One of the most trusted U.S.-based design firms,[3] HNTB generated a revenue of $3 billion in 2023, the second most of any architectural firm in the U.S.[4] The firm specializes in sporting facilities; Levi's Stadium, in which HNTB was ranked third on a list of the World's Top 10 Most Innovative Companies of 2015,[5] and Allegiant Stadium; transportation services such as airports, bridges, tunnels, roadways, and rail and transit systems, including renovations in places such as at Los Angeles International Airport and Dallas Fort Worth International Airport, and projects for educational institutions, which includes at the College of William & Mary, University of Southern California, and University of Michigan.

The firm consists of around 7,200 professional staff across 79 locations, and is active in all major architectural specialties in the United States and around the world.

[6] HNTB's architecture projects have included Levi's Stadium in San Francisco, home of the San Francisco 49ers, completed in 2014;[7] the Wichita Dwight D. Eisenhower Airport terminal, which opened in 2015;[8] an expansion of Kroger Field at the University of Kentucky;[9] Camping World Stadium reconstruction in Orlando in 2014;[10] and Bartle Hall Convention Center Ballroom Expansion in 2007.

[11] In 2014, Airport Business Magazine recognized two of the company's aviation experts, James Long PE[12] and Jennie Santoro,[13] with a "Top 40 Under 40" award.

The firm created the conceptual design for the 221-foot-tall air traffic control tower at San Francisco International Airport.

[15] HNTB was lead architect and performed initial planning and engineering services on the San Diego International Terminal 2 expansion project.

[24] In 2017, the project earned a National Awards of Merit in the Transportation category from the Design-Build Institute of America.

[25] HNTB led the final design for the Leonard P. Zakim Bunker Hill Memorial Bridge in Boston.

[26] 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.

[46] HNTB was part of a joint venture that was lead designer on the Dallas Area Rapid Transit South Oak Cliff Extension 3 project.

[56] Ashley Booth, HNTB's national streetcar practice leader, was named to Mass Transit Magazine's Top 40 Under 40 2017 list.

[57] Tim Faerber, PE, a senior vice president at HNTB, received ENR Midwest's Legacy Award in 2017.