Trusted Since 1980
Mining Solutions. Driving Results.
GMS is a premier mining and tunneling contractor with over 40 years of experience delivering full-service underground and surface solutions across North America. Headquartered in Oakland, Maryland, GMS is known for contract mining, engineering support, top-tier products, and a strong commitment to safety.
From development and production to ground control, ventilation, and custom fabrication, GMS takes a collaborative, turnkey approach that adds value at every stage. Its boots-on-the-ground workforce combines field-tested experience with an engineering-driven mindset to protect workers, improve productivity, and power progress.
Our Active Footprint
GMS crews and equipment operate across the U.S. and Canada, supporting mining and tunneling projects in diverse regions and geologies. The company's active footprint spans hard rock, coal, salt, and industrial minerals with safety-driven teams ready to mobilize where work demands it.
Our Mission
GMS advances the mining industry with safe, innovative, and reliable solutions guided by integrity and rooted in family, delivering lasting value for clients and growth for its people.
Our Values
Safety, integrity, reliability, and innovation shape every project. GMS invests in people, embraces improvement, and holds itself accountable to high standards of professionalism.
What Sets Us Apart
Engineer-Led Operations
Technical teams guide projects from design through execution to improve precision, efficiency, and quality control.
Unmatched Safety Standards
Daily risk assessment, ongoing hands-on training, and accountability at every level shape a strong safety culture.
Strong Partnerships
GMS works closely with clients to solve challenges proactively and deliver consistent results through transparent communication.
Experienced Workforce
Miners, engineers, electricians, mechanics, and field leaders bring real-world experience to demanding mining and tunneling environments.
Turnkey Capabilities
Engineering, fabrication, installation, labor, and support services are coordinated under one team to reduce downtime and simplify delivery.
Proven Presence
Mining Crews Deployed Throughout North America
With 16 regional offices strategically positioned across North America, GMS provides contracting services tailored to the unique requirements of each operation. Capabilities cover contract mining, shaft and slope construction, ventilation and material handling systems, and complete site infrastructure builds.
Every project is approached with operational excellence, aligning technical expertise with practical field execution and long-term client partnerships.
Our Affiliates
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