Company lists · Data refreshed September 2026

Top 25 Refinery turnaround contractors based in Canada

Name: Refinery turnaround 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 72 companies tracked

RevenueBase identified 72 refinery turnaround contractors headquartered in Canada as of September 2026 and tracks 3,608 professional contacts across them, including 1,026 with verified work emails. Edmonton is the largest hub.

This list covers refinery turnaround 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

72Companies

3,608Contacts tracked

1,026Verified emails

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The 25 largest refinery turnaround contractors based in Canada

Ranked by team size

Top 25 of 72 refinery turnaround 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 refinery turnaround 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	Stuart Olson INC	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	1,001-5,000	871 contacts →
	Indirect evidence “At Stuart Olson, we're not just dedicated to the Canadian construction and industrial services market – we're passionate about turning projects into success stories.” Source: RevenueBase Database · checked Sep 17, 2026
2	Flint Corp	Partial evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	1,001-5,000	635 contacts →
	Partial evidence “FLINT is a leading provider for Maintenance & Turnarounds, Wear Technologies, Fabrication, Modularization & Machining, Facility Construction, Pipeline Installation & Integrity…” Source: RevenueBase Database · checked Sep 17, 2026
3	Cims Limited Partnership	Indirect evidence	Port Coquitlam, BC, CanadaHQ checked Sep 17, 2026	501-1,000	312 contacts →
	Indirect evidence “CIMS Limited Partnership is 100% Canadian Owned and Operated.” Source: RevenueBase Database · checked Sep 17, 2026
4	Melloy Industrial Services INC	Partial evidence	Nisku, AB, CanadaHQ checked Sep 17, 2026	51-200	198 contacts →
	Partial evidence “Melloy Industrial is a trusted leader in heavy industrial maintenance, turnarounds, project execution and fabrication services across Canada.” Source: RevenueBase Database · checked Sep 17, 2026
5	Lorneville	Indirect evidence	Saint John, NB, CanadaHQ checked Sep 17, 2026	501-1,000	187 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
6	Blackstone Industrial Services	Indirect evidence	Sherwood Park, AB, CanadaHQ checked Sep 17, 2026	201-500	146 contacts →
	Indirect evidence “Blackstone believes that great people make great businesses.” Source: RevenueBase Database · checked Sep 17, 2026
7	Innovator Industrial Services INC	Indirect evidence	Spruce Grove, AB, CanadaHQ checked Sep 17, 2026	201-500	96 contacts →
	Indirect evidence “Got questions or are interested in a particular service?” Source: RevenueBase Database · checked Sep 17, 2026
8	Lamsar INC	Indirect evidence	Corunna, ON, CanadaHQ checked Sep 17, 2026	501-1,000	74 contacts →
	Indirect evidence “Established in 1979 LamSar Inc.” Source: RevenueBase Database · checked Sep 17, 2026
9	Purnell Energy Services LTD	Indirect evidence	Grande Prairie, AB, CanadaHQ checked Sep 17, 2026	201-500	61 contacts →
	Indirect evidence “Purnell Energy Services is an oil & gas servicing company.” Source: RevenueBase Database · checked Sep 17, 2026
10	Fluordriver	Partial evidence	Edmonton, AB, CanadaHQ checked Sep 17, 2026	501-1,000	47 contacts →
	Partial evidence “Fluor Driver is a recognized leader in plant maintenance, turnarounds, small capital – and particularly safety – across Canada.” Source: RevenueBase Database · checked Sep 17, 2026
11	Catalyst Changers INC	Indirect evidence	Sundre, AB, CanadaHQ checked Sep 17, 2026	51-200	47 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
12	Weaver Group Limited	Strong evidence	Peace River, AB, CanadaHQ checked Sep 17, 2026	201-500	34 contacts →
	Strong evidence “Weaver Group is a quality contractor specializing in Pipeline, Facility and Civil Construction, as well as Facility Maintenance and Plant Turnarounds.” Source: RevenueBase Database · checked Sep 17, 2026
13	Clearwater Energy Services	Partial evidence	Sherwood Park, AB, CanadaHQ checked Sep 17, 2026	1,001-5,000	33 contacts →
	Partial evidence “We provide Facility Construction and Maintenance & Turnaround services to the energy and industrial end markets including Oil & Gas, Agriculture, Mining, Petrochemical, Forestry…” Source: RevenueBase Database · checked Sep 17, 2026
14	Daveta Energy Services	Partial evidence	Red Deer County, AB, CanadaHQ checked Sep 17, 2026	51-200	32 contacts →
	Partial evidence “Daveta offers customizable turnaround and project services tailored to our clients’ specific requests.” Source: RevenueBase Database · checked Sep 17, 2026
15	Tri-Energy Services LTD	Partial evidence	Red Deer County, AB, CanadaHQ checked Sep 17, 2026	51-200	25 contacts →
	Partial evidence “Turnaround & Shutdown Solutions Turnkey turnaround and shutdown execution with full project lifecycle support Industry‑leading 3D Virtual Design & Construction (VDC) for planning…” Source: RevenueBase Database · checked Sep 17, 2026
16	Canadian Structural & Mechanical LTD	Partial evidence	Sarnia Ontario, ON, CanadaHQ checked Sep 17, 2026	201-500	18 contacts →
	Partial evidence “CSM is a full service Industrial Contractor.” Source: RevenueBase Database · checked Sep 17, 2026
17	42 West Constructors LTD	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 17, 2026	51-200	17 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
18	Option Construction Corp	Indirect evidence	Spruce Grove, AB, CanadaHQ checked Sep 17, 2026	11-50	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
19	JVC Group LTD	Indirect evidence	Sherwood Park, AB, CanadaHQ checked Sep 17, 2026	51-200	13 contacts →
	Indirect evidence “Since starting as a small crew in 1997, Joe Verbeek Contracting Ltd.(JVC Ltd.) has grown into a well-established company offering a full range of maintenance, shutdown…” Source: RevenueBase Database · checked Sep 17, 2026
20	Integrated Constructors LTD	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 17, 2026	501-1,000	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
21	Southern Cross Industries Ltd- SCI Mechanical Machining Welding	Indirect evidence	Fort Mcmurray, AB, CanadaHQ checked Sep 17, 2026	51-200	10 contacts →
	Indirect evidence “SCI is a multi-service provider for all your construction and Heavy Equipment maintenance needs.” Source: RevenueBase Database · checked Sep 17, 2026
22	Northwest Industrial	Partial evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	11-50	7 contacts →
	Partial evidence “Northwest Industrial is a privately held full-service energy sector contractor specializing in facility construction.” Source: RevenueBase Database · checked Sep 17, 2026
23	BP Mechanical & Consulting LTD	Partial evidence	Red Deer, AB, CanadaHQ checked Sep 17, 2026	51-200	6 contacts →
	Partial evidence “BP Mechanical & Consulting is a Canadian-owned company that has been leading projects and Turnaround events in the oilfield, petroleum, and petrochemical industry since 2003.” Source: RevenueBase Database · checked Sep 17, 2026
24	API Industrial Services INC	Partial evidence	Sturgeon County, AB, CanadaHQ checked Sep 17, 2026	1-10	6 contacts →
	Partial evidence “We, API Industrial Services Inc, are a contractor based in the Industrial Heartland of Alberta who specializes in rotating equipment.” Source: RevenueBase Database · checked Sep 17, 2026
25	Horizon Industrial Services LTD	Partial evidence	Balzac, AB, CanadaHQ checked Sep 17, 2026	11-50	5 contacts →
	Partial evidence “We provide ongoing maintenance, equipment and machinery installation, shutdown and turnaround services, rigging, plant relocation and build out services to a wide array of clients…” 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: refinery turnaround 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 refinery turnaround contractors.
Partial evidence: Its own public description names part of refinery turnaround contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery turnaround 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 72 refinery turnaround contractors based in Canada

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Refinery turnaround contractors based in Canada at a glance

As of Sep 17, 2026

28.4%Verified-email coverage

50.1Average contacts per company

51-200Median size (employees)

12.5%Largest-city concentration · Edmonton

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 72 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 refinery turnaround 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 “refinery turnaround 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 refinery turnaround 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 refinery turnaround 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, 1,026 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 refinery turnaround 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 refinery turnaround contractors are there based in Canada?

RevenueBase identified 72 refinery turnaround 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?

Stuart Olson INC, headquartered in Calgary, tops this list with the largest team on record.

Which city has the most refinery turnaround contractors?

Edmonton leads with 9 headquartered companies, followed by Calgary (5) and Fort Saskatchewan (3).

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 1,026 verified decision-maker contacts tracked across these 72 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.