environmental engineering services in District Of Columbia

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HDR

Wisconsin Avenue 7200, 20814 Bethesda, United States

Your partner for high-performance buildings and smart infrastructure. We specialize in architecture, engineering, environmental and construction services.

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HDR, Inc (Architecture office)

Washington Boulevard 3001, 22201 Arlington, United States

Your partner for high-performance buildings and smart infrastructure. We specialize in architecture, engineering, environmental and construction services.

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HDR

M Street Southeast 100, 20003 Washington, United States

Your partner for high-performance buildings and smart infrastructure. We specialize in architecture, engineering, environmental and construction services.

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Langan

Wilson Boulevard 1300, 22209 Arlington, United States

As a premier provider of land development engineering and environmental consulting services, Langan brings more than four decades of expertise and experience to challenging projects around the wo…

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Haulsey Engineering Inc

Pennsylvania Avenue Northwest 601, 20004 Washington, United States

Since our founding in 1985, the spirit of HEI and its people has been reflected in our motto, �Leaders by Performance.� Since 1985, HEI has provided Logistics Management & Engineering, Material M…

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Michael Baker Jr., Inc

Eisenhower Avenue 3601, 22304 Alexandria, United States

Michael Baker International is a leading provider of engineering and consulting services, including design, planning, architectural, environmental, construction and program management. The Compan…