Company lists · Data refreshed October 2026

Top 25 Refinery upgrade contractors worldwide

Name: Refinery upgrade contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 22, 2026 4,637 companies tracked

RevenueBase identified 4,637 company matches for refinery upgrade contractors worldwide as of October 2026 and tracks 274,204 professional contacts across them, including 36,551 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for refinery upgrade 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 22, 2026. Country and city lists for refinery upgrade 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 22, 2026 How this list was built

4,637Companies

274,204Contacts tracked

36,551Verified emails

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The 25 largest refinery upgrade contractors worldwide

Ranked by team size

Top 25 of 4,637 company matches for refinery upgrade contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 22, 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 Oct 22, 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 22, 2026 · View company records in RevenueBase
2	Samsung E&a	Exact match	Gangdong-gu, South KoreaHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
3	Zachry Group	Exact match	San Antonio, TX, United StatesHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
4	Aesa A-Evangelista SA	Exact match	Canning, IndiaHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
5	ENPPI	Exact match	Nasr City 1, United StatesHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
6	Estrutural	Exact match	Porto Alegre, BrazilHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
7	Qatar Engineering & Construction Company W.L.L	Exact match	Ras Laffan Industrial City (rlic), QatarHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
8	Montcalm Montagens Industriais	Exact match	São Paulo, BrazilHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
9	CTCI	Exact match	Taipei City, TaiwanHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
10	Bilfinger UK	Exact match	Warrington, United KingdomHQ recorded Oct 22, 2026	1,001-5,000	2,157 contacts →
	Exact match “With a strong commitment to sustainability, Bilfinger UK stands out as a premier provider of engineering and maintenance services.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
11	Brown & Root Industrial Services, LLC	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
12	EMC Egyptian Maintenance Company	Exact match	New Cairo, EgyptHQ recorded Oct 22, 2026	5,001-10,000	1,949 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 · Oct 22, 2026 · View company records in RevenueBase
13	Dietsmann	Exact match	Fontvieille, MonacoHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
14	Groupe Ponticelli Frères	Exact match	FranceHQ recorded Oct 22, 2026	5,001-10,000	1,900 contacts →
	Exact match “The Ponticelli Frères Group is one of the main European service suppliers to companies in the energy (oil and gas, nuclear, renewable energy), industrial (chemical, steelworks…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
15	AYTB	Exact match	Jubail Industrial City, Saudi ArabiaHQ recorded Oct 22, 2026	5,001-10,000	1,887 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 · Oct 22, 2026 · View company records in RevenueBase
16	Austin Industrial, INC	Exact match	La Porte, TX, United StatesHQ recorded Oct 22, 2026	1,001-5,000	1,719 contacts →
	Exact match “Austin Industrial delivers premier maintenance, construction, and soft craft services to the nation’s leading producers of oil, gas & chemicals; energy; and manufactured goods.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
17	Robtstone ME LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 22, 2026	1,001-5,000	1,695 contacts →
	Exact match “At Robt.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
18	Audubon Companies	Exact match	Houston, TX, United StatesHQ recorded Oct 22, 2026	1,001-5,000	1,652 contacts →
	Exact match “Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
19	Chiyoda Corporation	Exact match	Yokohama, JapanHQ recorded Oct 22, 2026	5,001-10,000	1,632 contacts →
	Exact match “Since its establishment in 1948, Chiyoda's business field has covered the energy sector such as oil and gas industry including energy conservation, and chemicals, environment…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
20	Arabian Pipeline & Services Co. Ltd. Anabeeb	Exact match	Dammam, Saudi ArabiaHQ recorded Oct 22, 2026	5,001-10,000	1,610 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 · Oct 22, 2026 · View company records in RevenueBase
21	Pt. Jurong Engineering Lestari JEL	Exact match	North Jakarta, IndonesiaHQ recorded Oct 22, 2026	501-1,000	1,542 contacts →
	Exact match “PT Jurong Engineering Lestari (“PTJEL") is a wholly owned subsidiary of the leading engineering and construction company, Jurong Engineering Limited (“JEL”) which is based in…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
22	Dragados Offshore	Exact match	11510 Puerto Real, SpainHQ recorded Oct 22, 2026	1,001-5,000	1,538 contacts →
	Exact match “Founded in 1972, Dragados Offshore S.A.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
23	Galfar Engineering & Contracting Co. W.L.L Emirates	Exact match	Musaffah, United Arab EmiratesHQ recorded Oct 22, 2026	1,001-5,000	1,412 contacts →
	Exact match “Galfar Engineering & Contracting W.L.L Emirates is a multi-discipline Engineering and Construction Company, executing major EPC projects in Oil & Gas and other sectors including…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
24	Petrofac Emirates LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 22, 2026	501-1,000	1,360 contacts →
	Exact match “Petrofac Emirates Formed in 2008, Petrofac Emirates is the first United Arab Emirates (UAE) joint venture company to provide a full range of engineering, design, procurement and…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
25	Arabian Industries	Exact match	Alkhuwair, OmanHQ recorded Oct 22, 2026	10001+	1,330 contacts →
	Exact match “We deliver engineered solutions for the oil, gas and industrialised sectors through our manufacturing, EPC Projects, Maintenance & Turnarounds, Logistics & Rig Moving and Support…” Recorded in the RevenueBase company graph · Oct 22, 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 “refinery upgrade 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 4,637 refinery upgrade contractors worldwide

See the full list, filter by size, metro and specialty, and access 36,551 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Refinery upgrade contractors worldwide at a glance

As of Oct 22, 2026

13.3%Verified-email coverage

59.1Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · Tehran

Oct 22, 2026Page data refreshed

Companies by employee count

1-10

918

11-50

1,529

51-200

1,166

201-500

489

501-1,000

244

1,001-5,000

218

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 refinery upgrade contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “refinery upgrade 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 36,551 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 22, 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.

Refinery upgrade contractors by location

35 lists · largest first

Every Refinery upgrade 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 “refinery upgrade contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many refinery upgrade contractors are there worldwide?

RevenueBase identified 4,637 company matches for refinery upgrade 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?

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

Which country has the most refinery upgrade contractors?

The United States leads with 537 companies, followed by India (337) and Nigeria (256). Every refinery upgrade contractors list by country and city is linked on this page.

Which city has the most refinery upgrade contractors?

Tehran leads with 172 company records, followed by Houston (94) and Port Harcourt (75).

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 36,551 professional contacts with verified work emails tracked across these 4,637 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 22, 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.