in Clarksburg

Through the engineering of biology, Intrexon is helping to address some of the world’s most pressing challenges to realize a better, healthier planet. We invite you to learn more at www.dna.com. …

AECOM designs, builds, finances and operates infrastructure assets in more than 150 countries. From high-performance buildings and infrastructure, to resilient communities and environments, to st…

Tetra Tech is a leading provider of consulting, engineering, program management, construction management and technical services worldwide.

Comsat Laboratories, a division of Viasat, is located in Germantown, Maryland.

Terracon's Consulting Engineers and Scientists specialize in environmental, facilities, geotechnical, and materials consulting & engineering services.