Established in 1976, Duffield's headquarters is located in a historic barn and farmhouse in Pike Creek Valley outside of Wilm ... ington, DE. We have regional offices in Dover, DE; Philadelphia and Carlisle, PA; Thorofare, NJ and Bel Air, MD. Duffield practices extensively in the areas of: • Civil & Site Engineering • Geotechnical Engineering • Environmental Services • Natural Resources • Water & Wastewater Engineering • Construction Materials Testing • Electrical Engineering • Landscape Architecture • Structural Engineering • Municipal Engineering • Traffic & Transportation Engineering • Soil/Concrete/Asphalt Laboratory • Coastal/Waterfront Engineering • Solid Waste & Landfill Duffield is growing and looking to add to our team! For more info on these opportunities, please visit the About Us section of our website at www.duffnet.com. We are not your typical engineering firm. We’re a team that provides a diverse range of engineering solutions on a person-to-person level. At approximately 100 employees, our size allows us to have expertise in many disciplines, but our team also knows each other. It’s an increasingly rare trait, and something we’re proud of. Duffield provides many regular opportunities for staff to truly get acquainted outside our walls through projects that make it easier for them to communicate and collaborate across disciplines for the benefit of our clients. We find that actively staying in touch with the community, specifically through events and outreach, helps our employees to further develop these relationships and reminds us all why we entered this technical career in the first place: to make a difference in the world around us. Because of our unique culture and environment, Duffield has been recognized as a Top Work Place in Delaware in 2018! read more