Company lists · Data refreshed September 2026

Top 25 Underwater construction firms based in Canada

Name: Underwater construction firms based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 85 companies tracked

RevenueBase identified 85 company matches for underwater construction firms associated with Canada as of September 2026 and tracks 1,317 professional contacts across them, including 319 with verified work emails. North Vancouver is the largest hub.

This list covers company matches for underwater construction firms 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 September 19, 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 Sep 19, 2026 How this list was built

85Companies

1,317Contacts tracked

319Verified emails

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The 25 largest underwater construction firms based in Canada

Ranked by team size

Top 25 of 85 company matches for underwater construction firms based in Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Mcnally Companies	Exact match	Hamilton, ON, CanadaHQ recorded Sep 19, 2026	201-500	172 contacts →
	Exact match “McNally, a subsidiary of Weeks Marine, Inc, is a heavy construction company that specializes in tunnel and marine construction.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Fraser River Pile And Dredge GP INC	Exact match	New Westminster, BC, CanadaHQ recorded Sep 19, 2026	51-200	132 contacts →
	Exact match “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).” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	JJM Construction LTD	Exact match	Delta, BC, CanadaHQ recorded Sep 19, 2026	51-200	128 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Vancouver Pile Driving	Exact match	North Vancouver, BC, CanadaHQ recorded Sep 19, 2026	51-200	104 contacts →
	Exact match “VanPile is one of the largest marine general contractor in Canada.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Ideal Welders LTD	Exact match	Delta, BC, CanadaHQ recorded Sep 19, 2026	51-200	91 contacts →
	Exact match “For over 55 years, Ideal welders has been serving the pulp & paper, petrochemical, oil & gas, and marine industries.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Canada Pump & Power	Exact match	Fort Saskatchewan, AB, CanadaHQ recorded Sep 19, 2026	51-200	52 contacts →
	Exact match “Canada Pump & Power is a leading provider of industrial marine services and products, specializing in four core areas: DIVE – PUMP – BARGE – DREDGE.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Canpac Marine Services INC	Exact match	North Vancouver, BC, CanadaHQ recorded Sep 19, 2026	51-200	26 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 · Sep 19, 2026 · View company records in RevenueBase
8	ASI Marine	Exact match	Stoney Creek, ON, CanadaHQ recorded Sep 19, 2026	51-200	25 contacts →
	Exact match “ASI Marine (ASI) delivers customized, data-driven solutions for underwater surveys, inspections, maintenance, tunneling, and mussel monitoring & control.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	MVC Océan INC	Exact match	Trois-rivières, QC, CanadaHQ recorded Sep 19, 2026	51-200	25 contacts →
	Exact match “MVC Océan has been carrying out maritime and underwater projects since 1970.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Zutphen Contractors	Exact match	Port Hood, NS, CanadaHQ recorded Sep 19, 2026	51-200	23 contacts →
	Exact match “Zutphen Contractors is a company based out of 10442 Nova Scotia Trunk 19, Port Hood, Nova Scotia, Canada.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Dominion Diving LTD	Exact match	Dartmouth, NS, CanadaHQ recorded Sep 19, 2026	11-50	23 contacts →
	Exact match “Founded in 1969, Dominion Diving Limited has advanced to become the largest professional diving, ROV and subsea services company in Canada.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Géodex	Exact match	Boisbriand, QC, CanadaHQ recorded Sep 19, 2026	51-200	18 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Indyco INC	Exact match	Brossard, QC, CanadaHQ recorded Sep 19, 2026	51-200	15 contacts →
	Exact match “INDYCO est une entreprise spécialisée en génie civil maritime et environnemental, incluant la réalisation de travaux sous-marins spécialisés.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Divex Marine INC	Exact match	Mont-st-hilaire, QC, CanadaHQ recorded Sep 19, 2026	11-50	15 contacts →
	Exact match “En affaires depuis 1963, Divex Marine se spécialise dans le service de travaux sous-marins destinés à appuyer les entreprises maritimes, les firmes d'ingénierie, les organismes…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Strong Enterprises	Exact match	Belleville, ON, CanadaHQ recorded Sep 19, 2026	51-200	13 contacts →
	Exact match “Strong Enterprises, parent company to Strong Bros.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Gersol	Exact match	Saint-roch-de-richelieu, QC, CanadaHQ recorded Sep 19, 2026	11-50	8 contacts →
	Exact match “Chez Gersol, nous sommes les experts en matière de travaux maritimes, de projets de dragage, en génie civil et en gestion terrestre des sédiments.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Dean Construction Company	Exact match	Lasalle, ON, CanadaHQ recorded Sep 19, 2026	11-50	8 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 · Sep 19, 2026 · View company records in RevenueBase
18	R.J. Macisaac Construction LTD	Exact match	Antigonish, NS, CanadaHQ recorded Sep 19, 2026	51-200	7 contacts →
	Exact match “R.J.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Services Subaquatiques BLM INC	Exact match	Lévis, QC, CanadaHQ recorded Sep 19, 2026	11-50	7 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Service Sous-Marin - SSM	Exact match	Laval, QC, CanadaHQ recorded Sep 19, 2026	1-10	7 contacts →
	Exact match “SSM est une unité de plongée polyvalente répondant à une diversité de besoins de maintenance et de construction sous-marine.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Dominion Divers 2003 LTD	Exact match	Navin, MB, CanadaHQ recorded Sep 19, 2026	11-50	5 contacts →
	Exact match “We are ….” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Groupe Riverin Maritime	Exact match	Saguenay, QC, CanadaHQ recorded Sep 19, 2026	11-50	5 contacts →
	Exact match “Groupe Riverin Maritime, spécialisé en transport maritime et en travaux maritimes, location de barges de rivières, plongeurs, scaphandriers, inspection et travaux sous-marins” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	MDI Contracting	Exact match	Paradise, NL, CanadaHQ recorded Sep 19, 2026	1-10	5 contacts →
	Exact match “MDI Contracting is a locally owned & operated multi-service commercial diving company with its base on the Avalon Peninsula, Newfoundland & Labrador, Canada.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	JD Marine And Diving INC	Exact match	Cardigan, PE, CanadaHQ recorded Sep 19, 2026	11-50	4 contacts →
	Exact match “JD Marine and Diving Inc is a leader in the underwater commercial diving field as well as “surface” construction, whether in terms of maintaining and repairing or constructing…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Techno-Soude Marine	Exact match	Sept-îles, QC, CanadaHQ recorded Sep 19, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 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 “underwater construction firms”. 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 85 underwater construction firms based in Canada

See the full list, filter by size, metro and specialty, and access 319 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Underwater construction firms based in Canada at a glance

As of Sep 19, 2026

24.2%Verified-email coverage

15.5Average contacts per company

11-50Median size (employees)

7.1%Largest-city concentration · North Vancouver

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 85 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 “underwater construction firms” 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 319 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 September 19, 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 “underwater construction firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many underwater construction firms are there based in Canada?

RevenueBase identified 85 company matches for underwater construction firms associated with Canada as of September 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?

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

Which city has the most underwater construction firms?

North Vancouver leads with 6 company records, followed by Victoria (4) and Burnaby (3).

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 319 professional contacts with verified work emails tracked across these 85 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 September 19, 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.