HGL is a full-service environmental science, engineering, and construction firm (small business under NAICS 562910) with over 25 years of experience responding to environmental challenges.

As a performance-based contractor, HGL excels at:

  • Implementing cost-effective solutions
  • Deploying advanced technologies
  • Meeting milestone objectives under time critical and limited resource projects
  • Successfully interacting with regulatory authorities and stakeholders.

HGL provides environmental engineering, remediation, and construction services, as well as Military Munitions Response Program support to the Department of Defense (DoD), US Air Force (USAF), US Army Corps of Engineers (USACE), US Environmental Protection Agency (USEPA), and other federal and state government clients.

An employee-owned company established in 1987, HGL has earned a reputation of continually exceeding customer expectations. The Engineering News-Record has listed HGL as one of the top 200 environmental firms since 2001. Consistent high quality work has resulted in repeat business, and has earned HGL “Blue” ratings from the USAF, ACASS ratings of “Excellent” from the USACE, and “Outstanding” ratings from the USEPA.

HGL is in the forefront of environmental technological expertise. In addition to emphasizing in-house technology development for environmental analysis, HGL’s track record includes 20+ years as prime contractor for the DoD’s Strategic Environmental Research and Development Program (SERDP) and the Environmental Security Technology Certification Program (ESTCP), supporting the evaluation and demonstration of innovative environmental technologies that solve complex environmental problems and reduce DoD operational costs.

Headquartered in Reston, VA, HGL maintains offices in Albany, NY; Atlanta, GA; Boston, MA; Denver, CO; Hudson, OH; Huntsville, AL; Kennewick, WA; Knoxville, TN; Orlando, FL; Overland Park, KS; Philadelphia, PA; Phoenix, AZ; and San Antonio, TX.