About Us

the Pennsylvania Department of Conservation and Natural Resources, and several municipalities as a prime consultant and has provided subconsultant services to over thirty national and regional consulting firms.† These services have included surveying (property, topographic, and construction), highway engineering (roadway design, right-of-way plans, drainage and stormwater management, erosion and sediment pollution control plans, highway lighting, etc.), bridge engineering (bridge design and NBIS inspections), infrastructure design (water and sewer design), traffic engineering (traffic studies, signing plans, MPT plans, and data collection), and utility coordination (designation, location, and design assistance).


About Us


Consulting Engineers


TWE President and Founder
A.R. Tasir (Tas) Wahlah, P.E.

T. W. Engineering, Incorporated (TWE) is a diversified civil engineering firm offering a wide range of services from a convenient, suburban Pittsburgh location.† TWEís staff has a wealth of experience in design and construction management.† Members of our design team have been key participants in a wide variety of transportation and infrastructure design projects ranging from the replacement of waterlines to new limited access highways, and from environmental and location studies to construction inspection and documentation.

Since its founding in 1994 by Mr. A.R. Tasir (Tas) Wahlah, P.E., TWE has steadily increased the size of its staff, broadened its client base, and successfully completed increasingly complex projects.† Our staff consists of registered professional engineers, professional land surveyors, and engineers-in-training, as well as other graduate engineers, designers, surveyors, and CADD operators.† This dedicated staff has provided services to the Pennsylvania Department of Transportation,
Pennsylvania Turnpike Commission, Pennsylvania Department of General Services,


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Ludlow T-315

NBIS Inspections

I-79 (Bridgeville)

Text Box: PA Turnpike

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