The foundation of all that we do at GTS is centered on our staff. If you need help in the service areas we provide, please contact one of our experts listed below. We are committed to providing immediate, rock-solid assistance to all our customers.

Senior Management Staff

President / Chief Executive Officer
Vijay Gupta, Ph.D., P.E.

(484) 920-8010

Executive Vice President
Brent J. Basom, P.E.

(717) 920-7040

Vice President
Joseph N. Nardella

(717) 920-7018

Vice President
Craig T. Welfer, P.E.

(717) 920-7053
  Vice President   Andrew C. Parker  
(717) 920-7021

Engineering Services
  Environmental   Andrew C. Parker  
(717) 920-7021
  Field Surveys   William J. Izzo, P.L.S.  
(484) 920-8022
  Geotechnical   Craig T. Welfer, P.E.  
(717) 920-7053
  Water Resources   Joseph N. Nardella  
(717) 920-7018
  Information Technology   Mark McPherson
(717) 920-7031

Phoenixville Office

1220 Valley Forge Road, Suite 4
Phoenixville, PA 19460
Phone: (484) 971-6895,
Fax: (484) 924-8540

Harrisburg Office

441 Friendship Road
Harrisburg, PA 17111
Phone: (717) 236-3006
Fax: (717) 233-0994

Philadelphia Office

4548 Market Street, Suite 205
Philadelphia, PA 19139
Phone: (215) 839-3327
Fax: (484) 924-8540

GTS ensures nondiscrimination and equal employment opportunity in all programs and activities in accordance with Title VI of the Civil Rights Act of 1964. If you need more information or special assistance for persons with disabilities or limited English proficiency, contact us at (717) 236-3006.

Persons with hearing-and speech-impairments can contact us by using the Pennsylania Relay Service. (TTY/TDD users, call 711). For help with translation visit Google translate.

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