Company lists · Data refreshed September 2026

Top 25 Offshore construction contractors based in Canada

Name: Offshore construction 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 76 companies tracked

RevenueBase identified 76 offshore construction contractors headquartered in Canada as of September 2026 and tracks 1,789 professional contacts across them, including 465 with verified work emails. Dartmouth is the largest hub.

This list covers offshore construction 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

76Companies

1,789Contacts tracked

465Verified emails

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The 25 largest offshore construction contractors based in Canada

Ranked by team size

Top 25 of 76 offshore construction 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 offshore construction 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	Atlantic Towing	Partial evidence	Saint John, NB, CanadaHQ checked Sep 17, 2026	501-1,000	194 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
2	Fraser River Pile And Dredge GP INC	Indirect evidence	New Westminster, BC, CanadaHQ checked Sep 17, 2026	51-200	132 contacts →
	Indirect evidence “Fraser River Pile & Dredge (GP) Inc.(FRPD) was incorporated in Alberta in 2008, and is a successor company to Fraser River Pile Driving Company (founded in 1911).” Source: RevenueBase Database · checked Sep 17, 2026
3	Vancouver Pile Driving	Partial evidence	North Vancouver, BC, CanadaHQ checked Sep 17, 2026	51-200	104 contacts →
	Partial evidence “VanPile is one of the largest marine general contractor in Canada.” Source: RevenueBase Database · checked Sep 17, 2026
4	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
5	Reliance Offshore, A Subsidiary Of I. H. Mathers	Partial evidence	St John’s, NL, CanadaHQ checked Sep 17, 2026	201-500	64 contacts →
	Partial evidence “Reliance Offshore is the offshore & marine personnel subsidiary of the I.” Source: RevenueBase Database · checked Sep 17, 2026
6	Albion Marine Solutions	Indirect evidence	Delta, BC, CanadaHQ checked Sep 17, 2026	51-200	59 contacts →
	Indirect evidence “Albion Marine Solutions Ltd, Canada is dedicated to providing shipping industry with reliable, professional and cost effective consultancy, engineering, site supervision, retrofit…” Source: RevenueBase Database · checked Sep 17, 2026
7	Siem Offshore Canada	Partial evidence	Dartmouth, NS, CanadaHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial evidence “Siem Offshore manages a harsh-weather fleet of offshore support vessels servicing major offshore energy companies.” Source: RevenueBase Database · checked Sep 17, 2026
8	Carbonex Contractors LTD	Partial evidence	Whitecourt, AB, CanadaHQ checked Sep 17, 2026	201-500	47 contacts →
	Partial evidence “At Carbonex, we strive to provide innovative and safe solutions for construction and maintenance that exceed client expectations.” Source: RevenueBase Database · checked Sep 17, 2026
9	Pillar Oilfield Projects LTD	Partial evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	51-200	40 contacts →
	Partial evidence “Pillar Oilfield Projects Ltd is an oil & energy mechanical and general contractor based out of Alberta with a fabrication shop in Edmonton.” Source: RevenueBase Database · checked Sep 17, 2026
10	Arjae Design Solutions LTD	Indirect evidence	Nisku, AB, CanadaHQ checked Sep 17, 2026	51-200	35 contacts →
	Indirect evidence “We are a leader in unique and creative engineering and fabrication solutions to the Oil & Gas industry by top quality, experienced professionals.” Source: RevenueBase Database · checked Sep 17, 2026
11	Cooec Canada	Strong evidence	Clagary, AB, CanadaHQ checked Sep 17, 2026	51-200	29 contacts →
	Strong evidence “COOEC is now one of the largest EPCI contractors for the offshore oil and gas industry in North America.” Source: RevenueBase Database · checked Sep 17, 2026
12	Mackinnon & Olding	Partial evidence	Dartmouth, NS, CanadaHQ checked Sep 17, 2026	201-500	28 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
13	Canpac Marine Services INC	Partial evidence	North Vancouver, BC, CanadaHQ checked Sep 17, 2026	51-200	26 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
14	Zutphen Contractors	Partial evidence	Port Hood, NS, CanadaHQ checked Sep 17, 2026	51-200	23 contacts →
	Partial evidence “Zutphen Contractors is a company based out of 10442 Nova Scotia Trunk 19, Port Hood, Nova Scotia, Canada.” Source: RevenueBase Database · checked Sep 17, 2026
15	Dominion Diving LTD	Indirect evidence	Dartmouth, NS, CanadaHQ checked Sep 17, 2026	11-50	23 contacts →
	Indirect evidence “Founded in 1969, Dominion Diving Limited has advanced to become the largest professional diving, ROV and subsea services company in Canada.” Source: RevenueBase Database · checked Sep 17, 2026
16	Petro-Line Construction Group	Partial evidence	Nisku, AB, CanadaHQ checked Sep 17, 2026	51-200	20 contacts →
	Partial evidence “Petro-Line, incorporated in 1977, is involved in the construction, maintenance, and upgrading of Pipelines and Facilities in the Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 17, 2026
17	Géodex	Indirect evidence	Boisbriand, QC, CanadaHQ checked Sep 17, 2026	51-200	18 contacts →
	Indirect evidence “Fondée en 1973 par Mario Giacomo et membre de la grande famille CBF depuis le 1er septembre 2023, Géodex est votre partenaire de confiance pour tous vos besoins en fondations…” Source: RevenueBase Database · checked Sep 17, 2026
18	Seaforth Geosurveys INC	Partial evidence	Dartmouth, NS, CanadaHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “For more than 30 years, Seaforth has embraced innovation and adapted through change to deliver reliable offshore survey, geotechnical, and site characterisation solutions in the…” Source: RevenueBase Database · checked Sep 17, 2026
19	Indyco INC	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 17, 2026	51-200	15 contacts →
	Indirect evidence “INDYCO est une entreprise spécialisée en génie civil maritime et environnemental, incluant la réalisation de travaux sous-marins spécialisés.” Source: RevenueBase Database · checked Sep 17, 2026
20	Frontier	Partial evidence	Paradise, NL, CanadaHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “Founded in 2013, we are proud of what we have become, a team of skilled problem-solving individuals experienced in engineering, procurement, construction, installation, and…” Source: RevenueBase Database · checked Sep 17, 2026
21	Dean Construction Company	Strong evidence	Lasalle, ON, CanadaHQ checked Sep 17, 2026	11-50	8 contacts →
	Strong evidence “Large scale marine contractor specializing in heavy marine construction with a focus on pipeline deployments, pile driving, shoreline protection, full construction of water…” Source: RevenueBase Database · checked Sep 17, 2026
22	ASI Group	Partial evidence	Hamilton, ON, CanadaHQ checked Sep 17, 2026	51-200	7 contacts →
	Partial evidence “ASI Group Ltd (ASI) is a 120 person firm that was founded in 1987 by a core group of individuals with backgrounds in marine biology, commercial diving, and marine construction.” Source: RevenueBase Database · checked Sep 17, 2026
23	On Site Projects LTD	Partial evidence	Sherwood Park, AB, CanadaHQ checked Sep 17, 2026	51-200	6 contacts →
	Partial evidence “When you need results, we deliver the best in oilfield construction and maintenance services.” Source: RevenueBase Database · checked Sep 17, 2026
24	Dominion Divers 2003 LTD	Indirect evidence	Navin, MB, CanadaHQ checked Sep 17, 2026	11-50	5 contacts →
	Indirect evidence “We are ….” Source: RevenueBase Database · checked Sep 17, 2026
25	TCR Coastal Power LTD	Partial evidence	Delta, BC, CanadaHQ checked Sep 17, 2026	11-50	4 contacts →
	Partial evidence “TCR Coastal Power Ltd is a specialized electrical contractor focusing on MARITIME, OFF-GRID, RENEWABLE and GENERAL ELECTRICAL services.” 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: offshore construction 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 offshore construction contractors.
Partial evidence: Its own public description names part of offshore construction contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore construction 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 76 offshore construction contractors based in Canada

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Offshore construction contractors based in Canada at a glance

As of Sep 17, 2026

26.0%Verified-email coverage

23.5Average contacts per company

11-50Median size (employees)

9.2%Largest-city concentration · Dartmouth

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 76 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 offshore construction 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 “offshore construction 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 offshore construction 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 offshore construction 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, 465 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 offshore construction 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 offshore construction contractors are there based in Canada?

RevenueBase identified 76 offshore construction 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?

Atlantic Towing, headquartered in Saint John, tops this list with the largest team on record.

Which city has the most offshore construction contractors?

Dartmouth leads with 7 headquartered companies, followed by North Vancouver (5) and Burnaby (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 465 verified decision-maker contacts tracked across these 76 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.