DiGioia Gray, Inc. was founded in 2004 by Anthony M. DiGioia, Jr. PhD, PE and Richard E. Gray, PG. Both founders are now enjoying their 50th year of engineering excellence.

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Matheson

Thompson Run Road 903, 15122 West Mifflin, United States

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Tetra Tech

Penn Center Boulevard 400, 15235 Pittsburgh, United States

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Gannett Fleming, Inc.

Rugh Street 500, 15601 Greensburg, United States

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TRC Companies, Inc.

Eldo Road 2500, 15146 Monroeville, United States

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Civil & Environmental Consultants, Inc.

Triangle Lane 4000, 15632 Export, United States

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Sci-Tek Consultants, Inc.

Rodi Road 655, 15235 Pittsburgh, United States

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TRC Companies, Inc

Corporate Lane 1036, 15632 Export, United States

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