About ADS

Allegheny Design Services (ADS), established in 2002, specializes in many different areas of Structural engineering. We provide reliable, responsible services of building system design and analysis.

We are the link between owners, architects, and contractors. We help the architect realize their vision while providing simple, buildable solutions to the contractor. We pride ourselves in offering timely solutions to complicated engineering issues.

ADS utilizes state of the art software including BIM (Building Information Modeling)AutoCADAutoDesk Revit Structure,  Speclink and RAM Structural System.

Over 80% of our clients are repeat customers.


David R. Simpson, P.E., MBA
President/Principal Engineer

Jason D. Robinson, PE
Vice President/Managing Principal

Brady R. Hillegas, EIT
Jr. Structural Engineer

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Jason Conrad
Engineering Technician

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Suzy Johnson
Administrative Assistant

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Robin Basnett
Office Manager

Daniel T. Leslie, P.E.
Associate Engineer