Company lists · Data refreshed November 2026

Top 25 Oil and gas environmental services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 4, 2026 25,754 companies tracked

RevenueBase identified 25,754 company matches for oil and gas environmental services worldwide as of November 2026 and tracks 764,271 professional contacts across them, including 169,770 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 environmental services 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 4, 2026. Country and city lists for oil and gas environmental services 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 4, 2026 How this list was built

25,754Companies

764,271Contacts tracked

169,770Verified emails

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The 25 largest oil and gas environmental services worldwide

Ranked by team size

Top 25 of 25,754 company matches for oil and gas environmental services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 4, 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 4, 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 4, 2026 · View company records in RevenueBase
2	Veolia	Exact match	Aubervilliers, FranceHQ recorded Nov 4, 2026	10001+	33,268 contacts →
	Exact match “Veolia, a global leader in environmental services, works every day to build environmental security for the benefit of public health and the competitiveness of industries and…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
3	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Nov 4, 2026	10001+	16,534 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 · Nov 4, 2026 · View company records in RevenueBase
4	Clean Harbors	Exact match	Norwell, MA, United StatesHQ recorded Nov 4, 2026	10001+	9,552 contacts →
	Exact match “Clean Harbors is North America’s leading provider of environmental and industrial services.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
5	GFL Environmental INC	Exact match	Vaughan, ON, CanadaHQ recorded Nov 4, 2026	10001+	6,452 contacts →
	Exact match “GFL Environmental is the fourth largest diversified environmental services company in North America, providing comprehensive solid waste management services through a strategic…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6	Bilfinger	Exact match	Mannheim, GermanyHQ recorded Nov 4, 2026	10001+	4,349 contacts →
	Exact match “Bilfinger is an international industrial services provider with a vision to be the No.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
7	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Nov 4, 2026	1,001-5,000	4,263 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 · Nov 4, 2026 · View company records in RevenueBase
8	NESR	Exact match	Houston, United StatesHQ recorded Nov 4, 2026	5,001-10,000	3,989 contacts →
	Exact match “National Energy Services Reunited Corp.(NESR) was founded in 2017 as one of the largest national oilfield services providers in the MENA and Asia Pacific regions and was the first…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
9	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Nov 4, 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 4, 2026 · View company records in RevenueBase
10	Golder	Exact match	Las Condes, CanadaHQ recorded Nov 4, 2026	5,001-10,000	3,239 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
11	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 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 4, 2026 · View company records in RevenueBase
12	Safety-Kleen	Exact match	Plano, TX, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,988 contacts →
	Exact match “Safety-Kleen is a leading environmental services company engaged in used oil recycling and refining (EcoPower brand), parts cleaning and other responsible environmental solutions.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13	RE Sustainability Limited	Exact match	Hyderabad, IndiaHQ recorded Nov 4, 2026	10001+	2,692 contacts →
	Exact match “Re is one of Asia’s leading integrated resource management and sustainability solutions companies, turning environmental challenges into sustainable value.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
14	Langan Engineering & Environmental Services	Exact match	Parsippany, TN, United StatesHQ recorded Nov 4, 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 4, 2026 · View company records in RevenueBase
15	Archer	Exact match	Sandnes, NorwayHQ recorded Nov 4, 2026	5,001-10,000	2,455 contacts →
	Exact match “Archer is a company providing drilling and well services to the global energy industry.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
16	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 4, 2026	1,001-5,000	2,408 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 · Nov 4, 2026 · View company records in RevenueBase
17	OCYAN	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 4, 2026	1,001-5,000	2,402 contacts →
	Exact match “A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
18	Taqa Industrialization & Energy Services Company	Exact match	Dhahran, Saudi ArabiaHQ recorded Nov 4, 2026	5,001-10,000	2,351 contacts →
	Exact match “TAQA is an international company that offers leading well solutions for the energy industry and is creating value and opportunity for all its stakeholders.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
19	SAN Antonio Internacional	Exact match	Comuna 1, ArgentinaHQ recorded Nov 4, 2026	1,001-5,000	2,324 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 · Nov 4, 2026 · View company records in RevenueBase
20	Civil & Environmental Consultants, INC	Exact match	Moon Township, MO, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,276 contacts →
	Exact match “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
21	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Nov 4, 2026	n/a	2,268 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22	Sinopec International Petroleum Service Corporation	Exact match	北京市, ChinaHQ recorded Nov 4, 2026	10001+	2,249 contacts →
	Exact match “Sinopec International Petroleum Service Corporation SSC” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
23	Superior Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,119 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 · Nov 4, 2026 · View company records in RevenueBase
24	ZMI Holdings	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Nov 4, 2026	1,001-5,000	2,100 contacts →
	Exact match “ZMI Holdings an ADNOC L&S company THE NEW WAVE Transforming the Offshore Energy Industry An integrated service provider offering unparalleled commitment.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
25	Dietsmann	Exact match	Fontvieille, MonacoHQ recorded Nov 4, 2026	5,001-10,000	2,035 contacts →
	Exact match “Dietsmann is the leading independent specialist in Operation & Maintenance services for continuous-production plant in the oil & gas and power industries with over 40 years of…” Recorded in the RevenueBase company graph · Nov 4, 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 environmental services”. 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 25,754 oil and gas environmental services worldwide

See the full list, filter by size, metro and specialty, and access 169,770 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas environmental services worldwide at a glance

As of Nov 4, 2026

22.2%Verified-email coverage

29.7Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · Houston

Nov 4, 2026Page data refreshed

Companies by employee count

1-10

11,355

11-50

8,483

51-200

3,646

201-500

1,160

501-1,000

407

1,001-5,000

357

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 environmental services are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas environmental services” 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 169,770 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 4, 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 environmental services by location

105 lists · largest first

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

How many oil and gas environmental services are there worldwide?

RevenueBase identified 25,754 company matches for oil and gas environmental services 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 oil and gas environmental services?

The United States leads with 5,660 companies, followed by Brazil (2,584) and Canada (1,235). Every oil and gas environmental services list by country and city is linked on this page.

Which city has the most oil and gas environmental services?

Houston leads with 505 company records, followed by Calgary (325) and Port Harcourt (276).

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 169,770 professional contacts with verified work emails tracked across these 25,754 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 4, 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.