Kimley-Horn and Associates, Inc.

A national engineering, planning, and environmental consulting firm specializing in transportation projects. We have a staff more than 6.700 serving a wide range of public and private clients in many disciplines from more than 95 offices nationwide-including in Pennsylvania through our rapidly-growing offices (Mechanicsburg and Philadelphia). For more than 54 years, client throughout the United States have found us to be their top source for comprehensive consulting services in engineering, planning, and environmental services, including emerging technology and ITS. We are ranked No. 10 in Transportation in the 2022 ENR Rankings.