1380 Wilmington Pike, Ste 100
West Chester PA 19382 
        FAX Telephone +1 (610) 696-7771 +1 (610) 696-6066

DFI Corporate Representatives:
Allen Cadden P.E., D.GE, F.ASCE Dir of Geotech Eng +1 (610) 696-6066

Individual Corporate Members:
George Aristorenas P.E., Ph.D. Principal +1 (703) 779-0773
Mohammad Nasim Ph.D., P.E. Vice President +1 (301) 417-2400
Walter J. Rabe Jr. P.E. Principal +1 (703) 779-0773
James J. Seli P.E. Principal +1 (804) 649-7035
Jeffrey Sewell Associate +1 (410) 944-6170
Johanna Simon P.E. Project Engineer +1 (610) 696-6066
George E. Wirth Principal +1 (410) 944-6170
Matthew Goff P.E. Project Engineer +1 (610) 696-6066

Services, Materials and/or Equipment offered:
Geotechnical/Geostructural Engineering Services for Designers, Contractors and Owners. We provide a full range of services from site identification through detailed design recommendations, complete plans and specifications, construction drawings, and resident engineering services, providing continuity from design through construction. Some specialty areas of our services include Deep Excavations, Tunneling, Embankment and Rock Slope Stability, Dams, Geophysical and Vibration Services, Geoenvironmental, and Construction Resident Engineering/Monitoring. We further provide Risk Assessment and Management services and integrated instrumentation monitoring.