Company lists · Data refreshed September 2026

Top 25 Oil gas consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 15,351 companies tracked

RevenueBase identified 15,351 company matches for oil gas consulting firms worldwide as of September 2026 and tracks 430,848 professional contacts across them, including 84,750 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for oil gas consulting firms 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 gas consulting firms 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

15,351Companies

430,848Contacts tracked

84,750Verified emails

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The 25 largest oil gas consulting firms worldwide

Ranked by team size

Top 25 of 15,351 company matches for oil gas consulting firms 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	WOOD	Exact match	Aberdeen, United KingdomHQ recorded Sep 21, 2026	10001+	26,949 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 · Sep 21, 2026 · View company records in RevenueBase
3	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
4	Bilfinger	Exact match	Mannheim, GermanyHQ recorded Sep 21, 2026	10001+	4,035 contacts →
	Exact match “Bilfinger is an international industrial services provider with a vision to be the No.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	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
6	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Sep 21, 2026	10001+	3,436 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 · Sep 21, 2026 · View company records in RevenueBase
7	دار الرياض DAR AL Riyadh	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 21, 2026	1,001-5,000	2,720 contacts →
	Exact match “Founded in the mid-1970s by Prince Turki bin Abdullah bin Abdulrahman Al Saud, a forward-thinking engineering pioneer, Dar Al Riyadh has evolved into the Kingdom's leading…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Sep 21, 2026	1,001-5,000	2,259 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	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
10	J.S. Held LLC	Exact match	Jericho, NY, PalestineHQ recorded Sep 21, 2026	1,001-5,000	1,954 contacts →
	Exact match “J.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	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
12	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
13	Pt. Surveyor Indonesia	Exact match	IndonesiaHQ recorded Sep 21, 2026	1,001-5,000	1,537 contacts →
	Exact match “Surveyor Indonesia was incepted on 1 August 1991.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Chiyoda Corporation	Exact match	Yokohama, JapanHQ recorded Sep 21, 2026	5,001-10,000	1,514 contacts →
	Exact match “Since its establishment in 1948, Chiyoda's business field has covered the energy sector such as oil and gas industry including energy conservation, and chemicals, environment…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	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
16	Vulcain Engineering Group	Exact match	Neuilly-sur-seine, FranceHQ recorded Sep 21, 2026	5,001-10,000	1,496 contacts →
	Exact match “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	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
18	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
19	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,358 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,290 contacts →
	Exact match “Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	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
22	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
23	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
24	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,231 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	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

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 gas consulting firms”. 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 15,351 oil gas consulting firms worldwide

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Oil gas consulting firms worldwide at a glance

As of Sep 21, 2026

19.7%Verified-email coverage

28.1Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

7,687

11-50

4,560

51-200

1,969

201-500

601

501-1,000

225

1,001-5,000

187

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 gas consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil gas consulting firms” 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 84,750 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 gas consulting firms by location

68 lists · largest first

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

How many oil gas consulting firms are there worldwide?

RevenueBase identified 15,351 company matches for oil gas consulting firms 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 gas consulting firms?

The United States leads with 2,368 companies, followed by the United Kingdom (1,105) and Brazil (756). Every oil gas consulting firms list by country and city is linked on this page.

Which city has the most oil gas consulting firms?

Houston leads with 574 company records, followed by Calgary (321) and London (290).

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 84,750 professional contacts with verified work emails tracked across these 15,351 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.