Company History

Headquartered in Littleton, Co., Summit Engineering Group is a structural engineering firm, specializing in bridges. An authority in bridge design and construction, our expert engineering staff provides services for public agencies, design consultants and contractors, including segmental concrete bridge design and construction engineering, design build engineering, spliced concrete girder design, and erection and demolition engineering. We excel in providing streamlined design and construction solutions to best meet client needs.

Now with the combined engineering prowess of Modjeski and Masters, one of the world’s leading bridge engineering firms, we can better serve our clients and strengthen the nation’s infrastructure. Established more than 120 years ago, Modjeski and Masters is responsible for the design and maintenance of some of our nation’s most recognizable structures. Services include fixed and movable bridge design, inspection and rehabilitation and all facets of lifecycle maintenance, research and code development. To learn more, visit

Concrete Girder of Ramp A located in

Mid-Hudson Bridge - Poughkeepsie, NY