Company lists · Data refreshed September 2026

Top 25 Oil and gas consulting companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 8,719 companies tracked

RevenueBase identified 8,719 company matches for oil and gas consulting companies worldwide as of September 2026 and tracks 264,007 professional contacts across them, including 46,603 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 consulting companies 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 September 21, 2026. Country and city lists for oil and gas consulting companies 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 Sep 21, 2026 How this list was built

8,719Companies

264,007Contacts tracked

46,603Verified emails

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The 25 largest oil and gas consulting companies worldwide

Ranked by team size

Top 25 of 8,719 company matches for oil and gas consulting companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 Sep 21, 2026	10001+	53,380 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Sep 21, 2026	10001+	15,774 contacts →
	Exact match “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 21, 2026	1,001-5,000	3,932 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 · Sep 21, 2026 · View company records in RevenueBase
4	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,755 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 · Sep 21, 2026 · View company records in RevenueBase
5	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 21, 2026	1,001-5,000	2,249 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 · Sep 21, 2026 · View company records in RevenueBase
6	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	5,001-10,000	2,215 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Sinopec International Petroleum Service Corporation	Exact match	北京市, ChinaHQ recorded Sep 21, 2026	10001+	1,952 contacts →
	Exact match “Sinopec International Petroleum Service Corporation SSC” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Aarvi Encon	Exact match	Mumbai, IndiaHQ recorded Sep 21, 2026	5,001-10,000	1,890 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 · Sep 21, 2026 · View company records in RevenueBase
9	TGS	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,775 contacts →
	Exact match “TGS provides advanced data and intelligence to companies active in the energy sector.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Tp-Otc	Exact match	Çankaya, TürkiyeHQ recorded Sep 21, 2026	501-1,000	1,501 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 · Sep 21, 2026 · View company records in RevenueBase
11	Core Laboratories	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,500 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 · Sep 21, 2026 · View company records in RevenueBase
12	RENCO	Exact match	Pesaro, ItalyHQ recorded Sep 21, 2026	1,001-5,000	1,494 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 · Sep 21, 2026 · View company records in RevenueBase
13	ANTON	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 21, 2026	5,001-10,000	1,407 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 · Sep 21, 2026 · View company records in RevenueBase
14	Cudd Energy Services	Exact match	The Woodlands, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,285 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 · Sep 21, 2026 · View company records in RevenueBase
15	Waha OIL Company	Exact match	LibyaHQ recorded Sep 21, 2026	1,001-5,000	1,282 contacts →
	Exact match “oil and gas” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Abraj Energy Services	Exact match	Muscat, OmanHQ recorded Sep 21, 2026	1,001-5,000	1,244 contacts →
	Exact match “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	AL Turki Enterprises L.L.C	Exact match	United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,226 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 · Sep 21, 2026 · View company records in RevenueBase
18	Hunting	Exact match	London, United KingdomHQ recorded Sep 21, 2026	1,001-5,000	1,211 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 · Sep 21, 2026 · View company records in RevenueBase
19	TGS	Exact match	Comuna 1, ArgentinaHQ recorded Sep 21, 2026	1,001-5,000	1,159 contacts →
	Exact match “Somos la compañía de energía lider en la prestación de servicios integrados en la industria Oil & Gas Nuestros servicios y soluciones permiten integran toda la cadena de valor del…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Zuhair Fayez	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 21, 2026	1,001-5,000	1,113 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Madina WLL	Exact match	Doha, QatarHQ recorded Sep 21, 2026	1,001-5,000	1,108 contacts →
	Exact match “MADINA GROUP comprises of 5 standalone companies- Madina Group W.L.L, Qatar International Safety Centre, Qatar Inspection Services, Severn Glocon Qatar and Madina Oryx Engineering…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Queiroz Galvão Óleo E GÁS S.A	Exact match	BrazilHQ recorded Sep 21, 2026	1,001-5,000	1,069 contacts →
	Exact match “A Queiroz Galvão Óleo e Gás (QGOG) é a maior companhia privada de prestação de serviços de perfuração e produção do Brasil.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Emdad Group	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Sep 21, 2026	1,001-5,000	1,027 contacts →
	Exact match “Emdad LLC is a leading UAE-based service provider in the Oil & Gas sector, delivering integrated solutions that support upstream and downstream operations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Sertecpet	Exact match	Quito - El Coca, EcuadorHQ recorded Sep 21, 2026	1,001-5,000	1,021 contacts →
	Exact match “SERTECPET® is a multinational company specialized in providing worldwide Integrated Energy Solutions with state-of-the-art technology.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Carso Perforación	Exact match	United StatesHQ recorded Sep 21, 2026	1,001-5,000	994 contacts →
	Exact match “Empresa líder en el Sector Petrolero, con presencia a Nivel Nacional, principales clientes PEMEX Y CFE, con servicios como perforación de pozos terrestres, Marinos, Geotérmicos…” Recorded in the RevenueBase company graph · Sep 21, 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 consulting companies”. 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 8,719 oil and gas consulting companies worldwide

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Oil and gas consulting companies worldwide at a glance

As of Sep 21, 2026

17.7%Verified-email coverage

30.3Average contacts per company

11-50Median size (employees)

5.3%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

3,996

11-50

2,695

51-200

1,279

201-500

404

501-1,000

142

1,001-5,000

127

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 consulting companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas consulting companies” 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 46,603 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 September 21, 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 consulting companies by location

45 lists · largest first

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

How many oil and gas consulting companies are there worldwide?

RevenueBase identified 8,719 company matches for oil and gas consulting companies worldwide as of September 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 consulting companies?

The United States leads with 1,743 companies, followed by the United Kingdom (596) and Nigeria (578). Every oil and gas consulting companies list by country and city is linked on this page.

Which city has the most oil and gas consulting companies?

Houston leads with 461 company records, followed by Calgary (245) and Port Harcourt (157).

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 46,603 professional contacts with verified work emails tracked across these 8,719 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 September 21, 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.