Company lists · Data refreshed September 2026

Top 25 Refinery engineering firms based in Tulsa, United States

Name: Refinery engineering firms based in Tulsa, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 31 companies tracked

RevenueBase identified 31 company matches for refinery engineering firms associated with Tulsa, United States as of September 2026 and tracks 1,264 professional contacts across them, including 488 with verified work emails. Across the United States, Houston is the largest hub for this category (338 companies); Tulsa has 31.

This list covers company matches for refinery engineering firms associated with Tulsa, 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 September 17, 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 Sep 17, 2026 How this list was built

31Companies

1,264Contacts tracked

488Verified emails

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The 25 largest refinery engineering firms based in Tulsa, United States

Ranked by team size

Top 25 of 31 company matches for refinery engineering firms based in Tulsa, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	Matrix Service	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1,001-5,000	492 contacts →
	Exact match “Matrix Service is a subsidiary of Matrix Service Company (NASDAQ: MTRX).” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Matrix PDM Engineering	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	201-500	165 contacts →
	Exact match “Matrix PDM Engineering, a subsidiary of Matrix Service Company (Nasdaq: MTRX) provides multi-disciplinary engineering, procurement and construction management services to the…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Select Engineering INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	51-200	95 contacts →
	Exact match “Select Engineering, Inc, is a privately-held company with offices in Tulsa,OK and Houston,TX.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	MPW Engineering, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	51-200	86 contacts →
	Exact match “We at MPW Engineering have used our full depth of multi-disciplinary expertise to create solutions for clients, big and small, across the United States.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Construction & Turnaround Services	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	201-500	57 contacts →
	Exact match “Construction & Turnaround Services combines the best in field construction and fabrication to respond to your most demanding projects.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Esdc INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	56 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	ALL Consulting	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	38 contacts →
	Exact match “ALL CONSULTING - Where employees put Family First in everything we do – at home, at work, and for our clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	BIG ELK Energy Systems, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	51-200	33 contacts →
	Exact match “Big Elk Energy Systems LLC was founded to bring the best possible talent and service to the energy industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	QPS Flint, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	29 contacts →
	Exact match “QPS Flint Construction (Flint) takes pride in a successful history constructing oil facilities, gas facilities and civil construction projects since 1957.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	XRG Technologies, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	27 contacts →
	Exact match “XRG Technologies is an engineering and procurement company specializing in fired equipment for the refining, petrochemical and power markets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Tulsa Heaters INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	23 contacts →
	Exact match “Tulsa Heaters, Inc.(THI) is a private Engineering firm located in Tulsa, OK, celebrating 35 years of service to the global oil & gas industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Purpose Engineering, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	22 contacts →
	Exact match “Purpose Engineering is a multi-disciplinary engineering services firm focused on industrial facilities.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Mohawk Field Services INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	16 contacts →
	Exact match “Mohawk Field Services, Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Scfm Compression Systems	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	15 contacts →
	Exact match “Doing Gas compression right - the first time, every time" We are engaged in helping our clients improve all aspects of gas compression, one site at a time.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	C5 Process Group, INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1-10	10 contacts →
	Exact match “C5 Process Group Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Resolute Engineering, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “Resolute Engineering provides a full complement of services across the energy industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Insulation Specialists Of Tulsa INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1-10	9 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	LEE And Browne Consulting Engineers, INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	5 contacts →
	Exact match “Lee and Browne Consulting Engineers, Inc is a company based out of 1207 S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Anderson OIL & GAS Consultants, INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1-10	5 contacts →
	Exact match “Anderson Oil & Gas Consultants, Inc.(AOGC) is a licensed engineering firm serving small to midsize operators, mineral companies, law firms, financial institutions, and individual…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Reynolds-French & Company	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	4 contacts →
	Exact match “Reynolds-French has been providing service to the pipeline, gas processing, refining and chemical industries for over 75 years.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	R & R Engineering Co. INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	3 contacts →
	Exact match “Since 1968, R&R has served the air cooled heat exchanger needs of Chemical, Petrochemical, and Natural Gas Transmission Industries.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Graceson Engineering	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “We are primarily focused on upstream and midstream energy assets, but we have experience in numerous other fields.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Innovative Production	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1-10	2 contacts →
	Exact match “Innovative Production is dedicated to servicing the upstream oil and gas industry through our vast network of engineering, supply chain and manufacturing.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Geo. D. Daly, Jr. And Associates, INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	1-10	2 contacts →
	Exact match “Geo.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Compression Dynamics Consulting, LLC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match “Compression Dynamics Consulting, LLC is an engineering consulting firm specializing in the oil and natural gas industry.” Recorded in the RevenueBase company graph · Sep 17, 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 engineering firms”. 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 31 refinery engineering firms based in Tulsa, United States

See the full list, filter by size, metro and specialty, and access 488 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Refinery engineering firms based in Tulsa, United States at a glance

As of Sep 17, 2026

38.6%Verified-email coverage

40.8Average contacts per company

11-50Median size (employees)

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Tulsa, so it is reported there. Company counts and contact totals on this page are exact for Tulsa, over 31 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 Tulsa, United States whose business descriptions match “refinery engineering firms” 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 488 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 September 17, 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 engineering firms by metro in the United States

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

How many refinery engineering firms are there based in Tulsa, United States?

RevenueBase identified 31 company matches for refinery engineering firms associated with Tulsa, United States as of September 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?

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

Which city in the United States has the most refinery engineering firms?

Houston leads the United States with 338 company records, followed by New York (40) and Austin (36). Tulsa has 31.

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 488 professional contacts with verified work emails tracked across these 31 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 September 17, 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.