HNTB Email Format
Civil EngineeringUnited States5001-10000 Employees
HNTB is a United States–based civil engineering firm with a history spanning more than a century. It provides a broad spectrum of infrastructure services, including bridges, highways, distinctive architecture, and digital infrastructure, grounded in a collaborative approach and technical rigor. The company is employee-owned, bringing together diverse experience to support clients and communities seeking safe, efficient, and resilient infrastructure. In 2026, the firm expanded its St. Louis office, marking the growth of its regional footprint with a ribbon-cutting at One Metropolitan Square. This development underscores HNTB’s ongoing presence and ability to deliver projects across the United States.