Company lists · Data refreshed October 2026

Top 25 Oil refinery maintenance contractors based in Canada

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

Compiled by the RevenueBase Data Team Data refreshed Oct 22, 2026 139 companies tracked

RevenueBase identified 139 company matches for oil refinery maintenance contractors associated with Canada as of October 2026 and tracks 2,624 professional contacts across them, including 722 with verified work emails. Calgary is the largest hub.

This list covers company matches for oil refinery maintenance contractors 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 October 22, 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 Oct 22, 2026 How this list was built

139Companies

2,624Contacts tracked

722Verified emails

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The 25 largest oil refinery maintenance contractors based in Canada

Ranked by team size

Top 25 of 139 company matches for oil refinery maintenance contractors based in Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 22, 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 Oct 22, 2026	51-200	211 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 · Oct 22, 2026 · View company records in RevenueBase
2	Lorneville	Exact match	Saint John, NB, CanadaHQ recorded Oct 22, 2026	501-1,000	194 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 · Oct 22, 2026 · View company records in RevenueBase
3	Blackstone Industrial Services	Exact match	Sherwood Park, AB, CanadaHQ recorded Oct 22, 2026	201-500	147 contacts →
	Exact match “Blackstone believes that great people make great businesses.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
4	OTS LTD	Exact match	Sydney, NS, CanadaHQ recorded Oct 22, 2026	201-500	137 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 · Oct 22, 2026 · View company records in RevenueBase
5	Teng INC	Exact match	Mississauga, ON, CanadaHQ recorded Oct 22, 2026	51-200	128 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
6	Groupe PMI	Exact match	Sherbrooke, QC, CanadaHQ recorded Oct 22, 2026	201-500	104 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 · Oct 22, 2026 · View company records in RevenueBase
7	CFM Custom Fabricators & Machinists LTD	Exact match	Saint John, NB, CanadaHQ recorded Oct 22, 2026	201-500	101 contacts →
	Exact match “CFM is a company within the Construction & Equipment Division of J.D.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
8	Innovator Industrial Services INC	Exact match	Spruce Grove, AB, CanadaHQ recorded Oct 22, 2026	201-500	100 contacts →
	Exact match “Got questions or are interested in a particular service?” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
9	SCG Process	Exact match	Langley, BC, CanadaHQ recorded Oct 22, 2026	51-200	59 contacts →
	Exact match “At SCG Process we harness the power of our collective of specialists; people committed to helping our clients become the stewards of their gas and fluid process performance across…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
10	Purnell Energy Services LTD	Exact match	Grande Prairie, AB, CanadaHQ recorded Oct 22, 2026	201-500	53 contacts →
	Exact match “Purnell Energy Services is an oil & gas servicing company.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
11	Catalyst Changers INC	Exact match	Sundre, AB, CanadaHQ recorded Oct 22, 2026	51-200	51 contacts →
	Exact match “Catalyst Changers has become a recognized go-to source for the Oil, Gas and Petro-chemical Industry when they need dependable Catalyst Changeover and Shutdown Maintenance Services.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
12	Carbonex Contractors LTD	Exact match	Whitecourt, AB, CanadaHQ recorded Oct 22, 2026	201-500	49 contacts →
	Exact match “At Carbonex, we strive to provide innovative and safe solutions for construction and maintenance that exceed client expectations.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
13	Mader Group Canada	Exact match	Calgary, AB, CanadaHQ recorded Oct 22, 2026	51-200	47 contacts →
	Exact match “Mader are heavy equipment maintenance experts delivering quality repairs, preventative maintenance and expert diagnostics.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
14	Arjae Design Solutions LTD	Exact match	Nisku, AB, CanadaHQ recorded Oct 22, 2026	51-200	36 contacts →
	Exact match “We are a leader in unique and creative engineering and fabrication solutions to the Oil & Gas industry by top quality, experienced professionals.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
15	Reed Energy Group INC	Exact match	Grande Prairie, AB, CanadaHQ recorded Oct 22, 2026	201-500	35 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
16	Weaver Group Limited	Exact match	Peace River, AB, CanadaHQ recorded Oct 22, 2026	201-500	35 contacts →
	Exact match “Weaver Group is a quality contractor specializing in Pipeline, Facility and Civil Construction, as well as Facility Maintenance and Plant Turnarounds.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
17	Terrafirma Resources	Exact match	Clearwater County, AB, CanadaHQ recorded Oct 22, 2026	51-200	33 contacts →
	Exact match “Terrafirma is an Alberta pipeline, facility, mechanical and oilfield maintenance company servicing the oil industry throughout Western Canada.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
18	Fluordriver	Exact match	Edmonton, AB, CanadaHQ recorded Oct 22, 2026	501-1,000	26 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 · Oct 22, 2026 · View company records in RevenueBase
19	Boon Energy Services	Exact match	Bonnyville, AB, CanadaHQ recorded Oct 22, 2026	51-200	26 contacts →
	Exact match “Boon Energy is a leading service provider for Wellhead Maintenance, Blasting & Coating, Facility Maintenance and Picker Services with operations in Alberta and NWT.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
20	Enhanced Engineering E2 Consulting LTD	Exact match	Lloydminster, AB, CanadaHQ recorded Oct 22, 2026	11-50	23 contacts →
	Exact match “Enhanced Engineering (E2 Consulting) Ltd.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
21	LOK Energy Services INC	Exact match	Calgary, AB, CanadaHQ recorded Oct 22, 2026	51-200	23 contacts →
	Exact match “Since 2001, LOK Energy Services specializes in field maintenance services for critical rotating machinery including steam and gas turbines, generators, and peripheral systems.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
22	TES Group INC	Exact match	Sherwood Park, AB, CanadaHQ recorded Oct 22, 2026	11-50	22 contacts →
	Exact match “TES Group Inc.(TES) is a unique full-solution provider and one-stop shop for industrial construction, maintenance and technical services for a range of steam, power, and process…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
23	Petro-Line Construction Group	Exact match	Nisku, AB, CanadaHQ recorded Oct 22, 2026	51-200	21 contacts →
	Exact match “Petro-Line, incorporated in 1977, is involved in the construction, maintenance, and upgrading of Pipelines and Facilities in the Oil and Gas Industry.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
24	Streamline FMS LTD	Exact match	Sherwood Park, AB, CanadaHQ recorded Oct 22, 2026	11-50	20 contacts →
	Exact match “Streamline is based out of Sherwood Park, AB.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
25	Profoxx Energy Services LTD	Exact match	Fox Creek, AB, CanadaHQ recorded Oct 22, 2026	51-200	18 contacts →
	Exact match “Founded in the summer of 2010, ProFoxx Energy Services is a young company located in Fox Creek, Alberta.” Recorded in the RevenueBase company graph · Oct 22, 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 “oil refinery maintenance contractors”. 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 139 oil refinery maintenance contractors based in Canada

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Oil refinery maintenance contractors based in Canada at a glance

As of Oct 22, 2026

27.5%Verified-email coverage

18.9Average contacts per company

11-50Median size (employees)

10.1%Largest-city concentration · Calgary

Oct 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 139 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 “oil refinery maintenance contractors” 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 722 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 October 22, 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 “oil refinery maintenance contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil refinery maintenance contractors are there based in Canada?

RevenueBase identified 139 company matches for oil refinery maintenance contractors associated with Canada as of October 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 oil refinery maintenance contractors?

Calgary leads with 14 company records, followed by Edmonton (12) and Nisku (6).

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 722 professional contacts with verified work emails tracked across these 139 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 October 22, 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.