Geotechnical Engineering

Honoring the spirit of the great Karl Terzahgi. Geotechnical engineering is a relatively new field, only formalized into a discrete engineering discipline over the last 80 years. The Duffield geotechnical engineering firm, serving PA, MD, NJ, & DE, is proud to be part of that evolution with the first large scale geosynthetic installations in the USA; involving innovative reuse of materials, challenging foundation designs, earthworks, and soil/structure work.

MEET OUR EXPERTS

Photo of Stacy Ziegler
Stacy Ziegler, P.E., LEED AP BD+C
Photo of Guy Marcozzi
Guy Marcozzi, P.E., LEED AP BD+C Fellow ASCE

Hank Stack, P.E.
Photo of Brian Devine
Brian Devine, P.E.
Photo of Jim Cloonan
Jim Cloonan, P.E., LEED AP

Notable Projects