HNTB Corporation is an architecture, civil engineering consulting and construction management firm that was founded in 1914. Its headquarters are in Kansas City, Missouri, but the firm has numerous offices across the United States. The firm has designed many bridges, roadways, airports, professional sports stadiums and rail and transit systems across the United States and around the world.
John Lyle Harrington, Ernest Edward Howard and Louis Russell Ash founded the firm as Harrington, Howard & Ash in 1914 specializing in the design of moveable bridges.
In 1941 it changed its name to Howard, Needles, Tammen & Bergendoff when Enoch Needles, Henry Tammen & Ruben Bergendoff join as partners.
In 1975 it merged with Kivett and Myers to form a sports architecture practice.
In 1982, it acquired the rail firm of Thomas K. Dyer adding track, signal, communications and traction power to its portfolio, thus positioning the firm to serve the rail industry.
In 1993 it formally changed its name to HNTB Corporation.
In 2000 the firm became employee-owned.
The firm provides infrastructure services in the following areas.
In 2014 Airport Business Magazine recognized two of the company's aviation experts, James Long PE and Jennie Santoro, with a “Top 40 Under 40” award. The annual award by the magazine recognizes 40 aviation industry professionals under the age of 40 for their academic, professional and community achievements.
Ted Zoli is currently the National Bridge Chief Engineer at HNTB. In 2012, he received Engineering News-Record’s Award of Excellence.
The company is a supporter of high-speed rail projects.
In 2012 the company was awarded a contract for the final design of the Green Line Extension project in Boston.
In 2006 the American Public Works Association named the High Five Interchange as the "Public Works Project of the Year" for its massive size, its innovative design, the complexity and rapidity of its construction and the need it fulfilled for the community. HNTB Corporation received the award as the primary consultant, along with the Texas Department of Transportation as the managing agency and Zachry Construction Corporation as the primary contractor. The award was in recognition of their cooperative alliance in completing the project.
The company won an award for the repair of the John E. Mathews Bridge after it was severely damaged by a ship impact in September 2013.