Markets
GSI’s customers operate in a wide range of
industries, all with unique needs and
requirements.
Since 1986, GSI has partnered with clients to solve environmental challenges that shape projects, industries, and communities. What began as a two-person company 40 years ago has grown into a multidisciplinary firm united by rigorous science, thoughtful collaboration, and a drive to solve problems that truly matter.
This anniversary milestone belongs to the people who made it possible. Thank you to our clients, employees, and partners who have shaped GSI over the past four decades through trust, expertise, and shared commitment. Throughout 2026, we’re celebrating the work, the relationships, and the impact that defines our work. And as we look forward, we remain committed to delivering sound science, practical insight, and solutions designed to stand the test of time.
Thank you for being part of our story. The next chapter begins with the same purpose that started it all: making science count.
Follow our journey on LinkedIn!
GSI’s customers operate in a wide range of
industries, all with unique needs and
requirements.
We are pleased to share that Hiroko Hort, David Adamson, and Charles...
TRRP Training: 2022 Program presented by: GSI Environmetal Inc. sponsored by: Texas...
We are pleased to share that Hiroko Hort, David Adamson, and Charles...
The latest updated version of USG-Transport is available here:
The original version of MODFLOW-USG is available from the USGS website.
GSI is an employee focused, growing company with
superior compensation, benefits, professional
development, and potential for advancement.
