Company lists · Data refreshed September 2026

Top 25 Underwater construction firms based in Brazil

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 123 companies tracked

RevenueBase identified 123 underwater construction firms headquartered in Brazil as of September 2026 and tracks 6,533 professional contacts across them, including 1,529 with verified work emails. Rio De Janeiro is the largest hub.

This list covers underwater construction firms headquartered in Brazil, 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 19, 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 19, 2026 86% judged on-target in blind review

123Companies

6,533Contacts tracked

1,529Verified emails

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The 25 largest underwater construction firms based in Brazil

Ranked by team size

Top 25 of 123 underwater construction firms based in Brazil, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to underwater construction firms: 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	Grupo CBO	Indirect evidence	Niterói, BrazilHQ checked Sep 19, 2026	1,001-5,000	1,847 contacts →
	Indirect evidence “O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.” Source: RevenueBase Database · checked Sep 19, 2026
2	BELOV	Indirect evidence	Matriz, BrazilHQ checked Sep 19, 2026	1,001-5,000	1,108 contacts →
	Indirect evidence “A Belov Engenharia foi criada em 1981 em Salvador/BA, pelo engenheiro Aleixo Belov, que à época desfrutava de uma experiência de 15 anos de participação na condução das maiores…” Source: RevenueBase Database · checked Sep 19, 2026
3	Construtora Vale Verde S A	Indirect evidence	Itabira, BrazilHQ checked Sep 19, 2026	1,001-5,000	555 contacts →
	Indirect evidence “A Construtora Vale Verde é uma empresa inovadora que concentra a sua expertise na atuação em soluções para construção civil pesada com serviços de dragagem convencional e…” Source: RevenueBase Database · checked Sep 19, 2026
4	CTC Infra	Partial evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	51-200	320 contacts →
	Partial evidence “Designed to become a major Brazilian construction company, CTC Infra was born in still under the name Constremac, shortly after acquiring Copabo Construções, a company belonging…” Source: RevenueBase Database · checked Sep 19, 2026
5	Granenergia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	201-500	304 contacts →
	Indirect evidence “Founded in 2011 by the Gradin family, GranEnergia is an Integrated Offshore Energy Services Company, headquartered in Brazil and the Netherlands.” Source: RevenueBase Database · checked Sep 19, 2026
6	Aasj Serviços Industriais	Indirect evidence	Macaé, BrazilHQ checked Sep 19, 2026	501-1,000	139 contacts →
	Indirect evidence “Fundada em 2012, a AASJ Manutenção e Reparo Offshore foi idealizada para apresentar ao mercado uma solução integrada em execução de grandes projetos portuários, visando a…” Source: RevenueBase Database · checked Sep 19, 2026
7	OSX	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	11-50	105 contacts →
	Indirect evidence “Somos a OSX, empresa do Grupo EBX que atua na indústria naval e offshore, oferecendo soluções integradas de engenharia, construção, fretamento, e serviços de Operação e Manutenção…” Source: RevenueBase Database · checked Sep 19, 2026
8	Dratec Engenharia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	51-200	97 contacts →
	Indirect evidence “A Dratec Engenharia Ltda.” Source: RevenueBase Database · checked Sep 19, 2026
9	Beconal	Indirect evidence	Manaus, BrazilHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
10	Simeros Technologies	Indirect evidence	Cachoeirinha, BrazilHQ checked Sep 19, 2026	51-200	85 contacts →
	Indirect evidence “SIMEROS is a Brazilian engineering company specialized in developing high-performance solutions for the subsea oil and gas sector, with a focus on SURF (Subsea Umbilicals, Risers…” Source: RevenueBase Database · checked Sep 19, 2026
11	RCS Subaquatica	Indirect evidence	Araruama, BrazilHQ checked Sep 19, 2026	11-50	67 contacts →
	Indirect evidence “A RCS Subaquática é uma empresa de mergulho e soluções subaquáticas, criada por engenheiros, técnicos e mergulhadores preocupados com a segurança nas operações de mergulho e com a…” Source: RevenueBase Database · checked Sep 19, 2026
12	BRS Robótica Submarina	Indirect evidence	Macaé, BrazilHQ checked Sep 19, 2026	11-50	47 contacts →
	Indirect evidence “Founded in 2017, BRS Robótica Submarina operates within the heart of Brazil's thriving Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 19, 2026
13	Underocean Serviços Maritimos	Partial evidence	Macaé, BrazilHQ checked Sep 19, 2026	51-200	35 contacts →
	Partial evidence “UNDEROCEAN operates in the Oil & Gas sector offering offshore project management services and ROV solutions, including equipment rental, maintenance, underwater inspection…” Source: RevenueBase Database · checked Sep 19, 2026
14	Sea1 Offshore DO Brasil S.A	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	201-500	33 contacts →
	Indirect evidence “A Sea1 Offshore do Brasil S.A.” Source: RevenueBase Database · checked Sep 19, 2026
15	Deep Blue Serviços Submarinos	Indirect evidence	Angra Dos Reis, BrazilHQ checked Sep 19, 2026	51-200	28 contacts →
	Indirect evidence “Com mais de 35 anos de experiência, somos uma empresa especializada em mergulho profissional e serviços subaquáticos, oferecendo soluções seguras, eficientes e de alta qualidade.” Source: RevenueBase Database · checked Sep 19, 2026
16	Oceanserv	Partial evidence	Rio Das Ostras, BrazilHQ checked Sep 19, 2026	11-50	21 contacts →
	Partial evidence “Estabilished in 2010 in Brazil, Oceanserv is an Underwater Solution Company, specialized in services to the Oil and Gas industry.” Source: RevenueBase Database · checked Sep 19, 2026
17	Boskalis DO Brasil	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “Desde nossa fundação em 1910, adquirimos um histórico de execução de projetos de alta complexidade, sempre concluídos com êxito através da estreita colaboração com nossos clientes.” Source: RevenueBase Database · checked Sep 19, 2026
18	Noir - Naval Ocean	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “Empresa de Engenharia localizada no Rio de Janeiro/RJ.” Source: RevenueBase Database · checked Sep 19, 2026
19	Oceanorte Engenharia Naval	Indirect evidence	Belém, BrazilHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “Formado pelas empresas OCEANORTE CONSTRUÇÕES, OCEANORTE ENGENHARIA E LOGÍSTICA e OCEANORTE ESTALEIROS, o GRUPO OCEANORTE atua nos segmentos da Engenharia Naval, Civil e Portuária.” Source: RevenueBase Database · checked Sep 19, 2026
20	Aquasub Mergulho Ltda	Indirect evidence	Maricá, BrazilHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Especializada em inspeção, manutenção e reparos subaquáticos, com expertise em pesquisas, assessorias, planejamentos e execução de projetos.” Source: RevenueBase Database · checked Sep 19, 2026
21	Grupo Mecatec	Indirect evidence	São Sebastião, BrazilHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Somos uma empresa especializada em serviços subaquáticos, manutenção industrial, naval e offshore.” Source: RevenueBase Database · checked Sep 19, 2026
22	Bravocean Offshore Services	Indirect evidence	Florianópolis, BrazilHQ checked Sep 19, 2026	1-10	10 contacts →
	Indirect evidence “Bravocean Offshore Services ltda.” Source: RevenueBase Database · checked Sep 19, 2026
23	Iron Marine	Indirect evidence	Santos, BrazilHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Iron Marine is a maritime company that works with ship repair and dive solutions based out of Rua São Francisco 306 Santos, São Paulo, Brazil.” Source: RevenueBase Database · checked Sep 19, 2026
24	Blue Amazon Shipping Projects S.A	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “Company specializing in offshore projects, submarine launches and maritime transport.” Source: RevenueBase Database · checked Sep 19, 2026
25	Cabomar Serviços	Indirect evidence	Rio Das Ostras, BrazilHQ checked Sep 19, 2026	11-50	8 contacts →
	Indirect evidence “ARRAIAL DO CABO/RJ – MATRIZ: Fundada em 15/07/1989, atualmente instalada em uma área de m² aproximadamente, totalmente coberta, a CABOMAR SERVIÇOS vem atuando há mais de 24 anos…” Source: RevenueBase Database · checked Sep 19, 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: underwater construction firms. 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 underwater construction firms.
Partial evidence: Its own public description names part of underwater construction firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name underwater construction firms. 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 123 underwater construction firms based in Brazil

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Underwater construction firms based in Brazil at a glance

As of Sep 19, 2026

23.4%Verified-email coverage

53.1Average contacts per company

11-50Median size (employees)

17.9%Largest-city concentration · Rio De Janeiro

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Brazil, so it is reported there. Company counts and contact totals on this page are exact for Brazil, over 123 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 underwater construction firms, 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 Brazil whose own description of what they do matches “underwater construction firms”. 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 underwater construction firms), 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 underwater construction firms, and records with no verified work email. Companies headquartered outside Brazil 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, 1,529 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 19, 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 underwater construction firms, 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 underwater construction firms are there based in Brazil?

RevenueBase identified 123 underwater construction firms headquartered in Brazil 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?

Grupo CBO, headquartered in Niteroi, tops this list with the largest team on record.

Which city has the most underwater construction firms?

Rio De Janeiro leads with 22 headquartered companies, followed by Niteroi (9) and Sao Paulo (9).

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 1,529 verified decision-maker contacts tracked across these 123 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 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 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.