Company lists · Data refreshed November 2026

Top 25 Offshore maintenance contractors based in Canada

RevenueBase identified 94 company matches for offshore maintenance contractors associated with Canada as of November 2026 and tracks 1,181 professional contacts across them, including 227 with verified work emails. Calgary is the largest hub.

This list covers company matches for offshore 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 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
94Companies
1,181Contacts tracked
227Verified emails
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The 25 largest offshore maintenance contractors based in Canada

Ranked by team size
Top 25 of 94 company matches for offshore maintenance contractors 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSaint John, NB, CanadaHQ recorded Nov 6, 2026501-1,000198 contacts →

Exact match

“Atlantic Towing is a leading provider of Offshore Supply, Port and Coastal marine services, operating in the North Atlantic, South Atlantic, Arctic and Pacific Coastal regions, as…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSt John’s, NL, CanadaHQ recorded Nov 6, 2026201-50070 contacts →

Exact match

“Reliance Offshore is the offshore & marine personnel subsidiary of the I.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchCalgary, AB, CanadaHQ recorded Nov 6, 202651-20051 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
4Exact matchDartmouth, NS, CanadaHQ recorded Nov 6, 202651-20044 contacts →

Exact match

“Siem Offshore manages a harsh-weather fleet of offshore support vessels servicing major offshore energy companies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchDartmouth, NS, CanadaHQ recorded Nov 6, 2026201-50040 contacts →

Exact match

“MacKinnon & Olding (M&O) is a Nova Scotia-based marine construction and industrial services company with 40 years of experience and one of Eastern Canada’s leading providers of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMontreal, QC, CanadaHQ recorded Nov 6, 202651-20039 contacts →

Exact match

“NAVAMAR's experienced staff is capable of carrying out every type of ship repair required.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchNisku, AB, CanadaHQ recorded Nov 6, 202651-20037 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 · Nov 6, 2026 · View company records in RevenueBase
8Exact matchGrande Prairie, AB, CanadaHQ recorded Nov 6, 2026201-50036 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchNorth Vancouver, BC, CanadaHQ recorded Nov 6, 202651-20030 contacts →

Exact match

“Canpac Marine Services Inc, is based in the Port of Vancouver, Canada and has been providing marine services to inland, coastal, and offshore sectors since 1965.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchCalgary, AB, CanadaHQ recorded Nov 6, 202651-20026 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchNisku, AB, CanadaHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Canfish Services is proud to have the expertise required to provide technical support and equipment for all levels of fishing and pipe recovery well repair requirements.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMatane, QC, CanadaHQ recorded Nov 6, 202651-20018 contacts →

Exact match

“Meriden specializes in conception, fabrication, repair and inspection of products and development in specific Maritimes and industrial Domain.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSt-hyacinthe, QC, CanadaHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“La société se spécialise dans le service de maintenance industrielle.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchKehewin, AB, CanadaHQ recorded Nov 6, 202611-5015 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCalgary, AB, CanadaHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“Providing oilfield solutions relating to non-destructive testing, manufacturing, repair, tool storage with inventory management, and preventative maintenance services for our…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchRichmond Hill, ON, CanadaHQ recorded Nov 6, 20261-1013 contacts →

Exact match

“From power generation to pulp and paper, agricultural to marine, water processing to oil and gas, Belzona Great Lakes, a Belzona exclusive authorized Distributor for the province…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchFort St John, BC, CanadaHQ recorded Nov 6, 202651-20011 contacts →

Exact match

“Company Overview - D-W Wilson Services Ltd.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLasalle, ON, CanadaHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Large scale marine contractor specializing in heavy marine construction with a focus on pipeline deployments, pile driving, shoreline protection, full construction of water…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchCap-aux-meules, QC, CanadaHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Fièrement établie aux Îles-de-la-Madeleine, OSM Atlantique offre des services de réparation, de maintenance, d’usinage et d’inspection pour les moteurs diesel de grande envergure…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchDrummondville, QC, CanadaHQ recorded Nov 6, 202651-2008 contacts →

Exact match

“Entrepreneur Pétrolier”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLiverpool, NS, CanadaHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Mersey Marine Limited (formerly STENPRO) is located in Liverpool, Nova Scotia.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchNavin, MB, CanadaHQ recorded Nov 6, 202611-505 contacts →

Exact match

“We are ….”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchSaskatoon, SK, CanadaHQ recorded Nov 6, 202611-504 contacts →

Exact match

“Serving Canadas mining, forestry and oil and gas sectors, our clients require proven value, quality and performance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSevern Bridge, ON, CanadaHQ recorded Nov 6, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchDawson Creek, BC, CanadaHQ recorded Nov 6, 202611-502 contacts →

Exact match

“Nor-Kam is a locally owned and operated energy equipment and service provider.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 94 offshore maintenance contractors based in Canada

See the full list, filter by size, metro and specialty, and access 227 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Offshore maintenance contractors based in Canada at a glance

As of Nov 6, 2026
19.2%Verified-email coverage
12.6Average contacts per company
11-50Median size (employees)
6.4%Largest-city concentration · Calgary
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
33
11-50
38
51-200
16
201-500
4
501-1,000
1
10001+
1

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 94 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 “offshore 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 227 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 “offshore maintenance contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many offshore maintenance contractors are there based in Canada?

RevenueBase identified 94 company matches for offshore maintenance contractors 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?

Atlantic Towing tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most offshore maintenance contractors?

Calgary leads with 6 company records, followed by Dartmouth (5) and Grande Prairie (4).

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 227 professional contacts with verified work emails tracked across these 94 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.