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Our Team

Team-Oriented & Client-Focused

We attract, retain, and promote a diverse blend of high achievers who strive to create value for our clients. Our people are challenged to reason objectively and think independently to solve complex client problems efficiently and practically. Our business is growth-oriented and we seek people that delight in the accountability and abundance of opportunity that accompanies growth.

Leadership

GTA would not be where it is today without the inspiring and dedicated leadership of these people:

Mid-Atlantic

David N. Zmijewski, PE

President

Quakertown, PA; Richmond, VA; Orlando, FL

Geotechnical Engineering

Stephen A. Cutter

Vice President

Frederick, MD and Sterling, VA

Subsurface Exploration and COTS

C. Randy Daub, PE

Vice President

Northeastern OH and Pittsburgh Metro Office

Geotechnical Engineering & COT

Michael W. Derr, PE

Vice President

Quakertown & Wilkes-Barre, PA

Geotechnical Engineering

Benjamin T. Dinsmore, PE

Vice President

Laurel and Waldorf, MD

Geotechnical Engineering

Robert Dykstra, PE

Vice President

NYC Metro Office

Geotechnical Engineering and COTS

David J. Garbarino

Treasurer & Chief Administrative Officer

Abingdon, MD

Finance & Administration

Paul H. Hayden, PG, LRS

Vice President

Baltimore, MD

Brownfield Redevelopment

Andrew S. Hendricks, PG, LRS

Vice President

Sterling, VA

Environmental Consulting

Robert Howard, PE

Vice President

COT Services

Richard Lake, LSRP

Vice President

Quakertown, PA

Environmental Consulting

Ravi Malviya, PE

Vice President

Laurel, MD

Geotechnical Engineering

Meghan McDonough, PE

Vice President

New Castle, DE

Geotechnical Engineering and COT

Andrew D. McKeen, PE

Vice President

Laurel, MD

Geotechnical Engineering

Benjamin G. Myers, PE

Vice President

Abingdon, MD

Environmental Consulting

Jonathan D. Raab, PE

Vice President

Pittsburgh Metro & York, PA and Northeastern OH

Geotechnical Engineering

Gary S. Rakow, LSRP

Vice President

Somerset, NJ

Environmental Engineering and Management

Janet Reid, CPA

Chief Financial Officer

Abingdon, MD

Finance

Christopher M. Reith, PE

Vice President

New Castle, DE

Geotechnical Engineering

Gregory R. Sauter, PE

Vice President

Georgetown, DE

Geotechnical Engineering

Paul Scott, PG

Vice President

Abingdon, MD

Hydrologist

Donny Sousa, CWI

Vice President

Somerset, NJ

Construction Observation & Testing

T. Andrew Stansfield, Jr.

Vice President

Abingdon, MD

Natural Resources

Samuel J. Stevenson

Vice President

Laurel, MD

Environmental Consulting

Scott J. Taylor, PE

Vice President

Laurel, MD

Geotechnical Engineering and COT Services

Thomas M. Wirth, PE

Vice President

Abingdon, MD

Geotechnical Engineering and COT

Midwest

Jonathan D. Raab, PE

Vice President

Pittsburgh Metro & York, PA and Northeastern OH

Geotechnical Engineering

C. Randy Daub, PE

Vice President

Northeastern OH and Pittsburgh Metro Office

Geotechnical Engineering & COT

Southeast

David N. Zmijewski, PE

President

Quakertown, PA; Richmond, VA; Orlando, FL

Geotechnical Engineering

Eric B. Church, PE

Vice President

Richmond, VA

Geotechnical Engineering and CMT

Stephen A. Cutter

Vice President

Frederick, MD and Sterling, VA

Subsurface Exploration and COTS

Sarah E. Dalton, PE

Vice President

Sterling, VA

Geotechnical and COTS

Andrew S. Hendricks, PG, LRS

Vice President

Sterling, VA

Environmental Consulting

John P. Moscati

Vice President

Charlotte, NC

Geotechnical and COTS

Gautham Pillappa, PE

Vice President

Orlando, FL

Geotechnical Engineering and CMT

Amin Rahman, PE

Vice President

Sterling, VA

Geotechnical Engineering

W. Shawn Sullivan, PE

Vice President

Raleigh, NC

Geotechnical and COTS

Daniel D. Terranova, PE

Vice President

Nashville, TN

Geotechnical and COT

John P. Wille, PE

Vice President

Greenville, SC; Charlotte, NC

Geotechnical and COTS

Join Our Team!

If you want to start a fulfilling career at a people-focused firm where you can be proud of the work you produce, then we would love to hear from you.

Apply Now