GSI Environmental Inc.
Houston, TX Doing business as GSI Environmental Inc.
- UEI
- J8M1UGKAFL69
- CAGE
- 0X4P1
- Primary NAICS
- 541620 Environmental Consulting Services
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
- SAM.gov registration date
- Physical address
- 2211 Norfolk St #1000, Houston, TX 77098, USA
- Website
- gsienv.com
- Founded
- 1986
- Employees
- 51-250
- Estimated annual revenue
- $10M-$50M
- Industry
-
- Industrials
- Commercial & Professional Services
- Professional Services
- Consulting
- SIC code
- 89 Services, Not Elsewhere Classified
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Advanced pfas removal from impacted water streams using colloidal gas aphrons - project summary/abstract (resubmission -… | National Institute of Environmental Health Sciences | $180,843 | |
| Frameworks for assessing the impact of extreme weather events at environmental restoration sites | Naval Facilities Engineering Command | $100,000 | |
| Sbir phase 1 - sage: a system for AI-guided environmental review | Air Force Test Center | $139,972 | |
| Analytical services for CSS | Smithsonian Institution | $46,200 | |
| Estcp project EW25-8539 "convection-based geothermal heat exchange for high-efficiency building heating and cooling."… | Humphreys Engineer Center Support Activity | $1,220,318 |
About GSI Environmental Inc.
GSI Environmental Inc. is a for-profit environmental engineering and consulting firm headquartered in Houston, Texas, specializing in complex environmental remediation, research, and technology development services. Registered in SAM.gov since 2001, the company is structured as a Subchapter S Corporation that provides innovative environmental solutions primarily to federal government agencies, with a strong focus on addressing environmental challenges related to contaminants, particularly per- and polyfluoroalkyl substances (PFAS). The firm has established itself as a key contractor for the Department of Defense's environmental technology demonstration and research programs, including the Environmental Security Technology Certification Program (ESTCP) and Strategic Environmental Research and Development Program (SERDP).
GSI Environmental Inc. has secured numerous federal contract awards focusing on developing and demonstrating advanced environmental remediation technologies, with a predominant emphasis on PFAS contamination management. The company's contract portfolio includes cost-plus-fixed-fee and firm-fixed-price contracts from agencies such as the U.S. Army Corps of Engineers, Naval Facilities Engineering Command, Air Force Civil Engineer Center, and Office of Naval Research. Their projects range from developing innovative modeling platforms for assessing environmental impacts, demonstrating novel technologies for destroying PFAS in waste streams, creating high-resolution site characterization methodologies, and conducting comprehensive environmental assessments. These contracts consistently involve cutting-edge research into remediation techniques for groundwater contamination, soil treatment, and emerging environmental challenges. GSI Environmental Inc. has worked both as a prime contractor and collaborated with subcontractors like Research Triangle Institute, Geosyntec Jacobs, Ch2M Hill, and the University of Texas at Austin, with most contracts awarded through full and open competition without specific set-aside designations.
Contract vehicles
SBA capabilities narrative
GSI Environmental Inc. (GSI) is an environmental engineering consulting firm with over 32 years of experience specializing in environmental strategic planning; data management and analysis; and software development and numerical groundwater modeling for water agencies, districts, industry (oil and gas, chemical, manufacturing), government agencies, research and development organizations, utilities, trade organizations, and law firms. From our offices in Texas and California, our more than 90 employees have worked worldwide, providing innovative solutions to soil, groundwater and surface water management and contamination problems and associated regulatory issues. We emphasize careful data collection and analysis and technical ingenuity in all our work to provide solutions that are both efficient and effective.
Quick answers
What is GSI Environmental Inc.'s UEI?
GSI Environmental Inc.'s Unique Entity ID (UEI) in SAM.gov is J8M1UGKAFL69.
What is GSI Environmental Inc.'s CAGE code?
GSI Environmental Inc.'s CAGE code is 0X4P1.
What is GSI Environmental Inc.'s primary NAICS code?
GSI Environmental Inc.'s primary NAICS code is 541620 (Environmental Consulting Services).
Where is GSI Environmental Inc. located?
GSI Environmental Inc.'s physical address in SAM.gov is 2211 Norfolk St #1000, Houston, TX 77098, USA.
Is GSI Environmental Inc. registered in SAM.gov?
Yes. GSI Environmental Inc.'s SAM.gov registration is active through January 21, 2027.
Which contract vehicles does GSI Environmental Inc. hold?
GSI Environmental Inc. holds a place on 2 federal contract vehicles, including MAS and PSS.
What is GSI Environmental Inc.'s most recent federal award?
GSI Environmental Inc.'s most recent federal grant award is Advanced pfas removal from impacted water streams using colloidal gas aphrons - project summary/abstract (resubmission -… (R43ES037583), from National Institute of Environmental Health Sciences, on August 1, 2026.
On GovTribe
See GSI Environmental Inc.'s full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Federal grant awards
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
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