Sectors of activity

From design to execution

Areas of expertise

Thornhill Capital is a group of companies that combines a broad and solid range of expertise across the fields required to deliver comprehensive solutions that meet our clients’ most complex requirements, from design to execution:

01
Energy efficiency, simulation, certification, energy optimization and decarbonization of buildings and infrastructure.
02
General contracting, infrastructure, formwork and concrete structures, horizontal/directional drilling, directional boring, steel casing percussion jacking and other trenchless techniques, project management, construction and installation of treatment equipment for the municipal and industrial sectors.
03
Construction and installation of sustainable solutions for interception, pumping, biological and physico-chemical treatment, and membrane systems for water treatment, plus the implementation of solutions for biomethanization plants.
04
Industrial construction, installation, maintenance and repair of components in boilermaking, installation of steel structures, industrial piping, and management of site mechanics and materials handling, including the development of lifting plans for heavy-equipment handling.

Our holdings

Current portfolio

Protection-plan management

The Canadian leader in protection-plan management

Services Comerco inc. provides protection plans and extended-warranty contracts across a wide range of products offered by retailers and manufacturers. Comerco stands apart through its ability to adapt to market demands and consistently exceed the expectations of its customers and business partners.

To diversify its offering, Comerco also provides a full range of cleaning and maintenance products that combine effectiveness with environmental responsibility, with a mission to create, innovate and perfect its products and services.

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Infrastructure · Water treatment · Industrial mechanics

Construction projects that meet the strictest standards

With more than 80 years of experience, ALLEN enjoys a solid reputation as a general construction company, primarily in civil engineering, construction engineering, drilling and mechanical processes.

Recognized for our professionalism and capacity for innovation, we have become a leader in infrastructure work, concrete formwork and structures, horizontal and directional drilling, and the construction and installation of processing equipment for the municipal and industrial sectors.

ALLEN ↗NELLA ↗CWA ↗

Industrial construction

A leader in industrial construction

Mécanique CNC specializes in boilermaking, on-site mechanics, steel structures and piping. The company owns its own exchanger pullers and is an expert in lifting plans for heavy-equipment handling.

From turnkey projects to service calls, from engineering to industrial maintenance, Mécanique CNC takes on the most complex industrial-construction challenges while meeting the strictest technical, quality and safety standards.

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Manufacturing modernization

A pioneer of manufacturing modernization in Quebec

With more than 30 years of experience, AMNC is a pioneer in modernizing Quebec's manufacturing sector — a trusted partner for companies looking to optimize and automate their production lines, with expertise in petrochemicals, cement plants and distribution centres.

Known for its flexibility, 24/7 availability and rigorous respect for schedules, AMNC delivers tailored solutions in complex lifting, specialized handling and precision alignment.

Learn more ↗LinkedIn ↗

Integrated industrial works

An integrated industrial force, built for active environments

Groupe Tremblay is an integrated industrial platform specialized in the execution, management and delivery of work in industrial environments. With more than 200 employees, the group has the operational depth, responsiveness and field expertise needed to support plants through their day-to-day challenges, their major projects and their production shutdowns.

Drawing on complementary expertise in industrial construction, fabrication, mechanics, engineering, project management and site execution, its six divisions deliver an integrated, agile service adapted to the realities of the field. The group stands out for its expertise in brownfield environments and in ECI mode, where rigorous planning and early involvement optimize execution and reduce field risk.

Learn more ↗LinkedIn ↗

Divisions

Engineering
Welding
Scaffolding
Coating
Cathode plates for electrolysis
Installation

Industrial projects & maintenance

Three divisions, one integrated solution

Groupe PMI brings together three complementary divisions — FAB PSI (fabrication shop), STIM (industrial maintenance & mechanical) and PIERVAN (industrial piping & vessels) — to deliver an integrated solution for industrial projects and process-equipment maintenance.

With a team of more than 300 skilled employees, Groupe PMI supports clients across Canada, the United States and Mexico, backed by OIQ- and PEO-certified engineers.

groupepmi.ca ↗

Our track record

Past achievements

Our transactions

Building mechanics · Energy efficiency

For energy savings and improved building infrastructure

A mechanical contractor specialized in HVAC, piping, refrigeration, energy management, computerized controls and preventive maintenance, Kolostat is naturally focused on sustainable development, energy efficiency and improving building infrastructure.

Its approach is built on financially compelling and ecologically rewarding solutions that lower operating costs, improve occupant comfort and reduce carbon footprint.

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Energy efficiency

For efficient, innovative energy-efficiency projects

Specialized in the design and construction of mechanical systems, KROME puts its innovative expertise at the service of owners looking to improve their infrastructure, reduce energy costs and increase building value.

Whether for multi-residential, industrial or commercial buildings, KROME guarantees a 25–50% reduction in energy costs — renovation projects rigorously self-financed through available subsidies.

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Building mechanics

A key player in the building-mechanics sector

MSB Mechanical Ltd is a mechanical contractor specialized in installation, maintenance and repair across HVAC and plumbing, as well as mechanical welding, refrigeration and building automation.

Its expertise in sheet-metal fabrication and welding lets it deliver fully integrated solutions, carried out by a highly skilled workforce to the industry's highest standards.

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Automotive industry

A major player in Quebec’s automotive industry

Groupe Olivier Capital, founded in 2021 by Jacques Olivier and Thornhill Capital, is an emblematic automotive company. Having acquired more than nine dealerships since, the Group has become one of the leading players in Quebec's automotive industry.

Other sectors

Engineering

FNX-INNOV, a multidisciplinary engineering firm recognized for its innovation; AXC-Construction, a pioneer in engineering-construction; and Groupe S. M. International, delivering integrated, sustainable solutions internationally.
Telecommunications

Thornhill Capital consolidated several telecom companies — SC360, QuestZone, MDJ Inter-réseautage, Marcomm, Netricom — into an ecosystem of more than 1,000 employees.
Insurance

The Assura group, a consulting firm specialized in insurance solutions, estate planning, asset management, group insurance and employee benefits.
Agri-food

Acquisition of Raymond O'Neil & Sons Fisheries (New Brunswick): the company processes more than 5 million pounds of lobster and distributes its products across Canada, the U.S., Japan, Europe and Mexico.