Company lists · Data refreshed October 2026

Top 25 Oil and gas consultants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 19, 2026 13,217 companies tracked

RevenueBase identified 13,217 company matches for oil and gas consultants worldwide as of October 2026 and tracks 403,290 professional contacts across them, including 66,570 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for oil and gas consultants worldwide, 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 October 19, 2026. Country and city lists for oil and gas consultants follow the table.

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 Oct 19, 2026 How this list was built

13,217Companies

403,290Contacts tracked

66,570Verified emails

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The 25 largest oil and gas consultants worldwide

Ranked by team size

Top 25 of 13,217 company matches for oil and gas consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 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	Halliburton	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	10001+	56,783 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
2	WOOD	Exact match	Aberdeen, United KingdomHQ recorded Oct 19, 2026	10001+	16,351 contacts →
	Exact match “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
3	EXPRO	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	5,001-10,000	6,721 contacts →
	Exact match “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
4	Management Solutions	Exact match	Madrid, SpainHQ recorded Oct 19, 2026	1,001-5,000	4,551 contacts →
	Exact match “Management Solutions is a leading provider of business consulting services for regulated industries.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
5	Bilfinger	Exact match	Mannheim, GermanyHQ recorded Oct 19, 2026	10001+	4,268 contacts →
	Exact match “Bilfinger is an international industrial services provider with a vision to be the No.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Oct 19, 2026	1,001-5,000	4,167 contacts →
	Exact match “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
7	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Oct 19, 2026	10001+	3,504 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	1,001-5,000	2,923 contacts →
	Exact match “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
9	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 19, 2026	1,001-5,000	2,362 contacts →
	Exact match “OiLSERV is a provider of an expanding range of oilfield services, including well logging, well testing, production enhancement, drilling services, surface production management…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
10	SAN Antonio Internacional	Exact match	Comuna 1, ArgentinaHQ recorded Oct 19, 2026	1,001-5,000	2,247 contacts →
	Exact match “Somos la mayor prestadora de servicios de perforación de la Argentina y somos líderes en la prestación de servicios asociados al mantenimiento y optimización de los pozos de…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
11	Sinopec International Petroleum Service Corporation	Exact match	北京市, ChinaHQ recorded Oct 19, 2026	10001+	2,112 contacts →
	Exact match “Sinopec International Petroleum Service Corporation SSC” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12	Superior Energy Services	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	1,001-5,000	2,076 contacts →
	Exact match “For oil & gas exploration and production companies worldwide, Superior Energy Services is an oilfield products and services company with global reach, financial stability and…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
13	Englobe	Exact match	Québec, QC, CanadaHQ recorded Oct 19, 2026	1,001-5,000	1,864 contacts →
	Exact match “Englobe is a leader in the fields of engineering, gesosciences, environmental management, asset integrity and quality management.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14	Aarvi Encon	Exact match	Mumbai, IndiaHQ recorded Oct 19, 2026	5,001-10,000	1,862 contacts →
	Exact match “Aarvi Encon has established it's leadership in providing Engineering Consultancy and Technical Assistance to Oil & Gas, Refinery, Petrochemical, Pipelines, Power & Infrastructure…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
15	Tp-Otc	Exact match	Çankaya, TürkiyeHQ recorded Oct 19, 2026	501-1,000	1,766 contacts →
	Exact match “TP-OTC is established to provide all engineering and technology services for offshore operations in oil and gas industry.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16	Robtstone ME LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 19, 2026	1,001-5,000	1,695 contacts →
	Exact match “At Robt.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
17	Core Laboratories	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,543 contacts →
	Exact match “With over 70 offices in more than 50 countries located in major oil-producing provinces, Core Laboratories provides services to the world's major, national, and independent oil…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18	RENCO	Exact match	Pesaro, ItalyHQ recorded Oct 19, 2026	1,001-5,000	1,534 contacts →
	Exact match “Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
19	ANTON	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 19, 2026	5,001-10,000	1,419 contacts →
	Exact match “Anton Oilfield Services Group (hereinafter as “Anton”) is the world's leading integrated oilfield technology service company that provides clients with a full range of products…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20	Cudd Energy Services	Exact match	The Woodlands, TX, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,329 contacts →
	Exact match “Cudd offers a broad range of technical and specialized oilfield services to companies engaged in the exploration and production of oil and natural gas worldwide.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
21	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Oct 19, 2026	1,001-5,000	1,300 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22	Waha OIL Company	Exact match	LibyaHQ recorded Oct 19, 2026	1,001-5,000	1,283 contacts →
	Exact match “oil and gas” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23	Abraj Energy Services	Exact match	Muscat, OmanHQ recorded Oct 19, 2026	1,001-5,000	1,274 contacts →
	Exact match “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
24	AL Turki Enterprises L.L.C	Exact match	United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,268 contacts →
	Exact match “At Al Turki’s Oil and Gas Division, we carry out multi-disciplined Engineering Design, Procurement and Construction service in the southern region of Oman with our Off-plot…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
25	Hunting	Exact match	London, United KingdomHQ recorded Oct 19, 2026	1,001-5,000	1,264 contacts →
	Exact match “HUNTING is an energy services provider to the world's leading national and international oil and gas companies, manufacturing and distributing products that enable the extraction…” Recorded in the RevenueBase company graph · Oct 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 “oil and gas consultants”. 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 13,217 oil and gas consultants worldwide

See the full list, filter by size, metro and specialty, and access 66,570 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas consultants worldwide at a glance

As of Oct 19, 2026

16.5%Verified-email coverage

30.5Average contacts per company

11-50Median size (employees)

4.1%Largest-city concentration · Houston

Oct 19, 2026Page data refreshed

Companies by employee count

1-10

6,242

11-50

4,086

51-200

1,878

201-500

551

501-1,000

195

1,001-5,000

181

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for oil and gas consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas consultants” 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. 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 66,570 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 October 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.

Oil and gas consultants by location

77 lists · largest first

Every Oil and gas 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 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 “oil and gas consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas consultants are there worldwide?

RevenueBase identified 13,217 company matches for oil and gas consultants worldwide as of October 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?

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

Which country has the most oil and gas consultants?

The United States leads with 2,289 companies, followed by the United Kingdom (890) and Nigeria (627). Every oil and gas consultants list by country and city is linked on this page.

Which city has the most oil and gas consultants?

Houston leads with 547 company records, followed by Calgary (319) and London (210).

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 66,570 professional contacts with verified work emails tracked across these 13,217 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 October 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.