Company lists · Data refreshed September 2026

Top 25 Oil and gas compliance consultants worldwide

Name: Oil and gas compliance consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 7,934 companies tracked

RevenueBase identified 7,934 oil and gas compliance consultants worldwide as of September 2026 and tracks 110,317 professional contacts across them, including 24,458 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.

This list covers oil and gas compliance consultants worldwide, 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. Country and city lists for oil and gas compliance consultants follow the table.

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

7,934Companies

110,317Contacts tracked

24,458Verified emails

0Mobile numbers

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The 25 largest oil and gas compliance consultants worldwide

Ranked by team size

Top 25 of 7,934 oil and gas compliance consultants worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas compliance consultants: 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	Management Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1,001-5,000	4,468 contacts →
	Indirect evidence “Management Solutions is a leading provider of business consulting services for regulated industries.” Source: RevenueBase Database · checked Sep 17, 2026
2	PT Elnusa TBK	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 17, 2026	1,001-5,000	3,932 contacts →
	Strong evidence “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Source: RevenueBase Database · checked Sep 17, 2026
3	Ortec Group	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 17, 2026	10001+	3,436 contacts →
	Indirect evidence “En conjuguant depuis sa création audace et rigueur, le groupe Ortec est devenu aujourd’hui un des leaders des services à l’industrie, l’énergie et l’environnement.” Source: RevenueBase Database · checked Sep 17, 2026
4	Vulcain Engineering Group	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 17, 2026	5,001-10,000	1,496 contacts →
	Indirect evidence “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Source: RevenueBase Database · checked Sep 17, 2026
5	PMI	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	n/a	1,308 contacts →
	Indirect evidence “Training and Development Solutions” Source: RevenueBase Database · checked Sep 17, 2026
6	Zuhair Fayez	Strong evidence	Riyadh, Saudi ArabiaHQ checked Sep 17, 2026	1,001-5,000	1,113 contacts →
	Strong evidence “Zuhair Fayez stands as the region's foremost engineering and consulting firm, renowned for our innovative approach in architecture, project management, and oil and gas services.” Source: RevenueBase Database · checked Sep 17, 2026
7	Barr Engineering CO	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,088 contacts →
	Indirect evidence “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: RevenueBase Database · checked Sep 17, 2026
8	CEDA	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	1,001-5,000	970 contacts →
	Indirect evidence “In a complex and ever-changing world, we’re the ones who get it done.” Source: RevenueBase Database · checked Sep 17, 2026
9	Pares&alvarez	Indirect evidence	Santiago, ChileHQ checked Sep 17, 2026	501-1,000	807 contacts →
	Indirect evidence “We are Pares & Alvarez, our extensive experience and the recognition of our clients makes us one of the leading Engineering Companies in environmental, consulting, engineering and…” Source: RevenueBase Database · checked Sep 17, 2026
10	Pioneer Energy Services	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	770 contacts →
	Indirect evidence “Pioneer Energy Services is now Patterson-UTI” Source: RevenueBase Database · checked Sep 17, 2026
11	EDG	Indirect evidence	Metairie, LA, United StatesHQ checked Sep 17, 2026	501-1,000	700 contacts →
	Indirect evidence “EDG Inc.” Source: RevenueBase Database · checked Sep 17, 2026
12	Antea Group USA	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	658 contacts →
	Indirect evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 17, 2026
13	KBR Granherne	Partial evidence	Leatherhead, United KingdomHQ checked Sep 17, 2026	501-1,000	648 contacts →
	Partial evidence “KBR Consulting is one of the world's foremost engineering consultancies specializing in the hydrocarbon and energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Consultec International INC	Strong evidence	Miami, FL, United StatesHQ checked Sep 17, 2026	501-1,000	580 contacts →
	Strong evidence “Somos una empresa multinacional líder en servicios de Consultoría de Oil & Gas, IT, Ingeniería, Recursos Humanos, Head Hunter y Proyectos” Source: RevenueBase Database · checked Sep 17, 2026
15	Applied Consultants	Partial evidence	Longview, TX, United StatesHQ checked Sep 17, 2026	501-1,000	578 contacts →
	Partial evidence “Since 1991, Applied Consultants Inc.” Source: RevenueBase Database · checked Sep 17, 2026
16	Island Operating Company	Strong evidence	Scott, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	570 contacts →
	Strong evidence “Improving efficiency and reducing costs, all while meeting safety requirements, is the challenge faced by every operator in the oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
17	PT Solusi Energy Nusantara	Partial evidence	IndonesiaHQ checked Sep 17, 2026	501-1,000	563 contacts →
	Partial evidence “PT Solusi Energy Nusantara (SENA) is affiliation of PGN Group, a reputable company which has a core business in natural gas distribution and transmission.” Source: RevenueBase Database · checked Sep 17, 2026
18	ACV Tecline Engenharia Ltda	Indirect evidence	Curitiba, BrazilHQ checked Sep 17, 2026	501-1,000	557 contacts →
	Indirect evidence “A ACV Tecline é uma empresa especializada na prestação de serviços voltados, principalmente, para empresas do setor de energia, com destaque para as áreas de petróleo e gás.” Source: RevenueBase Database · checked Sep 17, 2026
19	CTA Engenharia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 17, 2026	201-500	540 contacts →
	Indirect evidence “A CTA foi criada em 1995, em Belo Horizonte Minas Gerais, ampliando sua atividade e posicionando sua sede no estado do Rio de Janeiro em Duque de Caxias, próximo ao Pólo…” Source: RevenueBase Database · checked Sep 17, 2026
20	Sete Soluções E Tecnologia Ambiental	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 17, 2026	501-1,000	448 contacts →
	Indirect evidence “Somos uma das maiores consultorias em meio ambiente do Brasil, fundada em 1997, contando, hoje, com uma equipe técnica multidisciplinar permanente, que congrega profissionais das…” Source: RevenueBase Database · checked Sep 17, 2026
21	Groundwater & Environmental Services, INC	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 17, 2026	201-500	447 contacts →
	Indirect evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 17, 2026
22	Sidvin Energy Engineering	Strong evidence	Bangalore, IndiaHQ checked Sep 17, 2026	201-500	441 contacts →
	Strong evidence “SIDVIN, a customer focused Engineering Service provider for Oil & Gas, Petrochemical & Process Industry has been delivering exacting solutions through its innovative, unleashing…” Source: RevenueBase Database · checked Sep 17, 2026
23	ROUX	Indirect evidence	Islandia, NY, United StatesHQ checked Sep 17, 2026	201-500	433 contacts →
	Indirect evidence “Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.” Source: RevenueBase Database · checked Sep 17, 2026
24	Muscat Engineering Consultancy LLC	Partial evidence	Bowsher, OmanHQ checked Sep 17, 2026	501-1,000	409 contacts →
	Partial evidence “MEC, a leading engineering and project management consultancy, offers quality-driven technical expertise and customized tailor-fit solutions to our clients from the idea inception…” Source: RevenueBase Database · checked Sep 17, 2026
25	MES	Strong evidence	Leatherhead, United KingdomHQ checked Sep 17, 2026	201-500	403 contacts →
	Strong evidence “Monaco Engineering Solutions (MES) is a specialised technical consultancy with a focus in the Oil & Gas, Petrochemical and Refining, Renewable & Clean Energy, Chemical…” 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: oil and gas compliance consultants. 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 oil and gas compliance consultants.
Partial evidence: Its own public description names part of oil and gas compliance consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas compliance consultants. 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 7,934 oil and gas compliance consultants worldwide

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Oil and gas compliance consultants worldwide at a glance

As of Sep 17, 2026

22.2%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

4,729

11-50

2,303

51-200

650

201-500

153

501-1,000

1,001-5,000

5,001-10,000

10001+

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 oil and gas compliance consultants, 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.
Coverage: 30 countries, largest first: the United States, Brazil, Canada, Italy, the United Kingdom, Mexico, Argentina, Peru, India, Nigeria and 20 more. Country and city lists for oil and gas compliance consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas compliance consultants”. 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 oil and gas compliance consultants), 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 oil and gas compliance consultants, and records with no verified work email.
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, 24,458 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.

Oil and gas compliance consultants by location

41 lists · largest first

Every Oil and gas compliance consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 oil and gas compliance consultants, 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 oil and gas compliance consultants are there worldwide?

RevenueBase identified 7,934 oil and gas compliance consultants worldwide 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?

Management Solutions, headquartered in Madrid, tops this list with the largest team on record.

Which country has the most oil and gas compliance consultants?

The United States leads with 2,128 companies, followed by Brazil (1,408) and Canada (552). Every oil and gas compliance consultants list by country and city is linked on this page.

Which city has the most oil and gas compliance consultants?

Houston leads with 257 headquartered companies, followed by Calgary (211) and Sao Paulo (152).

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 24,458 verified decision-maker contacts tracked across these 7,934 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.