Company lists · Data refreshed October 2026

Top 25 Downstream refining contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 12,837 companies tracked

RevenueBase identified 12,837 company matches for downstream refining contractors worldwide as of October 2026 and tracks 562,876 professional contacts across them, including 86,203 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for downstream refining 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 refining 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

12,837Companies

562,876Contacts tracked

86,203Verified emails

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The 25 largest downstream refining contractors worldwide

Ranked by team size

Top 25 of 12,837 company matches for downstream refining 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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	Grupo NPE	Exact match	Sao Paulo, BrazilHQ recorded Oct 11, 2026	5,001-10,000	2,548 contacts →
	Exact match “O Grupo NPE é composto por empresas que oferecem soluções integradas para as necessidades da indústria: NPE Service, NPE Industrial, NPE Locação, NPE Facilities, NPE Construções e…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	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
18	Montcalm Montagens Industriais	Exact match	São Paulo, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,354 contacts →
	Exact match “Fundada em 1971, a Montcalm tem como missão, oferecer soluções de engenharia construtiva para implantação, ampliação e manutenção de indústrias de processos, sempre com o…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19	CTCI	Exact match	Taipei City, TaiwanHQ recorded Oct 11, 2026	5,001-10,000	2,161 contacts →
	Exact match “CTCI (TWSE: 9933, TPEx: 5209, TPEx: 6803) is a global engineering, procurement, and construction (EPC) services provider.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	Special Technical Services L.L.C., Oman STS	Exact match	Muscat, OmanHQ recorded Oct 11, 2026	10001+	2,113 contacts →
	Exact match “STS Group, headquartered in The Sultanate of Oman, is a leading multidisciplinary contracting group specializing in Construction, Fabrication and Maintenance services for the…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	ELFE	Exact match	Macaé, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,006 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 · Oct 11, 2026 · View company records in RevenueBase
22	NAES	Exact match	Issaquah, WA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,999 contacts →
	Exact match “NAES is the power generation industry’s largest independent services provider, with more than 40 years of experience managing risk and turning it into profits.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Brown & Root Industrial Services, LLC	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 11, 2026	5,001-10,000	1,969 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 · Oct 11, 2026 · View company records in RevenueBase
24	Rotary Engineering	Exact match	SingaporeHQ recorded Oct 11, 2026	5,001-10,000	1,964 contacts →
	Exact match “Founded 1972 in Singapore, Rotary Engineering is your Strategic Energy Partner providing Integrated Infrastructure Solutions with a sustainability focus.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	Dietsmann	Exact match	Fontvieille, MonacoHQ recorded Oct 11, 2026	5,001-10,000	1,931 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 · 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 refining 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 12,837 downstream refining contractors worldwide

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Downstream refining contractors worldwide at a glance

As of Oct 11, 2026

15.3%Verified-email coverage

43.8Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · Tehran

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

3,346

11-50

4,496

51-200

2,820

201-500

1,109

501-1,000

477

1,001-5,000

430

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 refining contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “downstream refining 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 86,203 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 refining contractors by location

76 lists · largest first

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

How many downstream refining contractors are there worldwide?

RevenueBase identified 12,837 company matches for downstream refining 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?

Petrofac tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most downstream refining contractors?

The United States leads with 1,519 companies, followed by India (895) and Brazil (821). Every downstream refining contractors list by country and city is linked on this page.

Which city has the most downstream refining contractors?

Tehran leads with 285 company records, followed by Houston (214) and Port Harcourt (134).

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 86,203 professional contacts with verified work emails tracked across these 12,837 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.