will use his extensive knowledge of roadway geometry, drainage, signals, lighting and application of various engineering software.

Vahdat has devoted more than 30 years of his career to serving the infrastructure construction industry. Most recently, he was an office manager in Los Angeles for another engineering firm and, throughout his career, has provided leadership for numerous infrastructure projects in Pasadena, Irwindale, Vernon and Los Angeles.

Vahdat is a member in the American Society of Civil Engineers, the American Council of Engineering Companies, the Project Management Institute and the Construction Management Association of America. He earned his bachelor’s and master’s degrees in civil engineering from Shiraz University – formerly known as Pahlavi University – in Shiraz, Iran.

HNTB is currently working on several multimillion-dollar infrastructure projects in California, including the Presidio Parkway Doyle Drive replacement; the Bay Area Rapid Transit Warm Springs Extension Project, track station and systems contract; the Alameda Corridor-East San Gabriel Trench grade separation; the Interstate 405 Sepulveda Pass Improvements Project; the BART Earthquake Safety Program; the Caltrain Jerrold Avenue Bridge Replacement; Sixth Street Viaduct Replacement; Doran Street grade separation; and the Kraemer Boulevard railroad grade separation project.

HNTB Corporation is an employee-owned infrastructure solutions firm serving public and private owners and contractors. HNTB’s work in California dates back to its founding in 1914. Today HNTB continues to grow in size and service offerings to clients in California from seven office locations, currently employing more than 350 full-time professionals. Now celebrating a century of service, HNTB understands the life cycle of infrastructure and addresses clients’ most complex technical, financial and operational challenges. Professionals nationwide deliver a full range of infrastructure-related services, including award-winning planning, design, program delivery and construction management. For more information, visit

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