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Subcontractor

Soil Nail Launcher installing nails on a roadside slope.

Your Partner for Complex Projects

GeoStabilization International is the leading geohazard mitigation subcontractor in North America, providing specialized stabilization services that support general contractors, engineering firms, and asset owners. From landslides and rockfalls to sinkholes and embankment failures, we deliver quick, engineered solutions that protect critical infrastructure and keep projects on schedule.

With deep geotechnical expertise, proprietary technologies, and nationwide reach, GSI serves as the trusted partner for design-build and emergency stabilization projects across transportation, energy, utility, and industrial sectors.

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Why Choose GSI as Your Subcontractor

Full geotechnical design, analysis, and construction capabilities under one roof.

Rapid deployment of crews, equipment, and materials across North America.

Custom rigs and rope-access systems for steep, remote, or restricted terrain.

Field-tested solutions for landslides, unstable slopes, foundations, and rockfalls.

Seamless integration with general contractors, consultants, and public agencies.

A strong safety record backed by environmentally responsible field practices.

Subcontracted Services We Provide

 

Slope Stabilization & Landslide Repair

Permanent repairs using soil nails, rock bolts, and shotcrete systems to stabilize active or potential slope failures.

Rockfall Protection & Mitigation

Installation of barriers, drapery, attenuators, and slope trimming to reduce rockfall hazards near roads, railways, and facilities.

Retaining Wall Systems

Design and installation of soil nail, MSE, and shotcrete wall systems for infrastructure and site development.

Sinkhole & Void Remediation

Ground improvement and compaction or permeation grouting to restore subsurface stability.

Micropile & Foundation Support

Structural underpinning and micropile foundations for towers, substations, and variable soil conditions.

Erosion & Water Control

Riprap, gabion, and drainage improvements to protect embankments, culverts, and slopes from water damage.

Launcher in river
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855.579.0536

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Spider Excavator

Trusted Partner for General Contractors & Agencies

We frequently collaborate with:

  • General Contractors seeking specialized subcontractors for infrastructure or site stabilization.
  • Departments of Transportation and Municipalities requiring emergency slope or roadway repairs.
  • Railroads and Utilities managing critical corridor access and safety.
  • Mining and Industrial Operators with ongoing geotechnical risk exposure.
  • Engineering Consultants needing design-build execution partners for complex terrain or geologic challenges.

Our subcontracting services have been proven on thousands of projects across the U.S. and Canada, delivering safe, efficient, and lasting stabilization solutions.

The GSI Advantage

Speed

Quick response and rapid mobilization anywhere in North America.

Certainty

Clear communication and dependable scheduling to support general contractors’ workflows.

Innovation

Proprietary tools and systems that reduce disruption and improve performance.

Safety

An industry-leading safety record supported by comprehensive training and procedures.

Collaboration

Proven experience working seamlessly within multi-contractor and agency environments.

Client Reviews

Foundation Grouting and Structural Repair for Homeowner

I wanted to drop you a quick note. Late last year I had Tom Szynakiewicz come by and advise me as to what I needed to do to fix my house structure. Tom and GSI were great to work with to find a solution for my structure issues. GSI did an excellent job for us and got us on the right track with the work that was performed. We just sold the home last week, and disclosed the work that was done. We had zero issues with selling the home because it was fixed by GSI. I am very thankful I called and got you guys involved! Thanks again for steering me in the right direction Wayne!

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When your project demands specialized geotechnical support, GeoStabilization International delivers engineered certainty under pressure. Our experts are ready to provide quick, professional subcontractor services that integrate seamlessly into your team and project goals.

Request a site assessment or proposal today.

855.579.0536

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    Our Awards, Certifications, & Memberships

    ADSC Safety Award
    GeoHazard Professionals Safety Recognition
    Gold Shovel Standard Certified
    GSI is a Directing Member of the Association of Geohazard Professionals