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Geo-Logic

Geo-Logic Associates delivers practical, science-driven solutions that create lasting value.

Technical Excellence Across Many Disciplines

Geo-Logic Associates brings together nearly 500 engineers, geologists, hydrogeologists, stormwater specialists, and field and laboratory professionals. We collaborate with clients to solve complex environmental, civil, and geotechnical challenges with practical, science-driven solutions.

Strategic Growth

Our strategic expansion reflects a focused acquisition approach, partnering with like-minded individuals and consulting firms whose technical excellence, client dedication, and culture align naturally with ours.

1991

Year Founded

1

Team

34

Offices

200

ENR Top Environmental Firm

Expertise

Services

Environmental ›› Hydrogeology / Hydrology ›› Civil Engineering ›› Geology ›› Construction Support ›› Geotechnical Engineering ›› Heap Leach Injection ›› Soil Laboratory ››

Markets

Solid Waste ›› Mining ›› Environmental ›› Water ›› Infrastructure ›› Expert Services ›› Carbon Management ››

Featured Services

Specialized expertise for complex environmental, water, mining, waste, and infrastructure challenges.

Heap leach injection/enhanced metal recovery (EMR)
Evapotranspiration (ET) landfill cover design
Relative brine capacity (RBC) testing for lithium extraction
UAV 3D mapping and aerial reconnaissance

Leaders

Brand Leader

Geo-Logic CEO, COO

Gary Lass, PG, CEG, CHG ›› Chief Executive Officer / Chief Operating Officer 909-626-2282 ›› email ››

Leadership

CEO/COO

Gary Lass ››

President

Nicole Sweetland ››

CFO

Wendy Figueroa ››

Management

Human Resources

Maria Robles ››

Director of Marketing

Tracy Chiado ››

Health and Safety Officer

Russell Granfors ››

Services

Environmental Services

John J. Dodge ››

Hydrogeology / Hydrology

Neil Blandford ››

Civil Engineering

David Harich ››

Geology

William McCormick ››

Construction Support

Thomas Runyan ››

Geotechnical Engineering

Neven Matasovic ››

Heap Leach Injection

Stephen Morrow ››

Soil Laboratory

John Hower ››

Markets

Solid Waste

Doug Junk ››

Mining

Robert Valceschini ››

Environmental

Tom Golden ››

Water

Geno Mammini ››

Infrastructure

Jennifer Hill ››

Expert Services

Gregory Schnaar ››

Carbon Management

Olivia Brown ››

Featured Projects

1

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3

New Mexico

New Mexico Class VI UIC Permitting Primacy Application

GLA is supporting the New Mexico Energy, Minerals and Natural Resources Department in the process of applying for regulatory primacy under the EPA Class VI program in order to oversee carbon capture and storage (CCS) projects.

Rancho Palos Verdes, CA

Portuguese Bend (Altamira) Landslide Mitigation

GLA's solution called for installation of artesian-pressure-relieving directionally drilled wells significantly decreased artesian pressure and reduced landsliding

Tucson, AZ

Tucson Airport Remediation Superfund Site

In 1994, Tucson Water began operating a groundwater remediation system known as the Tucson Airport Remediation Project (TARP). To date, the TARP system has treated approximately 48 billion gallons of groundwater and removed approximately 5,303 pounds of TCE from the regional aquifer. TARP is also addressing other contaminants of concern in the soil and groundwater, including 1,4-Dioxane and PFAS.

All Projects

Featured News

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3

GLA Shines in ENR’s Top 500 Design Firms List

GLA is proud to ranks among the Engineering News-Record Top 500 Design Firms, thanks to our outstanding engineering services provided both nationally and internationally.

2026 Global Waste Management Symposium

GLA is heading to the 2026 Global Waste Management Symposium.

Geo-Logic Associates Exhibiting at SME MINEXCHANGE 2026

GLA will be exhibiting at SME MINEXCHANGE, one of the mining industry’s premier events.

All News

Featured Open Positions

Locations