Company lists · Data refreshed November 2026

Top 25 Fossil fuel consultants worldwide

Name: Fossil fuel consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 10,953 companies tracked

RevenueBase identified 10,953 company matches for fossil fuel consultants worldwide as of November 2026 and tracks 358,779 professional contacts across them, including 93,403 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for fossil fuel 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 November 6, 2026. Country and city lists for fossil fuel 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 Nov 6, 2026 How this list was built

10,953Companies

358,779Contacts tracked

93,403Verified emails

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The 25 largest fossil fuel consultants worldwide

Ranked by team size

Top 25 of 10,953 company matches for fossil fuel consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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, United StatesHQ recorded Nov 6, 2026	10001+	58,281 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Worley	Exact match	Sydney, AustraliaHQ recorded Nov 6, 2026	10001+	35,481 contacts →
	Exact match “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	WOOD	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	10001+	16,375 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 · Nov 6, 2026 · View company records in RevenueBase
4	Management Solutions	Exact match	Madrid, SpainHQ recorded Nov 6, 2026	1,001-5,000	4,730 contacts →
	Exact match “Management Solutions is a leading provider of business consulting services for regulated industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Nov 6, 2026	10001+	3,602 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 · Nov 6, 2026 · View company records in RevenueBase
6	Golder	Exact match	Las Condes, CanadaHQ recorded Nov 6, 2026	5,001-10,000	3,239 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,991 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 · Nov 6, 2026 · View company records in RevenueBase
8	Langan Engineering & Environmental Services	Exact match	Parsippany, TN, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,492 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Nov 6, 2026	1,001-5,000	2,428 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	J.S. Held LLC	Exact match	Jericho, NY, PalestineHQ recorded Nov 6, 2026	1,001-5,000	2,131 contacts →
	Exact match “J.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Aarvi Encon	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	5,001-10,000	1,982 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 · Nov 6, 2026 · View company records in RevenueBase
12	Englobe	Exact match	Québec, ON, CanadaHQ recorded Nov 6, 2026	1,001-5,000	1,936 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 · Nov 6, 2026 · View company records in RevenueBase
13	TGS	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,926 contacts →
	Exact match “TGS provides advanced data and intelligence to companies active in the energy sector.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	RENCO	Exact match	Pesaro, ItalyHQ recorded Nov 6, 2026	1,001-5,000	1,722 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 · Nov 6, 2026 · View company records in RevenueBase
15	Vulcain Engineering Group	Exact match	Neuilly-sur-seine, FranceHQ recorded Nov 6, 2026	5,001-10,000	1,705 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 · Nov 6, 2026 · View company records in RevenueBase
16	Exponent	Exact match	Menlo Park, FL, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,679 contacts →
	Exact match “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,561 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 · Nov 6, 2026 · View company records in RevenueBase
18	Partner Engineering & Science, INC	Exact match	Torrance, WA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,481 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Knight Piesold	Exact match	Belvedere, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,378 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm delivering specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Gulf Companies	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,165 contacts →
	Exact match “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Zuhair Fayez	Exact match	Riyadh, Saudi ArabiaHQ recorded Nov 6, 2026	1,001-5,000	1,156 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 · Nov 6, 2026 · View company records in RevenueBase
22	Barr Engineering CO	Exact match	Minneapolis, NV, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,146 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Penspen	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,100 contacts →
	Exact match “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Klohn Crippen Berger	Exact match	Vancouver, NB, CanadaHQ recorded Nov 6, 2026	501-1,000	909 contacts →
	Exact match “KCB is a global engineering, geosciences, and environmental consulting firm driven by Passion, Integrity and a commitment to Excellence.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Capco Energy	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	880 contacts →
	Exact match “For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Recorded in the RevenueBase company graph · Nov 6, 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 “fossil fuel 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 10,953 fossil fuel consultants worldwide

See the full list, filter by size, metro and specialty, and access 93,403 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Fossil fuel consultants worldwide at a glance

As of Nov 6, 2026

26.0%Verified-email coverage

32.8Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · Houston

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

6,216

11-50

3,135

51-200

1,073

201-500

255

501-1,000

107

1,001-5,000

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 fossil fuel consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “fossil fuel 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 93,403 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 November 6, 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.

Fossil fuel consultants by location

63 lists · largest first

Every Fossil fuel 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 “fossil fuel consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many fossil fuel consultants are there worldwide?

RevenueBase identified 10,953 company matches for fossil fuel consultants worldwide as of November 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 fossil fuel consultants?

The United States leads with 2,055 companies, followed by Brazil (711) and Canada (630). Every fossil fuel consultants list by country and city is linked on this page.

Which city has the most fossil fuel consultants?

Houston leads with 407 company records, followed by Calgary (266) and London (206).

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 93,403 professional contacts with verified work emails tracked across these 10,953 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 November 6, 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.