Today’s landscape and structural engineering projects are complex and, in addition to civil and environmental engineering, our services include architecture engineering, geotechnical engineering, wastewater engineering, and materials testing. We are past the days where one person can do it all. Various specialties need to be utilized in order to get you across the finish line. Duffield is a civil engineering company serving PA, MD, NJ, & DE. We are large enough to provide all of these diverse services, yet small enough to know each other personally which helps us to easily and routinely collaborate across our disciplines to resolve your project’s civil engineering, environmental, and science needs.