

The firm has evolved through strategic partnerships, including Hardesty in 1927 and Hanover in 1945, becoming H&H.
Its legacy includes the construction of the Illinois Central Missouri River Bridge and the world’s first major vertical
lift bridge.
H&H has delivered signature structures such as the Rainbow Bridge, Goethals Bridge, and the Interstate 80 interchange in Paterson, NJ.
The company excels in complex movable and fixed bridge design, highway interchanges, rail facilities, and kinetic architectural structures.
Recent growth includes acquisitions of Corven Engineering and P.E. Structural Consultants, enhancing expertise in bridge design.
H&H showcases engineering daring with lasting impact, from Ferris
wheel attractions to modern infrastructure.
Serve Passionately
Work Professionally
Achieve Excellence
Work as a Team
Build Long
Term Relationships
Our Mission is to deliver outstanding engineering solutions that improve the world's infrastructure, bring value to our clients, and enhance people's lives
As a result of our engineering excellence and outstanding service, H&H will be the consultant of choice for all our clients in all our markets. Our accomplishments and culture will establish H&H as the most respected engineering firm and the envy of our industry