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Steve W. Campbell, PE LEED AP
John Tomaszewski
Jason Vincik, PE LEED
Stacie C. Gado
Tom Butkovich, PE
Trisha Holland
Patrick Laster
Zane Weaver, PE
Tom Beauchemin
Billy Langdon
David Lowry
J.P. Witcher
Services
Mechanical Engineering
Electrical Engineering
Plumbing Design
Fire Protection
CAD / BIM / Navisworks
Projects
K-12 Education
Higher Education
Healthcare
Municipal / Government
Corporate
Sustainable Design
LEED / WELL/ Energy Star
About Us
Contact
Awards
Firm Profile
Current News
Our People
Steve W. Campbell, PE LEED AP
John Tomaszewski
Jason Vincik, PE LEED
Stacie C. Gado
Tom Butkovich, PE
Trisha Holland
Patrick Laster
Zane Weaver, PE
Tom Beauchemin
Billy Langdon
David Lowry
J.P. Witcher
BILLY LANGDON
CAD/ELECTRICAL DESIGN
Billy has been with PDC since 2000.
Education
North Carolina State University – Raleigh, North Carolina
blangdon@pdcengineers.com
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