Company lists · Data refreshed September 2026

Top 25 Oil and gas regulatory consultants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 5,064 companies tracked

RevenueBase identified 5,064 oil and gas regulatory consultants worldwide as of September 2026 and tracks 60,622 professional contacts across them, including 13,791 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 regulatory 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 regulatory 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

5,064Companies

60,622Contacts tracked

13,791Verified emails

0Mobile numbers

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The 25 largest oil and gas regulatory consultants worldwide

Ranked by team size

Top 25 of 5,064 oil and gas regulatory 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 regulatory 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	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
2	AGR	Partial evidence	Oslo, NorwayHQ checked Sep 17, 2026	501-1,000	768 contacts →
	Partial evidence “AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…” Source: RevenueBase Database · checked Sep 17, 2026
3	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
4	EMEC	Strong evidence	Cairo, EgyptHQ checked Sep 17, 2026	501-1,000	669 contacts →
	Strong evidence “EMEC is a regional oil and gas services company built on more than four decades of operational experience, regional insight, and deep technical expertise.” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	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
7	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
8	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
9	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
10	TR Engineering Consultancy LLC A Tecnicas Reunidas Group Of Companies	Partial evidence	Alkhuwair, OmanHQ checked Sep 17, 2026	201-500	528 contacts →
	Partial evidence “TR Engineering Consultancy LLC, TRE, a member of the Tecnicas Reunidas Group, with a core business focussed on feasibility studies, front end and detailed engineering for upstream…” Source: RevenueBase Database · checked Sep 17, 2026
11	Enervest, LTD	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	424 contacts →
	Strong evidence “EnerVest is a top-tier, low-cost oil and natural gas operating company.” Source: RevenueBase Database · checked Sep 17, 2026
12	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
13	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
14	Neo2	Strong evidence	Levallois-perret, FranceHQ checked Sep 17, 2026	501-1,000	390 contacts →
	Strong evidence “NEO2 is an Engineering Consultancy and Resource Provider active in the Oil & Gas, Water Treatment & Desalination, and Power Generation industries.” Source: RevenueBase Database · checked Sep 17, 2026
15	Gestiona Consultores	Indirect evidence	Santiago, ChileHQ checked Sep 17, 2026	201-500	375 contacts →
	Indirect evidence “Somos un equipo consolidado y multidisciplinario de profesionales con amplia experiencia en la gestión para el cumplimiento normativo de proyectos de inversión.” Source: RevenueBase Database · checked Sep 17, 2026
16	Petrocil Engineers And Consultants Pvt. LTD	Partial evidence	Thiruvananthapuram, IndiaHQ checked Sep 17, 2026	201-500	333 contacts →
	Partial evidence “Petrocil Engineers & Consultants Pvt.” Source: RevenueBase Database · checked Sep 17, 2026
17	DNV - OIL & GAS	Strong evidence	Høvik, NorwayHQ checked Sep 17, 2026	1,001-5,000	332 contacts →
	Strong evidence “DNV’s Oil & Gas business and GL Noble Denton have become DNV GL - Oil & Gas.” Source: RevenueBase Database · checked Sep 17, 2026
18	Resonance Energy Private Limited	Partial evidence	IndiaHQ checked Sep 17, 2026	501-1,000	275 contacts →
	Partial evidence “Global gas and power markets are expanding fast and becoming increasingly integrated and complex - and the need for market intelligence and informed advice based on deep industry…” Source: RevenueBase Database · checked Sep 17, 2026
19	Crosby Energy Services	Indirect evidence	Cut Off, LA, United StatesHQ checked Sep 17, 2026	201-500	272 contacts →
	Indirect evidence “Founded as C&D Wireline in 1968, with C&D Production Specialist joining the business in 1993, today Crosby Energy Services is a certified Women’s Business Enterprise National…” Source: RevenueBase Database · checked Sep 17, 2026
20	Jbs&g	Partial evidence	Sydney, AustraliaHQ checked Sep 17, 2026	201-500	262 contacts →
	Partial evidence “Established in 1996, JBS & G is one of Australia’s leading environmental consultancies with offices in Sydney, Melbourne, Perth, Adelaide, Brisbane, Canberra, Darwin, Wollongong…” Source: RevenueBase Database · checked Sep 17, 2026
21	TJ Inspection, INC	Strong evidence	Oklahoma City, OK, United StatesHQ checked Sep 17, 2026	201-500	262 contacts →
	Strong evidence “Setting the Standard for Premier Inspection Services in the Oil & Gas Industry through our Dedication to Tradition / Talent / Technology / Teamwork TJ Inspection provides the…” Source: RevenueBase Database · checked Sep 17, 2026
22	M&h	Strong evidence	Spring, TX, United StatesHQ checked Sep 17, 2026	201-500	253 contacts →
	Strong evidence “For more than 40 years, M&H has been a trusted source for oil & gas consulting services that maximize value for clients.” Source: RevenueBase Database · checked Sep 17, 2026
23	AL Haditha Energy Saoc	Indirect evidence	Muscat, OmanHQ checked Sep 17, 2026	1,001-5,000	241 contacts →
	Indirect evidence “Al Haditha Energy S.A.O.C is an Omani Contracting Company established in 2011, held by around 2600 community shareholders with a share capital of OMR 5.5 Million, catering its…” Source: RevenueBase Database · checked Sep 17, 2026
24	PT Singgar Mulia	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 17, 2026	501-1,000	235 contacts →
	Strong evidence “Pt singgar mulia, engineering consultant in oil, gas and energy industry” Source: RevenueBase Database · checked Sep 17, 2026
25	Tanknology	Indirect evidence	Austin, TX, United StatesHQ checked Sep 17, 2026	201-500	232 contacts →
	Indirect evidence “Tanknology is the world's largest provider of tank testing and environmental compliance services for petroleum systems.” 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 regulatory 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 regulatory consultants.
Partial evidence: Its own public description names part of oil and gas regulatory 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 regulatory 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 5,064 oil and gas regulatory consultants worldwide

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Oil and gas regulatory consultants worldwide at a glance

As of Sep 17, 2026

22.7%Verified-email coverage

12.0Average contacts per company

1-10Median size (employees)

5.1%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

2,839

11-50

1,545

51-200

506

201-500

105

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 regulatory 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: 27 countries, largest first: the United States, Brazil, Canada, the United Kingdom, Nigeria, India, Mexico, Italy, Argentina, Australia and 17 more. Country and city lists for oil and gas regulatory consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas regulatory 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 regulatory 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 regulatory 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, 13,791 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 regulatory consultants by location

35 lists · largest first

Every Oil and gas regulatory 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 regulatory 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 regulatory consultants are there worldwide?

RevenueBase identified 5,064 oil and gas regulatory 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?

Zuhair Fayez, headquartered in Riyadh, tops this list with the largest team on record.

Which country has the most oil and gas regulatory consultants?

The United States leads with 1,605 companies, followed by Brazil (555) and Canada (414). Every oil and gas regulatory consultants list by country and city is linked on this page.

Which city has the most oil and gas regulatory consultants?

Houston leads with 257 headquartered companies, followed by Calgary (202) and London (68).

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 13,791 verified decision-maker contacts tracked across these 5,064 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.