Background

An award-winning engineering firm, Duffield Associates is a growing service provider of geoscience technology. Established in 1976, our firm includes a professional, technical and administrative staff dedicated to using their talents and experience towards accomplishing your engineering and geoscience objectives. We know what it takes to get the job done.

As a company, Duffield Associates has systematically and agressively implemented energy saving, water conservation, and sustainable practices throughout our offices and facilities. From constructing a new green building to a pioneering recycling program to geothermal climate control to adaptive reuse, our culture fosters "living green" not only with and for our clients but in our facilities.

Our Mission…

Our mission is to provide responsive, value-added geoscience solutions by developing and maintaining client relationships through exemplary service.

Learn about our Wilmington property and landmark farm buildings…

Company Sustainable Initiatives

Cumberland Geotechnical Consultants (CGC), located in Carlisle, Pennsylvania, was founded in 1990 as a full service geotechnical consulting engineering firm. The company grew to include approximately 20 engineers, scientists, technicians and support staff. The firm operated an extensive soils, concrete and geosynthetics materials testing laboratory, and owned and operated their own drill rigs. From its inception, CGC became heavily involved in solid waste landfill engineering including design, permitting and construction quality assurance services, developing a reputation for quality service and innovative solutions to landfill construction issues, along with expertise in the applications of clay liners and geosynthetics in the solid waste industry.

In September, 2007, CGC joined Duffield Associates. The resulting name of the Carlisle division became Cumberland Geoscience Consultants, a Division of Duffield Associates. CGC now offers the full range of Duffield Associates' services including Ecological Services/Permitting, Environmental Services, Water Resources & Infrastructure, and Coastal/Waterfront Engineering.