About
From the Ground Down, We Build with Purpose
With over 40 years of experience beneath Canada’s surface, Marathon Underground Constructors Corporation is a privately owned, Canadian-owned company delivering the deep expertise, precision, and reliability that complex infrastructure demands.
Specialised. Trusted.
Canada-Wide.
Marathon Underground is one of Canada’s leading speciality underground contractors—privately owned, Canadian-owned, and built on decades of grit, innovation, and hands-on experience.
What began over 40 years ago with two drilling rigs in Ottawa has grown into a national force in trenchless construction, deep foundations, shoring, and geotechnical drilling. Along the way, we’ve earned the trust of municipalities, developers, and utility providers by doing what we say we’ll do—safely, efficiently, and with precision.
Built on Partnerships. Driven by Results.
At Marathon Underground, we believe collaboration leads to better outcomes. Our in-house engineering team works closely with project owners, designers, and contractors to uncover smarter, safer, and more cost-effective solutions—before work even begins.
From rock tunnelling in rugged terrain to pipe ramming under active highways, we thrive in technically challenging environments. With a specialised fleet and over 200 skilled team members, we’re ready to mobilise across Canada.
What We Do—Beneath the Surface
This illustration captures the scale and complexity of Marathon Underground’s capabilities across Canada.
From trenchless drilling and microtunnelling to deep foundations, shaft construction, shoring, and large-diameter pipe installation, every layer shown in this image represents a service we proudly deliver in-house. Our teams work in some of the most geotechnically and geographically challenging environments, often beneath roads, railways, and urban infrastructure.
Whether it’s boring through solid rock, ramming steel casings under highways, or engineering secure shoring systems beside active infrastructure, we bring together expert craft, specialized equipment, and practical engineering solutions to get the job done right.
At Marathon Underground, we don’t just work underground—we engineer solutions that move infrastructure forward.
Safety First
We will not compromise on safety. Our people-first approach means comprehensive training, strict safety protocols, and a culture where looking out for each other is part of the daily job.
Careers That Go Further
Looking for a place to grow your skills with a privately owned Canadian company that values hard work, safety, and teamwork? We offer competitive wages, full benefits, and the opportunity to work on some of the most dynamic infrastructure projects in the country.
