Company lists · Data refreshed September 2026

Top 25 Plant maintenance contractors based in Canada

Name: Plant maintenance contractors based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 199 companies tracked

RevenueBase identified 199 plant maintenance contractors headquartered in Canada as of September 2026 and tracks 1,848 professional contacts across them, including 542 with verified work emails. Calgary is the largest hub.

This list covers plant maintenance contractors headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

199Companies

1,848Contacts tracked

542Verified emails

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The 25 largest plant maintenance contractors based in Canada

Ranked by team size

Top 25 of 199 plant maintenance contractors based in Canada, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to plant maintenance contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OTS LTD	Partial evidence	Sydney, NS, CanadaHQ checked Sep 17, 2026	201-500	142 contacts →
	Partial evidence “OUR COMPANY OTS is a leader in the industrial service industry, specializing in Pre-Commissioning, Commissioning and Start-Up services and Operations and Maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
2	Team Group	Partial evidence	Aurora, ON, CanadaHQ checked Sep 17, 2026	1,001-5,000	137 contacts →
	Partial evidence “TEAM Group is a self-performing provider of industrial cleaning, integrated facility management, technical cleaning, facility maintenance, and specialized industrial services…” Source: RevenueBase Database · checked Sep 17, 2026
3	Groupe PMI	Partial evidence	Sherbrooke, QC, CanadaHQ checked Sep 17, 2026	201-500	113 contacts →
	Partial evidence “Le Groupe PMI a pour mission de développer une offre de services complète pour la réalisation de projets industriels et de maintenance pour l'ensemble des industries primaires…” Source: RevenueBase Database · checked Sep 17, 2026
4	STI Maintenance	Partial evidence	Jonquière, QC, CanadaHQ checked Sep 17, 2026	51-200	94 contacts →
	Partial evidence “For over 30 years, the team of more than 95 professionals at STI Maintenance has been providing maintenance management action plans to optimize your equipment and installations.” Source: RevenueBase Database · checked Sep 17, 2026
5	EPM Mecanic	Indirect evidence	Laval, QC, CanadaHQ checked Sep 17, 2026	51-200	67 contacts →
	Indirect evidence “Les origines d’EPM Mecanic remontent à 1978, alors sous le nom d’E.P.M.” Source: RevenueBase Database · checked Sep 17, 2026
6	PSL Patrick Sprack LTD	Indirect evidence	Sudbury, ON, CanadaHQ checked Sep 17, 2026	51-200	51 contacts →
	Indirect evidence “PSL is one of the fastest growing mechanical service providers in Northern Ontario.” Source: RevenueBase Database · checked Sep 17, 2026
7	COGEP	Partial evidence	Quebec Canada, CanadaHQ checked Sep 17, 2026	11-50	51 contacts →
	Partial evidence “About COGEP, Intelligent Maintenance, Simplified COGEP partners with maintenance and operations leaders in complex industrial environments.” Source: RevenueBase Database · checked Sep 17, 2026
8	Uptime	Indirect evidence	Surrey, BC, CanadaHQ checked Sep 17, 2026	51-200	48 contacts →
	Indirect evidence “INSTALL.” Source: RevenueBase Database · checked Sep 17, 2026
9	Mader Group Canada	Partial evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	51-200	36 contacts →
	Partial evidence “Mader are heavy equipment maintenance experts delivering quality repairs, preventative maintenance and expert diagnostics.” Source: RevenueBase Database · checked Sep 17, 2026
10	Neutron Factory Works INC	Indirect evidence	Delta, BC, CanadaHQ checked Sep 17, 2026	11-50	35 contacts →
	Indirect evidence “At Neutron we specialize in ensuring your production lines run uninterrupted.” Source: RevenueBase Database · checked Sep 17, 2026
11	Delta Valley Services LTD	Indirect evidence	Edmonton, CanadaHQ checked Sep 17, 2026	201-500	34 contacts →
	Indirect evidence “Delta Valley actively pursues small to large contracts with a demand for neat, orderly, and prolific landscape.” Source: RevenueBase Database · checked Sep 17, 2026
12	Mr. MOW IT ALL	Indirect evidence	Toronto, CanadaHQ checked Sep 17, 2026	51-200	33 contacts →
	Indirect evidence “Mr.” Source: RevenueBase Database · checked Sep 17, 2026
13	Premier Landscaping INC	Partial evidence	Surrey, BC, CanadaHQ checked Sep 17, 2026	51-200	32 contacts →
	Partial evidence “Premier provides strategic annual grounds & landscape maintenance programs for large Commercial, Industrial, Retail & Educational sites.” Source: RevenueBase Database · checked Sep 17, 2026
14	Mécanique Industrielle Fortier ET Fils Miff	Indirect evidence	La Prairie, QC, CanadaHQ checked Sep 17, 2026	51-200	24 contacts →
	Indirect evidence “Mécanique Industrielle Fortier et Fils inc.” Source: RevenueBase Database · checked Sep 17, 2026
15	Welldone Mechanical Services	Indirect evidence	Regina, SK, CanadaHQ checked Sep 17, 2026	11-50	23 contacts →
	Indirect evidence “Welldone Mechanical Services: Delivering Excellence in HVAC Solutions Since 1965 As Saskatchewan's premier HVAC solutions provider, Welldone Mechanical Services combines nearly 60…” Source: RevenueBase Database · checked Sep 17, 2026
16	LOK Energy Services INC	Partial evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	51-200	23 contacts →
	Partial evidence “Since 2001, LOK Energy Services specializes in field maintenance services for critical rotating machinery including steam and gas turbines, generators, and peripheral systems.” Source: RevenueBase Database · checked Sep 17, 2026
17	Facility Network	Indirect evidence	Milton, ON, CanadaHQ checked Sep 17, 2026	501-1,000	22 contacts →
	Indirect evidence “The Facility Network Advantage At Facility Network, our commitment to success drives everything we do.” Source: RevenueBase Database · checked Sep 17, 2026
18	Lisi Services	Indirect evidence	Vaughan, ON, CanadaHQ checked Sep 17, 2026	11-50	21 contacts →
	Indirect evidence “Keeping your mechanical systems flowing is what Lisi does best, and since 1979, we have been doing just that.” Source: RevenueBase Database · checked Sep 17, 2026
19	Cross Canada Millwright LTD	Indirect evidence	Nisku, AB, CanadaHQ checked Sep 17, 2026	11-50	19 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
20	Quality Millwright	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 17, 2026	11-50	18 contacts →
	Indirect evidence “Alberta based company, proven to be a reputable and highly competent industrial services provider.” Source: RevenueBase Database · checked Sep 17, 2026
21	Task Engineering LTD	Indirect evidence	Campbell River, CanadaHQ checked Sep 17, 2026	51-200	17 contacts →
	Indirect evidence “Task Engineering's core business is providing management assistance with experienced and stable management people to support our client’s teams.” Source: RevenueBase Database · checked Sep 17, 2026
22	FLM Pro-Mécanique INC	Partial evidence	St-hyacinthe, QC, CanadaHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “La société se spécialise dans le service de maintenance industrielle.” Source: RevenueBase Database · checked Sep 17, 2026
23	Lawn Troopers INC	Indirect evidence	Caledon, CanadaHQ checked Sep 17, 2026	51-200	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
24	Ammco INC	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 17, 2026	1-10	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	Clintar Commercial Outdoor Services - Ottawa	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	12 contacts →
	Indirect evidence “Clintar Commercial Outdoor Services of Ottawa is a premier provider of professional landscape management services for commercial, corporate and government properties in the…” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: plant maintenance contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names plant maintenance contractors.
Partial evidence: Its own public description names part of plant maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name plant maintenance contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 199 plant maintenance contractors based in Canada

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Plant maintenance contractors based in Canada at a glance

As of Sep 17, 2026

29.3%Verified-email coverage

9.3Average contacts per company

11-50Median size (employees)

6.5%Largest-city concentration · Calgary

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 199 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among plant maintenance contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Canada whose own description of what they do matches “plant maintenance contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names plant maintenance contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among plant maintenance contractors, and records with no verified work email. Companies headquartered outside Canada are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 542 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names plant maintenance contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many plant maintenance contractors are there based in Canada?

RevenueBase identified 199 plant maintenance contractors headquartered in Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

OTS LTD, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most plant maintenance contractors?

Calgary leads with 13 headquartered companies, followed by Edmonton (9) and Toronto (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 542 verified decision-maker contacts tracked across these 199 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.