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Quakertown, Pennsylvania

2405 John Fries Highway
Building 3
Quakertown, PA 18951



Office Contact

David N. Zmijewski, PE


Geotechnical Engineering

Michael W. Derr, PE

Vice President

Geotechnical Engineering

Richard Lake, LSRP

Vice President

Environmental Consulting

Robert Howard, PE

Vice President

COT Services

Partner With Us

With more than 500 engineers, geologists, scientists, technicians, and support personnel, GTA has the expertise, resources, and experience to meet your needs. Reach out to us today.