Company lists · Data refreshed October 2026

Top 25 Downstream refining contractors based in the United States

RevenueBase identified 1,519 company matches for downstream refining contractors associated with the United States as of October 2026 and tracks 97,909 professional contacts across them, including 25,921 with verified work emails. Houston is the largest hub.

This list covers company matches for downstream refining contractors 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 October 11, 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 Oct 11, 2026 How this list was built
1,519Companies
97,909Contacts tracked
25,921Verified emails
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The 25 largest downstream refining contractors based in the United States

Ranked by team size
Top 25 of 1,519 company matches for downstream refining contractors based in the United States, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Antonio, TX, United StatesHQ recorded Oct 11, 202610001+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
2Exact matchHouston, TX, United StatesHQ recorded Oct 11, 20265,001-10,0003,615 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
3Exact matchBaton Rouge, LA, United StatesHQ recorded Oct 11, 20261,001-5,0002,920 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
4Exact matchIssaquah, WA, United StatesHQ recorded Oct 11, 20261,001-5,0001,999 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
5Exact matchBaton Rouge, LA, United StatesHQ recorded Oct 11, 20265,001-10,0001,969 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
6Exact matchMobile, AL, United StatesHQ recorded Oct 11, 20261,001-5,0001,881 contacts →

Exact match

“Hargrove is a full-service engineering, procurement, and construction management firm delivering multi-discipline engineering, project delivery, controls & automation, and…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7Exact matchPhiladelphia, MS, United StatesHQ recorded Oct 11, 20265,001-10,0001,831 contacts →

Exact match

“Yates Construction is part of The Yates Companies, Inc.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8Exact matchLa Porte, TX, United StatesHQ recorded Oct 11, 20261,001-5,0001,719 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 11, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Oct 11, 20261,001-5,0001,652 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 11, 2026 · View company records in RevenueBase
10Exact matchSouthfield, MI, United StatesHQ recorded Oct 11, 20261,001-5,0001,499 contacts →

Exact match

“Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11Exact matchThe Woodlands, TX, United StatesHQ recorded Oct 11, 202610001+1,416 contacts →

Exact match

“As a leading construction and maintenance provider, Bilfinger aims to enhance the efficiency of assets and lower operational costs.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12Exact matchDeer Park, TX, United StatesHQ recorded Oct 11, 2026501-1,0001,360 contacts →

Exact match

“Universal Plant Services (UPS) is the industry's foremost specialists in rotating and reciprocating equipment services.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13Exact matchBrentwood, TN, United StatesHQ recorded Oct 11, 20261,001-5,0001,312 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 · Oct 11, 2026 · View company records in RevenueBase
14Exact matchSpring, TX, United StatesHQ recorded Oct 11, 20261,001-5,0001,212 contacts →

Exact match

“Strike safely and reliably delivers the specialized asset maintenance, construction, and contracting services that are business-critical to the energy, chemical, manufacturing…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026201-5001,203 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 · Oct 11, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Oct 11, 20261,001-5,0001,171 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 · Oct 11, 2026 · View company records in RevenueBase
17Exact matchBaton Rouge, LA, United StatesHQ recorded Oct 11, 20261,001-5,0001,036 contacts →

Exact match

“EXCEL is a leading provider of industrial construction services, including maintenance, turnarounds, fabrication, and disaster recovery.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18Exact matchLa Porte, TX, United StatesHQ recorded Oct 11, 20261,001-5,000911 contacts →

Exact match

“Starcon is a national, full-service contractor offering comprehensive industrial and mechanical services in the oil & gas/refining, chemical/petrochemical, natural gas processing…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19Exact matchBaton Rouge, LA, United StatesHQ recorded Oct 11, 20261,001-5,000898 contacts →

Exact match

“Repcon has earned a reputation for leading the industry in turnarounds, specialty welding, construction, pipe fabrication, and maintenance.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20Exact matchTulsa, OK, United StatesHQ recorded Oct 11, 20261,001-5,000809 contacts →

Exact match

“Matrix Service Company (Nasdaq: MTRX) is a leading specialty engineering and construction company whose commitment to safety, quality, and integrity has earned its subsidiaries a…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21Exact matchMetairie, LA, United StatesHQ recorded Oct 11, 2026501-1,000736 contacts →

Exact match

“EDG Inc.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22Exact matchKaty, TX, United StatesHQ recorded Oct 11, 20261,001-5,000734 contacts →

Exact match

“Vepica is a multinational engineering company with more than 53 years experience in the energy, industrial, infrastructure and petrochemical sectors.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23Exact matchWestminster, CO, United StatesHQ recorded Oct 11, 20261,001-5,000730 contacts →

Exact match

“Loenbro is a trusted, long-term construction lifecycle partner to thousands of customers across the U.S.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Oct 11, 20261,001-5,000725 contacts →

Exact match

“WYATT is recognized for executing complex maintenance, outage, turnaround, and capital construction projects across the Oil, Gas & Chemical, and Power markets.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202610001+724 contacts →

Exact match

“Primoris is a specialty energy infrastructure contractor serving the oil and gas and power industries with offerings that primarily include construction, maintenance and…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

Showing 25 of 1,519 downstream refining contractors based in the United States

See the full list, filter by size, metro and specialty, and access 25,921 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Downstream refining contractors based in the United States at a glance

As of Oct 11, 2026
26.5%Verified-email coverage
64.5Average contacts per company
11-50Median size (employees)
14.1%Largest-city concentration · Houston
Oct 11, 2026Page data refreshed

Companies by employee count

1-10
348
11-50
489
51-200
399
201-500
144
501-1,000
57
1,001-5,000
66
5,001-10,000
11
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 1,519 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 “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. 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 25,921 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.

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 based in the United States?

RevenueBase identified 1,519 company matches for downstream refining contractors associated with the United States 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?

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

Which city has the most downstream refining contractors?

Houston leads with 214 company records, followed by Tulsa (30) and Midland (23).

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 25,921 professional contacts with verified work emails tracked across these 1,519 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.

Ready to reach these companies? Verified emails and direct dials for all 1,519 downstream refining contractors based in the United States. Start with a free account, no credit card.

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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.