Weidlinger Associates^® was founded in Washington, DC, in 1949, established headquarters in New York in 1951, and became a corporation in 1982. The firm currently employs 350 people worldwide and generates approximately $55 million per year. Paul Weidlinger pioneered in the fields of high-rise buildings and high-strength concrete and collaborated with many renowned 20th-century architects. The firm owes its reputation for innovative design to the distinguished group of engineers he chose as partners, five of whom joined him as elected members of the National Academy of Engineering.

Early on, the firm took a singular direction with the addition of an applied science division, which ensured early and continuing use of computers to develop sophisticated advanced analysis programs for innovative research. Advanced computational analysis remains a vital force at Weidlinger. It supports special services offered by the firm, including vulnerability assessment; risk analysis; forensic, earthquake, wind, and blast engineering; soil/structure interaction; and sustainable design. It is responsible for the multi-disciplinary approach that Weidlinger took as leaders of the most comprehensive study of the World Trade Center tower collapses to date, for which the firm won the country’s most prestigious engineering award in 2004. It has also produced landmark structural designs, from the CBS Building and Bienecke Library at Yale University to the more recent Georgia Dome, Rose Center for Earth and Space, and signature suspension span of the San Francisco-Oakland Bay Bridge, now under construction.

Weidlinger’s commitment to applied science led most directly to the development of state-of-the art software tools to meet the challenges of research projects for which commercial software products either didn't exist or proved inadequate. A valuable company resource, the software is designed for computational efficiency on the latest computers and is verified and validated to ensure accurate solutions. Each program is specialized for its particular field of application and produces high-fidelity results at a speed that meets or exceeds that of competing products. These cutting-edge scientific modeling tools, which are sold commercially, are used to support corporate, academic and government research. They have earned Weidlinger the reputation of being a trusted name in computer simulation for a variety of industries from medical imaging and therapeutics to building design and telecommunications. EPSA^TM, SRUE^TM, ELSHOK^TM, UNDEX^TM, and WASCAT^TM are Weidlinger programs that were developed to meet the US Navy's need for accurate modeling of surface ships and submarines, INTEGRA^TM is used for locating new oil reservoirs. The FLEX family of commercially available programs began with NLFlex^TM, one of the most advanced programs of its kind for simulating the response of structures to blast and impact and for assessing collapses and progressive collapse potential. Almost thirty years of verification and validation sets it apart from other seemingly similar products. PZFlex, an offshoot of NLFlex, has been adopted worldwide as the premier 21st-century virtual laboratory for designing piezoelectric and electrostatic devices and improving their manufacture.