• Photo of Bartram's Mile

    Environmental Services

    Bartram’s Mile

  • Photo of New Castle Dock

    Marine Services

    New Castle Dock

  • Photo of the Incyte Building

    Multi-Disciplined Services


  • Photo of Museum of the American Revolution

    Construction Phase Services

    Museum of the American Revolution

  • Photo of Millsboro Tank Raising

    Water/Wastewater Engineering

    Millsboro Tank Raising

  • Photo of Rock and Foundation of Incyte Build

    Geotechnical Engineering


  • Civil Engineering

    Delaware Logistics


Welcome to Duffield Civil Engineering: We are specialists in civil and environmental engineering projects

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.


1708, 2021

Duffield Welcomes Matt Spong, RLA, ASLA and Trisha Sawicki, ASLA

August 17th, 2021|

The NECS platform of companies is excited to announce the addition of Matthew Spong, RLA, ASLA and Trisha Sawicki, ASLA to its growing Landscape Architecture Practice. Matt has over 40 years of experience practicing in Delaware and Maryland and has been responsible for the completion of approximately 1,600 projects focusing [...]

Enhancing our community one project at a time. Small enough to collaborate. Large enough to be technically diverse. Diverse thinking and collaboration leverage value.
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