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GSI Environmental Inc. Tech Stack

Environmental engineering consulting for remediation, permitting, and site assessment

Environmental Services Houston, Texas 201–500 employees Founded 1986 Privately Held

GSI Environmental is a consulting firm built around specialized environmental engineering disciplines—groundwater services, permitting across air/water/stormwater, toxicology, and emerging contaminants like PFAS and microplastics. The tech stack is analysis-heavy: ArcGIS, MODFLOW, Python, R, MATLAB, and PostgreSQL, with no major tool adoptions or replacements visible, suggesting a stable, domain-focused operation. Active hiring skews toward engineering roles (primarily mid and senior), indicating growth in delivery capacity rather than organizational restructuring.

Tech Stack 15 technologies

Core StackArcGIS PostgreSQL Python MATLAB ArcGIS Desktop ArcGIS Pro Google Earth Excel Microsoft Access MODFLOW R Microsoft Office Windows Microsoft 365 Deltek Ajera

What GSI Environmental Inc. Is Building

◆Challenges

Stormwater compliance
Reducing pollutants in stormwater discharges
Environmental due diligence
Managing complex environmental projects
Growth in california practice
Visualizing complex environmental data
Producing detailed technical drawings
Expanding stormwater practice
Budget tracking
Subcontractor oversight

▲Active Projects

Remediation
Site cleanup assessment program
Site characterization
Environmental assessment
Environmental due diligence
Remedial investigations
Natural resource development litigation support
Conveyance infrastructure
Stormwater quality treatment r&d
Stormwater npdes projects

Hiring Activity

Decelerating35 roles · 7 in 30d

Department

Engineering

31

Finance

2

Marketing

1

Ops

1

Support

1

Seniority

Mid

14

Senior

11

Junior

8

Principal

2

Lead

1

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About GSI Environmental Inc.

GSI Environmental is a privately held environmental engineering and consulting firm headquartered in Houston, Texas, with 201–500 employees. The firm serves industrial operations, real estate development, and regulatory clients across groundwater remediation, site characterization, environmental permitting (air, water, stormwater), and litigation support. Recent project focus spans remedial investigations, environmental due diligence, stormwater compliance and treatment research, and natural resource development litigation. The firm combines field assessment work with technical analysis, using specialized modeling and GIS tools to solve site-specific environmental problems.

HeadquartersHouston, Texas

Company Size201–500 employees

Founded1986

Hiring MarketsUnited States

Frequently Asked Questions

What is GSI Environmental's tech stack?

GIS-centric: ArcGIS (Desktop and Pro), Google Earth for visualization; modeling and analysis via MODFLOW, Python, R, MATLAB; data managed in PostgreSQL and Microsoft Access; Deltek Ajera for project accounting.

What does GSI Environmental specialize in?

Groundwater services, remediation and site assessment, environmental permitting (air, water, stormwater), PFAS and microplastics analysis, vapor intrusion investigation, and natural resource litigation support.