Company lists · Data refreshed November 2026

Top 24 Refinery engineers based in the United States

RevenueBase identified 1,477 company matches for refinery engineers associated with the United States as of November 2026 and tracks 100,462 professional contacts across them, including 26,703 with verified work emails. Houston is the largest hub.

This list covers company matches for refinery engineers associated with the United States, 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 6, 2026.

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 6, 2026 How this list was built
1,477Companies
100,462Contacts tracked
26,703Verified emails
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The 24 largest refinery engineers based in the United States

Ranked by team size
Top 24 of 1,477 company matches for refinery engineers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202610001+21,606 contacts →

Exact match

“McDermott is a premier provider of engineering and construction solutions to the energy industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchHouston, TX, United StatesHQ recorded Nov 6, 20261,001-5,0004,413 contacts →

Exact match

“CITGO Petroleum Corporation is a recognized leader in the refining industry and operates under the well-known CITGO brand.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchHouston, LA, United StatesHQ recorded Nov 6, 20265,001-10,0003,819 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchWichita, MN, United StatesHQ recorded Nov 6, 20261,001-5,0003,001 contacts →

Exact match

“Flint Hills Resources is a leading refining company with operations primarily in the Midwest and Texas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchDallas, TX, United StatesHQ recorded Nov 6, 20265,001-10,0002,415 contacts →

Exact match

“Headquartered in Dallas, Texas, HF Sinclair Corporation is an independent, diversified energy company committed to safely producing products that power the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchHouston, LA, United StatesHQ recorded Nov 6, 20261,001-5,0001,699 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 · Nov 6, 2026 · View company records in RevenueBase
7Exact matchBrentwood, TN, United StatesHQ recorded Nov 6, 20261,001-5,0001,361 contacts →

Exact match

“Delek US is a diversified downstream energy company with assets in petroleum refining, asphalt, renewable fuels, and logistics.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Nov 6, 2026201-5001,223 contacts →

Exact match

“Who We Are Englobal Founded in 1985, ENGlobal (NASDAQ: ENG) is a specialty engineering services firm that focuses on automation solutions and select EPCM projects for the energy…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Nov 6, 20261,001-5,0001,165 contacts →

Exact match

“At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchTulsa, OK, United StatesHQ recorded Nov 6, 20261,001-5,000946 contacts →

Exact match

“Since 1979, Zeeco is the trusted worldwide source for the design and manufacturing of combustion and environmental solutions for the refining, petrochemical, production, power and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchMetairie, LA, United StatesHQ recorded Nov 6, 2026501-1,000750 contacts →

Exact match

“EDG Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Nov 6, 2026501-1,000559 contacts →

Exact match

“Ingenero's goal is to be the best process engineering firm by delivering the highest quality service and software solutions at the lowest cost.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchIrvine, CA, United StatesHQ recorded Nov 6, 20261,001-5,000547 contacts →

Exact match

“ARB Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLiberty Corner, NJ, United StatesHQ recorded Nov 6, 2026501-1,000542 contacts →

Exact match

“Becht partners with industrial operators across the energy and process sectors to solve complex challenges that impact safety, reliability, and profitability.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLa Porte, TX, United StatesHQ recorded Nov 6, 20261,001-5,000533 contacts →

Exact match

“When we formed Contech in 1980, our goal was to create a specialized engineering and construction company to provide a full range of system independent services for process…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchTulsa, LA, United StatesHQ recorded Nov 6, 20261,001-5,000522 contacts →

Exact match

“Matrix Service is a subsidiary of Matrix Service Company (NASDAQ: MTRX).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBeaumont, TX, United StatesHQ recorded Nov 6, 20261,001-5,000520 contacts →

Exact match

“RICHARD is a full-service engineering, procurement and construction firm in the petrochemical and refining industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBaytown, TX, United StatesHQ recorded Nov 6, 20261,001-5,000502 contacts →

Exact match

“Turn2 Specialty Companies is the premier provider of specialty turnaround services in the refining, petrochemical, and power industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Nov 6, 20261,001-5,000454 contacts →

Exact match

“Ketjen is a provider of advanced catalyst solutions to leading producers in the petrochemical and refining industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBellingham, CA, United StatesHQ recorded Nov 6, 2026201-500454 contacts →

Exact match

“Founded in 1971, Anvil Corporation is a 100% employee-owned engineering firm providing multi-discipline engineering, design, project management, procurement, and construction…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLa Porte, TX, United StatesHQ recorded Nov 6, 20265,001-10,000447 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSulphur, LA, United StatesHQ recorded Nov 6, 2026501-1,000424 contacts →

Exact match

“ReCon was established in 1995 and has matured as a high quality and competitive engineering consulting firm providing engineering design and project management services to the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLong Beach, TX, United StatesHQ recorded Nov 6, 2026201-500400 contacts →

Exact match

“Mangan Inc, an Automation & Engineering Firm, provides the highest quality services for the Refining, Gas & Oil, Pipeline, Renewable, Chemical, and Biopharm Industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSand Springs, OK, United StatesHQ recorded Nov 6, 2026201-500372 contacts →

Exact match

“Since 1972, CUST-O-FAB has maintained a reputation of consistently providing quality ASME Code fabricated equipment and on-site services for the refining, petrochemical, syngas…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 24 of 1,477 refinery engineers based in the United States

See the full list, filter by size, metro and specialty, and access 26,703 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Refinery engineers based in the United States at a glance

As of Nov 6, 2026
26.6%Verified-email coverage
68.0Average contacts per company
11-50Median size (employees)
16.6%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
550
11-50
507
51-200
270
201-500
82
501-1,000
29
1,001-5,000
30
5,001-10,000
4
10001+
4

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,477 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “refinery engineers” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 26,703 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 6, 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.

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 engineers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many refinery engineers are there based in the United States?

RevenueBase identified 1,477 company matches for refinery engineers associated with the United States 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?

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

Which city has the most refinery engineers?

Houston leads with 245 company records, followed by Tulsa (36) and Denver (22).

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 26,703 professional contacts with verified work emails tracked across these 1,477 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 6, 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.