Company lists · Data refreshed September 2026
Top 25 Commercial diving training organizations based in the United States
RevenueBase identified 694 commercial diving training organizations headquartered in the United States as of September 2026 and tracks 9,559 professional contacts across them, including 951 with verified work emails. Seattle is the largest hub.
This list covers commercial diving training organizations headquartered in the United States, 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.
The 25 largest commercial diving training organizations based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,423 contacts → | ||||
Partial evidence “PADI® (Professional Association of Diving Instructors®) is the world’s largest ocean exploration and diver organization, operating in 186 countries and territories, with a global…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 236 contacts → | ||||
Indirect evidence “Ballard Marine Construction (Ballard) is a specialty marine and underwater contractor.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 217 contacts → | ||||
Indirect evidence “Global is a leader in the marine services industry with decades of experience managing complex, critical and technical projects in and around the water.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 190 contacts → | ||||
Partial evidence “Since 1969, Underwater Construction Corporation (UCC) has been a leading provider of underwater services to commercial and government facilities.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 183 contacts → | ||||
Indirect evidence “The National Association of Underwater Instructors (NAUI Worldwide) is a premier recreational dive certification and membership organization headquartered in Riverview, Florida…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 176 contacts → | ||||
Indirect evidence “Welcome to Subsea Global Solutions where EVERY DAY our goal is to deliver unrivaled service.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 170 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 130 contacts → | ||||
Indirect evidence “Diventures was founded in 2009, with one location in Omaha, Nebraska, and has expanded to eighteen locations across twelve states.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 118 contacts → | ||||
Indirect evidence “SUS specializes in underwater marine construction including bridges, dams, pipelines, intakes, outfalls, inspection services, piers and wharfs and other public safety and local…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 109 contacts → | ||||
Strong evidence “Solutions Above & Below the Waterline, Since 1949: Commercial Diving | Marine Construction | Crane Rental & Rigging Maritime Energy Utility Construction Ship Repair Engineering…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 94 contacts → | ||||
Indirect evidence “DEEP is an international ocean engineering and technology company on a mission to make humans aquatic.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 84 contacts → | ||||
Indirect evidence “At Huish Outdoors, we've brought together the Best Brands in Dive to create the leading scuba and immersion technology company in the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 74 contacts → | ||||
Strong evidence “IANTD Is The World's Largest Scuba & Rebreather Diving Training Organization Of Open Water, Nitrox, Enriched Air (EANx), Overhead Environment, Cave, Wreck, Recreational…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 59 contacts → | ||||
Partial evidence “MITAGS is a world-renowned maritime training and simulation center with locations in Baltimore and Seattle.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 55 contacts → | ||||
Indirect evidence “American Marine Corporation is a maritime company based out of Honolulu, HI, United States.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 54 contacts → | ||||
Partial evidence “Global Underwater Explorers (GUE) is a nonprofit organization dedicated to advancing excellence in diving through high-quality education, global collaboration, and exploration.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 48 contacts → | ||||
Partial evidence “Midco Diving is a contracting & marine services company performing professional dive services worldwide.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 45 contacts → | ||||
Partial evidence “Specialty Diving of Louisiana and its sister company, Specialty Offshore, offer underwater marine services to the private and public sectors in conjunction with extensive dive…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 36 contacts → | ||||
Partial evidence “Our Mission: To provide professional and recreational mariners with high quality, affordable, practical training in all subjects related to vessel operations, while meeting or…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 35 contacts → | ||||
Strong evidence “Mainstream Commercial Divers, Inc.(formerly MER Commercial Diving Division) is a full-service commercial diving company, providing decades of quality service.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 31 contacts → | ||||
Indirect evidence “Established in 1969 in Houston, TX, The Ocean Corporation stands as a beacon of unwavering commitment to quality education.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 30 contacts → | ||||
Indirect evidence “Your one stop source for everything underwater.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 28 contacts → | ||||
Indirect evidence “The Sea School is a leading U.S.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 28 contacts → | ||||
Partial evidence “Since 1957, Walker Diving has been providing professional underwater services throughout the northeast-including underwater construction, diving inspection, specialty marine…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 27 contacts → | ||||
Indirect evidence “Force E Scuba Centers is recreational SCUBA company based out of South Florida, United States.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: commercial diving training organizations. 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 commercial diving training organizations.
- Partial evidence
- Its own public description names part of commercial diving training organizations, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name commercial diving training organizations. 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 694 commercial diving training organizations based in the United States
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Commercial diving training organizations based in the United States at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 694 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 commercial diving training organizations, 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 the United States whose own description of what they do matches “commercial diving training organizations”. 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 commercial diving training organizations), 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 commercial diving training organizations, and records with no verified work email. Companies headquartered outside United States 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, 951 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 commercial diving training organizations, 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 commercial diving training organizations are there based in the United States?
RevenueBase identified 694 commercial diving training organizations headquartered in the United States 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?
PADI, headquartered in Rancho Santa Margarita, tops this list with the largest team on record.
Which city has the most commercial diving training organizations?
Seattle leads with 13 headquartered companies, followed by Fort Lauderdale (12) and Houston (11).
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 951 verified decision-maker contacts tracked across these 694 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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Download this list →Related lists
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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.
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