TESC Contracting Company Ltd.
Website verified August 2026
Key takeaways
- Category: Fixed Plant & Hoisting, Maintenance & Shutdowns, Processing Plants & Tech
- Based in: Sudbury Ontario, Ottawa Ontario, Thunder Bay Ontario and 1 more location
- Serves: Canada
- Operating: 1976
TESC is a family-founded and family-owned integrated construction services contractor that has operated for nearly 50 years. The company was founded in 1976 by Tom Lachance and Stan Huchenski, who completed their first project at Denison Mines in Elliot Lake near Sudbury, Ontario. Following Stan’s death in 1985, Tom continued building the business, which expanded with satellite offices in Ottawa and Thunder Bay during the 1980s. During the 1990s recession, TESC grew into one of the most esteemed contractors serving the mining industry. In 2000, ownership transferred to Dario Zulich, son-in-law of original founder Tom Lachance. That same year, TESC became ISO quality certified. A satellite office opened in Saskatoon to serve the growing industrial market. By the 2010s, TESC had established itself as a multi-trade construction services provider with expertise beyond mining and shutdown services, working across mining and metals, energy and power generation, and forest products sectors for industrial, commercial, and institutional clients. In 2020, Julie Zulich, daughter of founder Tom Lachance, became president and CEO, steering the company through the global pandemic and creating an advisory board of industry leaders while investing in professional development and retention programs. Sudbury became the head office for all national operations.
TESC delivers integrated construction services through general contracting, pre-construction services, shutdowns and maintenance, design-build, integrated project delivery, and construction management. The company has a team of certified trade experts in civil, structural, electrical, mechanical, piping, fabrication, and engineered scaffolding. TESC routinely mobilizes large multi-trade workforces for maintenance, rehabilitation, repairs, shutdowns and turnarounds and states it has never missed a critical shutdown completion date. The company offers 24/7 emergency services and operates across North America, with capability to self-perform work and build experienced teams as needed. TESC is family-owned and operates as a people-first company, with employees empowered to be challenged, successful, and proud of their contribution.
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Company details
- Projects and clients
- Denison Mines Elliot Lake (1976), Northgate Minerals Young Davidson Mine Headframe Construction Matachewan Ontario (September 2013), BHP Billiton Jansen Mine Hoist House Buildings Leroy Saskatchewan (July 2012), Mosaic K3 Mine Service Shaft Headframe Construction Esterhazy Saskatchewan (June 2014), Barrick Hemlo Cyanide Detox Plant and Tailings Flotation Complex, Glencore Onaping Depth Project Headworks Steel Installation, CKPI Installation of Chip Thickness Screening System, Domtar Power Recovery Boiler Chemical Treatment, Domtar HD Tower Piping, Coniston Generating Station 22kV-44kV Conversion, Mistinikon Lake Replacement of Spillway Guardrails and Flashboards, McVittie Generating Station Roof Replacement, Detour Gold Corporation Detour Lake Mine 13.8kV Substation Installation, Detour Gold Corporation Detour Lake Mine Concrete Slabs, Northgate Minerals Young Davidson Mine Substation Installation, BHP Billiton Jansen Mine Freeze Plant Supply Installation, Vale No.8 Converter Installation Sudbury, Vale No.10 Converter Installation, Vale Matte Sep SMPEI Phase 1, Vale Matte Sep SMPEI Phase 2, Harte Gold Sugar Zone Mill Installation, Tahoe Bell Creek Shaft Sinking Project Sudbury, Sudbury Lime Plant Electrical Services Installation, Glencore Concentrate Unloading, Vale INO Process Gas Project Phase I
- Scale
- Nearly 50 years in operation, in-house engineering capability, large multi-trade workforce mobilization capability
- Also worth knowing
- Family-founded and family-owned business now in third generation of leadership. Founded at Denison Mines in Elliot Lake in 1976. Became ISO quality certified in 2000 which was not standard at the time. States it has never missed a critical shutdown completion date. Mosaic K3 Mine Service Shaft Headframe completed at 374 feet standing as one of the world's tallest mining headframes. Founded in Sudbury, Ontario, the city of its founders.
Details prepared by MineListings. TESC Contracting Company Ltd. can update them by upgrading to Premium.
Where is TESC Contracting Company Ltd. listed in the directory?
Fixed Plant & Hoisting 16 companies Maintenance & Shutdowns 148 companies Processing Plants & Tech 123 companiesFrequently asked questions
What does TESC Contracting Company Ltd. supply?
Civil, Structural, Electrical, Engineered Scaffolding, Fabrication, Mechanical, Piping, Pre Construction Services, General Contracting, Shutdowns, Maintenance, and Turnarounds, Design-Build, Integrated Project Delivery, Construction Management, 24/7 Emergency Services
Where is TESC Contracting Company Ltd. based?
Sudbury Ontario, Ottawa Ontario, Thunder Bay Ontario, Saskatoon Saskatchewan
Which industries does TESC Contracting Company Ltd. work in?
Mining and Metals, Power Generation, Forestry and Agriculture
How long has TESC Contracting Company Ltd. been operating?
1976
What certifications does TESC Contracting Company Ltd. hold?
ISO quality certified (2000)
How do I contact TESC Contracting Company Ltd.?
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