Weidlinger Associates

Weidlinger Associates, Inc.

Type	Corporation
Industry	Civil and structural engineering, applied science
Founded	Washington, DC (1949) (as Paul Weidlinger, Consulting Engineer)
Headquarters	New York, New York
Key people	Dr. Raymond Daddazio, President and Chief Executive Officer
Number of employees	300 (2010)
Website	www.wai.com

Weidlinger Associates, Inc., is a U.S.-based structural engineering firm that designs and rehabilitates buildings, bridges, and infrastructure and provides special services in applied science, forensics, and physical security. Weidlinger’s clients include corporations, private clients, institutions, and federal, state and local governments. The firm is headquartered in New York City, with branch offices in Massachusetts, Connecticut, New Jersey, California, New Mexico, and Washington, DC. The firm also conducts business as Weidlinger Associates, Ltd., in Scotland, UK.

Weidlinger Associates was founded by Paul Weidlinger, a graduate of the Swiss Polytechnic Institute in Zurich, as Paul Weidlinger, Consulting Engineer, in Washington, DC, in 1949. The company moved its headquarters to Manhattan in 1951; was renamed Weidlinger Associates Consulting Engineers in 1974; and was incorporated as Weidlinger Associates, Inc., in Cambridge, Massachusetts, in 1982. Dr. Jeremy Isenberg succeeded Paul Weidlinger as president and CEO in 1993, and Dr. Raymond Daddazio succeeded Dr. Isenberg on January 1, 2006. In 2011, the firm became a general business corporation under the laws of New York State. The firm currently employs approximately 300 people.

On September 8th, 2015 it was announced that Weidlinger Associates had merged with structural engineering firm Thornton Tomasetti.

The firm has three business units: Transportation, Buildings, and Applied Science & Investigations, which encompasses investigations, security, and the FLEX family of software products, including PZFlex for virtual prototyping.

Much of Weidlinger’s experience in transportation and bridge engineering reflects the rehabilitations the company has designed in the New York metro area for the Brooklyn, Manhattan, RFK (Triborough), Bronx-Whitestone, and Tappan Zee Bridges. The firm’s work on these historic structures has broadened Weidlinger’s expertise in correcting original defects and preventing future fatigue. Weidlinger has also worked on other major bridges including the Walt Whitman Bridge, Benjamin Franklin Bridge, Cooper River Bridges, Richmond - San Rafael Bridge, Iowa DOT I-74 Bridges, Red River Bridge, and Victory Bridge (New Jersey). The company also designed the steel deck sections of the self-anchored suspension span of the San Francisco-Oakland Bay Bridge. In 2004, Ronald Mayrbaurl and Sante Camo, two Weidlinger principals, published the first-ever guidelines for the inspection and evaluation of suspension bridge cables.