Company lists · Data refreshed September 2026
Top 25 Petroleum refinery engineers worldwide
RevenueBase identified 223 petroleum refinery engineers worldwide as of September 2026 and tracks 24,370 professional contacts across them, including 3,914 with verified work emails. The United States is the largest market and Tehran the largest hub.
This list covers petroleum refinery engineers worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for petroleum refinery engineers follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest petroleum refinery engineers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,005 contacts → | ||||
Indirect evidence “Rabigh Refining & Petrochemical Co- Petro Rabigh - was founded as a joint venture between Saudi Aramco and Sumitomo Chemical in 2005.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,396 contacts → | ||||
Indirect evidence “Pengerang Refining Company Sdn Bhd and Pengerang Petrochemical Sdn Bhd (collectively known as PRefChem) are two joint ventures formed from the strategic alliance of two of the…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,270 contacts → | ||||
Strong evidence “Attock Refinery Limited (ARL) is the pioneer and pacesetter in Pakistan’s petroleum refining sector.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,194 contacts → | ||||
Partial evidence “Chennai Petroleum Corporation Limited (CPCL) is a subsidiary of IOCL with world class refining technologies and a dominant presence in South India.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 997 contacts → | ||||
Partial evidence “OQ8, a joint venture between Oman’s OQ Group and Kuwait’s Kuwait Petroleum International (KPI), represents a transformative force in the GCC’s oil refining sector.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 944 contacts → | ||||
Indirect evidence “SAPREF is a joint venture between Shell SA Refining and BP Southern Africa.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 790 contacts → | ||||
Indirect evidence “GS 78 5.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 543 contacts → | ||||
Partial evidence “Pakistan Refinery Limited was incorporated in Pakistan as a public limited company in May 1960 and is quoted on the Karachi and Lahore Stock Exchanges.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 469 contacts → | ||||
Indirect evidence “ISAB's refining, gasification and electricity cogeneration plants, included in the petrochemical of Priolo Gargallo (located in Sicily, between Catania and Syracuse), represent…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 466 contacts → | ||||
Indirect evidence “Located at Grangemouth, some 40km west of Edinburgh, one of INEOS’ largest manufacturing sites directly employs c1500 highly skilled people.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 452 contacts → | ||||
Strong evidence “Jordan Petroleum Refinery Company Ltd (JPRC) A crude oil refinery founded in 1956, started production in 1961.the Refinery site is located in the city of Zarqa around 35 km east…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 419 contacts → | ||||
Partial evidence “As part of the Quanta Services Family of Companies (NYSE: PWR)- Stronghold provides the safest, leanest, most efficient, quality solutions for the refinery, petrochemical and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 415 contacts → | ||||
Partial evidence “Performing the activity of crude oil refining and high-quality petroleum products processing, for domestic and international markets.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 359 contacts → | ||||
Indirect evidence “Rafineria Gdańska Sp.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 352 contacts → | ||||
Partial evidence “Fuel Your Career at the Co-op Refinery Complex.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 346 contacts → | ||||
Indirect evidence “Nous sommes un acteur majeur de l'énergie implanté sur le plus gros site pétrochimique et raffinage du sud de la France, au bord de la méditerranée.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 317 contacts → | ||||
Indirect evidence “Hengyuan Refining Company Berhad (HRC), formerly known as Shell Refining Company (Federation of Malaya) Berhad (SRC), was incorporated in Malaysia on 19 September 1960.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 303 contacts → | ||||
Indirect evidence “Aftab Oil Refining (Previously named as MTA Holding) was founded on December 29, 2007.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 275 contacts → | ||||
Partial evidence “Star Petroleum Refining Public Company Limited (“SPRC”) is one of the leading producers of petroleum products in Thailand and offers customers a reliable source of high quality…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 249 contacts → | ||||
Partial evidence “Amreya Petroleum Refining Company (A.P.R.C) is one of the large complexes petroleum in the oil sector and have assumed the company at the forefront of the field of refining and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 233 contacts → | ||||
Partial evidence “Chemical Engineering Partners (CEP) is a world leader in used oil re-refining designs and process technology.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 223 contacts → | ||||
Indirect evidence “American Refining Group Inc.’s unique facility is situated on approximately 131 acres in Bradford, Pennsylvania, the heart of McKean County and the birthplace of the U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 201 contacts → | ||||
Indirect evidence “Kangan Petro Refining Co.(KPRC) has been established in 2014 as a owner of C2 Recovery and Fractionation Plant of South Pars Phase 12.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 174 contacts → | ||||
Indirect evidence “Azzawiya is a bpd” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 168 contacts → | ||||
Partial evidence “St1's refinery in Gothenburg is widely recognized as one of the world's most efficient.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: petroleum refinery engineers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names petroleum refinery engineers.
- Partial evidence
- Its own public description names part of petroleum refinery engineers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name petroleum refinery engineers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 223 petroleum refinery engineers worldwide
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Petroleum refinery engineers worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among petroleum refinery engineers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for petroleum refinery engineers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “petroleum refinery engineers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names petroleum refinery engineers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among petroleum refinery engineers, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 3,914 across the full list. 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 September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Petroleum refinery engineers by location
1 lists · largest firstEvery Petroleum refinery engineers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names petroleum refinery engineers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many petroleum refinery engineers are there worldwide?
RevenueBase identified 223 petroleum refinery engineers worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Petro Rabigh, headquartered in Makkah, tops this list with the largest team on record.
Which country has the most petroleum refinery engineers?
The United States leads with 31 companies. Every petroleum refinery engineers list by country and city is linked on this page.
Which city has the most petroleum refinery engineers?
Tehran leads with 13 headquartered companies, followed by Houston (6) and Chennai (4).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,914 verified decision-maker contacts tracked across these 223 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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 Smart Search, 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.