HGL is a leader in our fields, delivering exceptional service and value to our clients and communities. By cultivating a culture of innovation and excellence, we’re able to adapt and augment our services to …

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 …

“Work-life balance. The team here is really great. HGL has afforded me time to complete my graduate degree. Even with a heavy workload, I was still able to work on my degree. I work from home and it’s …

Headquartered in Reston, Virginia, HGL has regional offices across the United States to support the needs of our clients and ensure excellent customer service. Check out our full list of locations.

OUR WORK LEADERS IN THE FIELD HGL experts are addressing some of the world’s most complex challenges to restore the environment and protect our future.

A co-founder of HGL, Dr. Huyakorn has served as the company’s president and chief executive officer since 1987 and has established HGL as a nationally prominent firm, specializing in environmental …

HGL has industry-leading expertise across our organization, and we’re ready to help you plan for and execute environmental work at your site. Contact us today to start a conversation, and follow us on …

Peter Huyakorn, co-founder of HGL, is a world-renowned expert in the development and application of groundwater/surface water and contaminant transport models. He believes in investing in innovations …

Sep 29, 2025 · Under this new contract, HGL-APTIM Technologies JV LLC will provide environment-related A-E services, including restoration, conservation, planning, and quality, at facilities within and …

HGL has built its business on a foundation of integrity, ethics, hard work, and high-quality work products. We hold ourselves and our employees to the highest standards and are dedicated to getting the job …