Company lists · Data refreshed November 2026

Top 25 Oil and gas environmental contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 4, 2026 18,569 companies tracked

RevenueBase identified 18,569 company matches for oil and gas environmental contractors worldwide as of November 2026 and tracks 447,459 professional contacts across them, including 96,236 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 contractors 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 contractors 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

18,569Companies

447,459Contacts tracked

96,236Verified emails

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The 25 largest oil and gas environmental contractors worldwide

Ranked by team size

Top 25 of 18,569 company matches for oil and gas environmental contractors 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	Tecnicas Reunidas	Exact match	Madrid, SpainHQ recorded Nov 4, 2026	10001+	11,748 contacts →
	Exact match “TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
2	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
3	Perenco	Exact match	Londres, United KingdomHQ recorded Nov 4, 2026	5,001-10,000	5,669 contacts →
	Exact match “Founded over thirty years ago, Perenco is an independent hydrocarbon producer involved in the entire lifecycle of projects, from exploration to decommissioning.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
4	Bonatti	Exact match	Parma, United StatesHQ recorded Nov 4, 2026	5,001-10,000	5,460 contacts →
	Exact match “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
5	Deme Group	Exact match	Beveren-kruibeke-zwijndrecht, BelgiumHQ recorded Nov 4, 2026	5,001-10,000	4,731 contacts →
	Exact match “DEME (Euronext Brussels: DEME) is a leading contractor in the fields of offshore energy, dredging and marine infrastructure, and environmental remediation.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6	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
7	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
8	ENPPI	Exact match	Nasr City 1, United StatesHQ recorded Nov 4, 2026	1,001-5,000	3,542 contacts →
	Exact match “Enppi is globally recognized as a major engineering, EPC main contractor, and management contractor, with decades of experience in onshore and offshore projects in the oil and…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
9	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
10	Qatar Engineering & Construction Company W.L.L	Exact match	Ras Laffan Industrial City (rlic), QatarHQ recorded Nov 4, 2026	5,001-10,000	2,486 contacts →
	Exact match “Qatar Engineering & Construction Company (Qcon) is the leading National EPC & Maintenance Contractor in the Oil & Gas, Petrochemical, Fertilizer and Power industries.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
11	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
12	Brown & Root Industrial Services, LLC	Exact match	Baton Rouge, LA, United StatesHQ recorded Nov 4, 2026	5,001-10,000	2,075 contacts →
	Exact match “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13	ELFE	Exact match	Macaé, BrazilHQ recorded Nov 4, 2026	1,001-5,000	2,045 contacts →
	Exact match “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
14	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
15	EMC Egyptian Maintenance Company	Exact match	New Cairo, EgyptHQ recorded Nov 4, 2026	5,001-10,000	2,027 contacts →
	Exact match “Since its foundation in 1997, EMC has become a well-known maintenance and modification service provider to major oil, gas and petrochemical companies, pipeline and refinery…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
16	AYTB	Exact match	Jubail Industrial City, Saudi ArabiaHQ recorded Nov 4, 2026	5,001-10,000	2,013 contacts →
	Exact match “AYTB had recognized the Saudi Dream 45 years ago when the Royal Commission for Jubail and Yanbu was set up with a vision to build a huge petrochemical industry to catapult Saudi…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17	Englobe	Exact match	Québec, ON, CanadaHQ recorded Nov 4, 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 4, 2026 · View company records in RevenueBase
18	Robtstone ME LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Nov 4, 2026	1,001-5,000	1,758 contacts →
	Exact match “At Robt.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
19	Vulcain Engineering Group	Exact match	Neuilly-sur-seine, FranceHQ recorded Nov 4, 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 4, 2026 · View company records in RevenueBase
20	Swca Environmental Consultants	Exact match	Phoenix, MA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,695 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
21	Arabian Pipeline & Services Co. Ltd. Anabeeb	Exact match	Dammam, Saudi ArabiaHQ recorded Nov 4, 2026	5,001-10,000	1,671 contacts →
	Exact match “ANABEEB is on a mission to become the best in the industry, together with our highly-dedicated workforce and global partners, we will deliver added value to our customers without…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22	Weston Solutions, INC	Exact match	West Chester, PA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,559 contacts →
	Exact match “Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
23	Partner Engineering & Science, INC	Exact match	Torrance, WA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,481 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
24	PMI	Exact match	Irvine, CA, United StatesHQ recorded Nov 4, 2026	n/a	1,371 contacts →
	Exact match “Training and Development Solutions” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
25	AL Turki Enterprises L.L.C	Exact match	United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,336 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 · 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 contractors”. 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 18,569 oil and gas environmental contractors worldwide

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Oil and gas environmental contractors worldwide at a glance

As of Nov 4, 2026

21.5%Verified-email coverage

24.1Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · Houston

Nov 4, 2026Page data refreshed

Companies by employee count

1-10

8,116

11-50

6,134

51-200

2,639

201-500

866

501-1,000

301

1,001-5,000

269

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 contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas environmental contractors” 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 96,236 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 contractors by location

82 lists · largest first

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

How many oil and gas environmental contractors are there worldwide?

RevenueBase identified 18,569 company matches for oil and gas environmental contractors 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?

Tecnicas Reunidas 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 contractors?

The United States leads with 4,658 companies, followed by Brazil (2,050) and Canada (972). Every oil and gas environmental contractors list by country and city is linked on this page.

Which city has the most oil and gas environmental contractors?

Houston leads with 274 company records, followed by Calgary (205) and Sao Paulo (197).

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 96,236 professional contacts with verified work emails tracked across these 18,569 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.