Contract Mining

Core Service

Comprehensive Contract Mining for Underground and Surface Operations

GMS offers full-service contract mining solutions across North America, delivering expert-led support for both underground and surface operations. We bring field-proven crews, engineering precision, and boots-on-the-ground responsiveness to every project, whether you’re developing a new site or optimizing an existing one.

With over 40 years of hands-on experience and a deep understanding of regional geologies and mining methods, GMS delivers reliable results in some of the industry’s most challenging environments. From hard-rock tunneling to high-volume surface extraction, we provide the people, equipment, and expertise to get the job done safely, efficiently, and on schedule.

Underground Mining Services Development & Production

Development and production mining
Continuous Mining
Sequential Excavation Method (SEM)
Hardrock & Softrock Applications
Raise mining and sub-level stoping
Drill and blast operations

Our underground teams excel at driving headings, achieving production targets, and managing complex excavation methods in challenging environments. From hardrock to softrock applications, we deliver precision and efficiency while maintaining the highest safety standards.

Underground Mining Services Support & Specialized Operations

Ground support and bolting
Shaft sinking and rehabilitation
Shotcrete, concrete, and ventilation installs
Muckers and scoops
Jumbo drills and bolters
Shotcrete sprayers and remixers
Pumps, haul trucks, and personnel carriers
Jackleg drills, face drills, and more

We provide comprehensive underground support services that keep operations running safely and productively. From ground control to specialized equipment operation, our crews integrate seamlessly into your team or mobilize as a full-service solution.

Surface Mining Services

Overburden removal and site prep
Production drilling and blasting
Screening, crushing, and material handling
Haulage and equipment operation
Pumps, haul trucks, and personnel carriers

Our surface mining crews bring the same level of discipline and technical oversight to above-ground operations. Whether it’s stripping, drilling, or blasting, we operate efficiently and safely — helping you meet your tonnage targets without compromising environmental or regulatory standards.

What Sets Us Apart

Why GMS Is the Trusted Partner for Contract Mining Projects

Experienced industry professionals: Every project is guided by mining, civil, and mechanical engineers with deep site experience.
Task-trained crews: Our workforce is fully trained, certified, and prepared to integrate directly into your operations.
Unmatched safety culture: We maintain one of the lowest NFDL rates in the industry through strict daily protocols and training.
Proven integrity: We build long-term partnerships through transparent communication, accountability, and consistently doing the right thing — even when no one’s watching.
Turnkey delivery: From development to blasting, concrete, and ventilation — we offer complete mining solutions under one roof.
North American reach: Active crews deployed across the U.S. and Canada, including Nevada, Pennsylvania, Ontario, and British Columbia.

What They’re Saying

I would like to express my appreciation to the GMS maintenance team. We are pleased and we commend them on their performance and professionalism. Finding and retaining trained mill wrights and process electricians has proven to be a challenge. From day one, GMS has been a positive addition to our maintenance department and has made it possible for the Nevada Copper Process Maintenance and Operations teams to start moving forward to achieve the goals we have set to operate and maintain a world class copper processing facility. Again, thank you, we are looking forward to continuing to work with the GMS team.

– Scott Lawson, Mill Processing Manager at Nevada Copper
We at Normet Americas have worked with GMS Mine Repair and Maintenance for at least 12 years. GMS has used our shotcrete equipment, grouts, concrete additives, and void fill & rock reinforcement chemicals on many underground projects over the years. Our technical specialists have worked side-by-side with GMS personnel and can attest to their knowledge of concrete, shotcrete/grout mix designs and shotcrete spraying skills (including overhead). Safety and timely delivery of projects are their priorities.

– Lauro Lacerda, PE Ground Control Manager at Normet Americas, Inc
I have been working with employees provided to me through GMS on different projects for over a year now. Most recently I have two electricians and a mining engineer on staff through GMS. The electricians are top notch I have one of the GMS electricians working as my lead electrician directing and overseeing our major power upgrade project that we are working on and could not be more pleased. And the young man that GMS provided us as a mining engineer is also fitting in and working out very well. I have been very happy with the personnel that has been sent to me through GMS. I highly recommend the use of GMS for anyone that is look for some short-term help or help getting staffed up for the long haul. Again, I have been nothing but pleased with the personnel I have obtained through GMS, and it takes a very big load off my shoulders searching for and hiring personal on my own.

– Shane Eisenbarth, Mine Manager at Tintic Consolidated Metals LLC
GMS was contracted to perform resin grouting services to address water ingress into underground openings. During a planned inspection, engineering identified a discontinuity in the rockmass which required immediate attention. After thorough evaluation, we proceeded with a polyurethane injection to stabilize the rock mass. GMS executed the work safely, efficiently, and with precision, playing a key role in securing both the area and access, ensuring the continued safety and functionality of the mine.

– Sam Renelli, Vice President, Technical Services at Foran Mining

GMS Mine Repair