About HGL

Restoring the Environment.
Protecting Our Future.


HGL understands the value of the Earth’s natural resources. For the past 37 years, our mission to protect the environment and our local communities has driven us to develop innovative, effective, and sustainable engineering and remediation solutions to reverse harmful impacts to the environment, restore our natural resources, and protect our future.

As an employee-owned company, HGL inspires our colleagues and communities to join us as good stewards—excelling at work and at home. We invest in hiring and retaining the best people and are committed to spending the time and providing the motivation and support needed to make a difference. HGL has earned a reputation for continually exceeding customer expectations by providing the best services and products safely, on schedule, and within budget. Our consistent, high-quality work has resulted in repeat business and has earned HGL evaluation ratings of “Exceptional” from U.S. Government customers. The Engineering News-Record has listed HGL as one of the top 200 environmental firms since 2001.

HGL is a leader in each of our fields of expertise. We deliver exceptional environmental engineering, remediation, and construction services, as well as Military Munitions Response Program support, to the U.S. Department of Defense, U.S. Air Force, U.S. Army Corps of Engineers,

U.S. Environmental Protection Agency, U.S. Department of Energy, Defense Logistics Agency, National Aeronautics and Space Administration, and other federal and state government clients. We continually adapt our service offerings and add new ones to address the latest challenges such as those posed by climate change and emerging contaminants like PFAS.

Headquartered in Reston, Virginia, HGL maintains regional offices in Atlanta, Georgia; Ballston Lake, New York; Billings, Montana; Gloucester, New Jersey; Huntsville, Alabama; Kamuela, Hawaii; Lakewood, Colorado; Merritt Island, Florida; Overland Park, Kansas; Phoenix, Arizona; San Antonio, Texas; and St. Louis, Missouri.

Contact us today to learn how we can work together to restore the environment and protect our future.


HGL’s co-founder, Dr. Huyakorn has served as president and CEO since 1987. Read the latest from this world-renowned expert in the development and application of groundwater/surface water and contaminant transport models. Learn More