Largest Area Engineering Firms
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| Recognized By: | Pittsburgh Business Times |
| Publication Date: | February 2015 |
| Number of Honorees: | 23 |
Businesses Receiving This Recognition
| Ansaldo STS USA | PA |
| Bowman Consulting | Multiple Locations |
| Bowman Consulting | Multiple Locations |
| CDM Smith | Multiple Locations |
| Civil & Environmental Consultants, Inc. | Multiple Locations |
| CJL Engineering | PA |
| CSD Engineers | Pittsburgh, PA |
| CSD Engineers | Pittsburgh, PA |
| Hatch Associates Consultants | Pittsburgh, PA |
| Hatch Associates Consultants | Pittsburgh, PA |
| HDR | Multiple Locations |
| HDR | Multiple Locations |
| Michael Baker Corp | Multiple Locations |
| Orbital Engineering Inc | Pittsburgh, PA |
| Premier Automation | Monroeville, PA |
| SAI Consulting Engineers Inc. | PA |
| SMS Siemag Inc. | PA |
| Tenovacore | Coraololis, PA |
| Tetra Tech, Inc. | Pittsburgh, PA |
| Tetra Tech, Inc. | Pittsburgh, PA |
| The Gateway Engineers Inc. | Pittsburgh, PA |
| Uhde Corporation | PA |
| Veolia Water Technologies |
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