Company lists · Data refreshed October 2026

Top 25 Downstream petroleum contractors worldwide

Name: Downstream petroleum contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 10,344 companies tracked

RevenueBase identified 10,344 company matches for downstream petroleum contractors worldwide as of October 2026 and tracks 616,486 professional contacts across them, including 88,615 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for downstream petroleum 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 October 11, 2026. Country and city lists for downstream petroleum 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 Oct 11, 2026 How this list was built

10,344Companies

616,486Contacts tracked

88,615Verified emails

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The 25 largest downstream petroleum contractors worldwide

Ranked by team size

Top 25 of 10,344 company matches for downstream petroleum contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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	Mcdermott International, LTD	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	10001+	21,087 contacts →
	Exact match “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Oct 11, 2026	10001+	16,152 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 · Oct 11, 2026 · View company records in RevenueBase
3	Petrofac	Exact match	London, United KingdomHQ recorded Oct 11, 2026	5,001-10,000	11,863 contacts →
	Exact match “We are a leading international service provider to the energy industry, with a diverse client portfolio including many of the world’s leading energy companies.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4	Tecnicas Reunidas	Exact match	Madrid, SpainHQ recorded Oct 11, 2026	10001+	11,378 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 · Oct 11, 2026 · View company records in RevenueBase
5	Samsung E&a	Exact match	Gangdong-gu, South KoreaHQ recorded Oct 11, 2026	5,001-10,000	7,325 contacts →
	Exact match “SAMSUNG E&A is one of the world’s leading engineering, procurement, construction and project management (EPC & PM) companies.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6	Zachry Group	Exact match	San Antonio, TX, United StatesHQ recorded Oct 11, 2026	10001+	7,053 contacts →
	Exact match “Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Nesma & Partners	Exact match	Khobar, Saudi ArabiaHQ recorded Oct 11, 2026	10001+	5,837 contacts →
	Exact match “Nesma & Partners group is the leading provider of integrated project solutions in the Kingdom of Saudi Arabia.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	Monadelphous	Exact match	Perth, AustraliaHQ recorded Oct 11, 2026	5,001-10,000	5,398 contacts →
	Exact match “Monadelphous is a leading Australian ASX-200 engineering group providing construction, maintenance and industrial services to the resources, energy and infrastructure sectors.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9	Bonatti	Exact match	Parma, United StatesHQ recorded Oct 11, 2026	5,001-10,000	5,233 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 · Oct 11, 2026 · View company records in RevenueBase
10	Aesa A-Evangelista SA	Exact match	Canning, IndiaHQ recorded Oct 11, 2026	5,001-10,000	5,219 contacts →
	Exact match “Since 1948 we specialize in projects for the energy industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11	Imperial OIL	Exact match	Calgary, AB, CanadaHQ recorded Oct 11, 2026	5,001-10,000	4,275 contacts →
	Exact match “After more than a century, Imperial continues to be an industry leader in applying technology and innovation to responsibly develop Canada’s energy resources.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	Bilfinger	Exact match	Mannheim, GermanyHQ recorded Oct 11, 2026	10001+	4,268 contacts →
	Exact match “Bilfinger is an international industrial services provider with a vision to be the No.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	CBSI	Exact match	Volta Redonda, BrazilHQ recorded Oct 11, 2026	10001+	3,994 contacts →
	Exact match “Somos a CBSI!” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14	UTC Engenharia	Exact match	São Paulo, BrazilHQ recorded Oct 11, 2026	10001+	3,755 contacts →
	Exact match “The Company operates in sundry markets, taking the lead in such sectors as oil & gas production and processing, petrochemicals, power generation, steel production, paper & pulp…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	S&b	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	3,615 contacts →
	Exact match “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Team, INC	Exact match	Sugar Land, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	3,530 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Oct 11, 2026	10001+	3,504 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 · Oct 11, 2026 · View company records in RevenueBase
18	ENPPI	Exact match	Nasr City 1, United StatesHQ recorded Oct 11, 2026	1,001-5,000	3,451 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 · Oct 11, 2026 · View company records in RevenueBase
19	Altrad	Exact match	Montpellier, FranceHQ recorded Oct 11, 2026	10001+	3,345 contacts →
	Exact match “ALTRAD AT A GLANCE Altrad is a world leader in the provision of industrial services, generating high-added value solutions principally for the Energy, Power Generation, Oil & Gas…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	Priner	Exact match	Rio De Janeiro, BrazilHQ recorded Oct 11, 2026	5,001-10,000	3,003 contacts →
	Exact match “Há mais de 40 anos, a Priner se destaca no setor de engenharia industrial e infraestrutura, oferecendo soluções com excelência técnica, seguras e eficientes.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Expertise	Exact match	Al Jubail, Saudi ArabiaHQ recorded Oct 11, 2026	10001+	2,939 contacts →
	Exact match “Established in 2008 and headquartered in Al Jubail with operational offices across the kingdom, Expertise Company Ltd.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Performance Contractors	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,920 contacts →
	Exact match “We began as a merit shop general industrial contractor back in 1979.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Estrutural	Exact match	Porto Alegre, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,795 contacts →
	Exact match “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	Brand Energy & Infrastructure Services	Exact match	United KingdomHQ recorded Oct 11, 2026	10001+	2,739 contacts →
	Exact match “Brand Energy & Infrastructure Services supports customers’ maintenance, turnaround and refurbishment needs as well as new construction, capital-driven upgrades and expansion…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	Qatar Engineering & Construction Company W.L.L	Exact match	Ras Laffan Industrial City (rlic), QatarHQ recorded Oct 11, 2026	5,001-10,000	2,397 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 · Oct 11, 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 “downstream petroleum 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 10,344 downstream petroleum contractors worldwide

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Downstream petroleum contractors worldwide at a glance

As of Oct 11, 2026

14.4%Verified-email coverage

59.6Average contacts per company

11-50Median size (employees)

3.0%Largest-city concentration · Tehran

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

2,196

11-50

3,535

51-200

2,460

201-500

1,027

501-1,000

485

1,001-5,000

455

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 downstream petroleum contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “downstream petroleum 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 88,615 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 October 11, 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.

Downstream petroleum contractors by location

62 lists · largest first

Every Downstream petroleum 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 “downstream petroleum contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many downstream petroleum contractors are there worldwide?

RevenueBase identified 10,344 company matches for downstream petroleum contractors worldwide as of October 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?

Mcdermott International, LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most downstream petroleum contractors?

The United States leads with 1,194 companies, followed by India (693) and Nigeria (500). Every downstream petroleum contractors list by country and city is linked on this page.

Which city has the most downstream petroleum contractors?

Tehran leads with 311 company records, followed by Houston (165) and Abu Dhabi (139).

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 88,615 professional contacts with verified work emails tracked across these 10,344 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 October 11, 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.