Company lists · Data refreshed November 2026

Top 25 Plant maintenance services based in Canada

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 425 companies tracked

RevenueBase identified 425 company matches for plant maintenance services associated with Canada as of November 2026 and tracks 4,581 professional contacts across them, including 1,539 with verified work emails. Calgary is the largest hub.

This list covers company matches for plant maintenance services associated with Canada, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

425Companies

4,581Contacts tracked

1,539Verified emails

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The 25 largest plant maintenance services based in Canada

Ranked by team size

Top 25 of 425 company matches for plant maintenance services based in Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Melloy Industrial Services INC	Exact match	Nisku, AB, CanadaHQ recorded Nov 6, 2026	51-200	222 contacts →
	Exact match “Melloy Industrial is a trusted leader in heavy industrial maintenance, turnarounds, project execution and fabrication services across Canada.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Gateway Mechanical Services	Exact match	Edmonton, SK, CanadaHQ recorded Nov 6, 2026	201-500	220 contacts →
	Exact match “Founded in 1968, Gateway Mechanical is a privately owned company that has established itself as a leader in the commercial and industrial refrigeration, heating and air…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Lorneville	Exact match	Saint John, AB, CanadaHQ recorded Nov 6, 2026	501-1,000	203 contacts →
	Exact match “With over 45 years of experience working on major projects for some of North America’s most prominent companies in large industrial sectors, Lorneville is an established leader in…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Blais Industries INC	Exact match	Rouyn-noranda, QC, CanadaHQ recorded Nov 6, 2026	201-500	183 contacts →
	Exact match “Notre leadership prend racine dans la compétence de nos techniciens, nos gestionnaires et nos administrateurs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Team Group	Exact match	Aurora, ON, CanadaHQ recorded Nov 6, 2026	1,001-5,000	146 contacts →
	Exact match “TEAM Group is a self-performing provider of industrial cleaning, integrated facility management, technical cleaning, facility maintenance, and specialized industrial services…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	OTS LTD	Exact match	Sydney, AB, CanadaHQ recorded Nov 6, 2026	201-500	142 contacts →
	Exact match “OUR COMPANY OTS is a leader in the industrial service industry, specializing in Pre-Commissioning, Commissioning and Start-Up services and Operations and Maintenance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Innovator Industrial Services INC	Exact match	Spruce Grove, NB, CanadaHQ recorded Nov 6, 2026	201-500	105 contacts →
	Exact match “Got questions or are interested in a particular service?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Groupe PMI	Exact match	Sherbrooke, QC, CanadaHQ recorded Nov 6, 2026	201-500	101 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	STI Maintenance	Exact match	Jonquière, QC, CanadaHQ recorded Nov 6, 2026	51-200	91 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	ROY	Exact match	Anjou, QC, CanadaHQ recorded Nov 6, 2026	1,001-5,000	91 contacts →
	Exact match “Nous offrons une gamme complète de services intégrés d'entretien d'immeubles par l'intermédiaire de cinq filiales spécialisées et plus de 1 500 employés à votre service.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	ACE Services Mécaniques	Exact match	Val-d'or, CanadaHQ recorded Nov 6, 2026	201-500	88 contacts →
	Exact match “ACE SERVICES MÉCANIQUES ENTRETIEN MÉCANIQUE MOBILE!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Western Mechanical Electrical Millwright Services LTD	Exact match	Barrie, ON, CanadaHQ recorded Nov 6, 2026	201-500	81 contacts →
	Exact match “Since Western was started in 1979, the focus of the company has always been to deliver industrial contracting services to our customers that exceed their expectations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Process Group INC	Exact match	Cambridge, ON, CanadaHQ recorded Nov 6, 2026	201-500	71 contacts →
	Exact match “Process Group Welcome to Industry's single source end-to-end supplier of engineering, procurement, construction and maintenance services to manufacturing plants, process equipment…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Préven-Tech Gestion	Exact match	Jonquière, QC, CanadaHQ recorded Nov 6, 2026	51-200	68 contacts →
	Exact match “Préven-Tech \| Gestion est une firme d'ingénieurs et de techniciens spécialisés dans les domaines mécaniques et électriques.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	EPM Mecanic	Exact match	Laval, QC, CanadaHQ recorded Nov 6, 2026	51-200	66 contacts →
	Exact match “Les origines d’EPM Mecanic remontent à 1978, alors sous le nom d’E.P.M.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	GNR Corbus	Exact match	Sherbrooke, QC, CanadaHQ recorded Nov 6, 2026	201-500	65 contacts →
	Exact match “Que ce soit en climatisation, en ventilation, en réfrigération, en congélation, en plomberie, en chauffage ou pour les procédés de gaz naturel, nous avons un technicien qualifié…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Enerserv INC	Exact match	Granby, QC, CanadaHQ recorded Nov 6, 2026	51-200	59 contacts →
	Exact match “EnerServ is a growing company with highly skilled personnel, particularly in areas such as maintenance and repair of hydroelectric and thermal energy production equipment.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	COGEP	Exact match	Quebec Canada, CanadaHQ recorded Nov 6, 2026	11-50	56 contacts →
	Exact match “About COGEP, Intelligent Maintenance, Simplified COGEP partners with maintenance and operations leaders in complex industrial environments.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	PSL Patrick Sprack LTD	Exact match	Sudbury, ON, CanadaHQ recorded Nov 6, 2026	51-200	53 contacts →
	Exact match “PSL is one of the fastest growing mechanical service providers in Northern Ontario.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Mader Group Canada	Exact match	Calgary, AB, CanadaHQ recorded Nov 6, 2026	51-200	51 contacts →
	Exact match “Mader are heavy equipment maintenance experts delivering quality repairs, preventative maintenance and expert diagnostics.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Uptime	Exact match	Surrey, BC, CanadaHQ recorded Nov 6, 2026	51-200	48 contacts →
	Exact match “INSTALL.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Fluordriver	Exact match	Edmonton, AB, CanadaHQ recorded Nov 6, 2026	501-1,000	47 contacts →
	Exact match “Fluor Driver is a recognized leader in plant maintenance, turnarounds, small capital – and particularly safety – across Canada.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	BIG Country Equipment Repair LTD	Exact match	Kamloops, BC, CanadaHQ recorded Nov 6, 2026	51-200	44 contacts →
	Exact match “Big Country Equipment Repair Ltd.(BCER), established in Kamloops, B.C, in 2017, is a family-owned company delivering top-tier service with a focus on safety and customer…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Neve Refrigeration INC Groupe Neve	Exact match	Longueuil, QC, CanadaHQ recorded Nov 6, 2026	11-50	39 contacts →
	Exact match “Nous somme une entreprise qui œuvre dans le domaine de la climatisation, réfrigération, ventilation, plomberie, combustion commercial et industrielle.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Delta Valley Services LTD	Exact match	Edmonton, CanadaHQ recorded Nov 6, 2026	201-500	38 contacts →
	Exact match “Delta Valley actively pursues small to large contracts with a demand for neat, orderly, and prolific landscape.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “plant maintenance services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 425 plant maintenance services based in Canada

See the full list, filter by size, metro and specialty, and access 1,539 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Plant maintenance services based in Canada at a glance

As of Nov 6, 2026

33.6%Verified-email coverage

10.8Average contacts per company

11-50Median size (employees)

5.2%Largest-city concentration · Calgary

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

200

11-50

139

51-200

201-500

501-1,000

1,001-5,000

10001+

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 425 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Canada whose business descriptions match “plant maintenance services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,539 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “plant maintenance services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many plant maintenance services are there based in Canada?

RevenueBase identified 425 company matches for plant maintenance services associated with Canada as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Melloy Industrial Services INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most plant maintenance services?

Calgary leads with 22 company records, followed by Edmonton (22) and Quebec (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,539 professional contacts with verified work emails tracked across these 425 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.