Company lists · Data refreshed October 2026

Top 25 Downstream engineering companies based in Houston, United States

RevenueBase identified 174 company matches for downstream engineering companies associated with Houston, United States as of October 2026 and tracks 9,666 professional contacts across them, including 2,308 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers company matches for downstream engineering companies associated with Houston, 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
174Companies
9,666Contacts tracked
2,308Verified emails
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The 25 largest downstream engineering companies based in Houston, United States

Ranked by team size
Top 25 of 174 company matches for downstream engineering companies based in Houston, 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 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
2Exact 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
3Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026501-1,000551 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 · Oct 11, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026201-500315 contacts →

Exact match

“Kestrel provides engineering, project and construction management and inspection services to the oil and gas industries.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026201-500307 contacts →

Exact match

“We are A-Team of engineers specializing in the energy industry.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-200260 contacts →

Exact match

“CTS - Complete Technical Services, Inc.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026201-500139 contacts →

Exact match

“We, Pyramid E&C provide Modular, Digital and Sustainable Hydrocarbon processing solutions from last 25 years and have executed more than 700 projects worldwide.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-200136 contacts →

Exact match

“PERC Engineering is a full-service engineering & project management firm in the oil & gas energy sector.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026501-1,000136 contacts →

Exact match

“Holloman Corporation is an Engineering, Procurement, and Construction company with capabilities to design, build, and service energy-related projects on a global level.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20079 contacts →

Exact match

“Strategy Engineering is a privately-owned technical services company located within the Energy Corridor in Houston, TX.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20071 contacts →

Exact match

“F&C Engineers provides full services from concept to start up for the oil and gas upstream, midstream, and turbomachinery industries.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20065 contacts →

Exact match

“Since 1993, Pinnacle has remained focused on providing practical and complete engineering services to the offshore oil and gas industry.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20057 contacts →

Exact match

“Bold brings a unique blend of products, services, and technology to our customers by leveraging our extensive experience in the oil and gas industry.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20057 contacts →

Exact match

“For over 60 years, KF Valves and its market leading brands have been delivering customer-focused, product and service solutions for the world's most demanding energy applications…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20055 contacts →

Exact match

“BD Energy Systems LLC located in Houston, TX, USA is a world leading engineering company operating in the Petrochemical, Fertilizer, Refining, and Gas Processing industry…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20053 contacts →

Exact match

“Toadfly Technologies is an innovative industrial software organization that brings solutions to your exact needs.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202611-5045 contacts →

Exact match

“Who We Are TKE was founded in Houston, Texas in 1992 by Terry Eleiott, PE and his wife Kathy Eleiott.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20040 contacts →

Exact match

“OFD is a full-service engineering contractor committed to helping our client’s complete successful offshore and onshore oil and gas projects covering both upstream, midstream and…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202611-5031 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202611-5030 contacts →

Exact match

“Midstream & Terminal Services (MTS) is a privately-owned registered architectural and engineering company that serves a diverse set of industries.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20027 contacts →

Exact match

“PTS is a technical services company who specializes in providing training, precommissioning, commissioning, startup and operations of new, and existing process facilities.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Oct 11, 2026201-50026 contacts →

Exact match

“BGS Energy Services offers a wide range of onshore and offshore services for our Customers in the Oil and Gas industry maximizing the value of the reservoir throughout various…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202611-5023 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202651-20022 contacts →

Exact match

“JTAM Engineering LLC (JTAM) serves the Midstream Energy Industry providing project management, multi-discipline engineering and design, quality assurance, and procurement support…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Oct 11, 202611-5020 contacts →

Exact match

“Ascent Engineering, Inc.”

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

Showing 25 of 174 downstream engineering companies based in Houston, United States

See the full list, filter by size, metro and specialty, and access 2,308 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Downstream engineering companies based in Houston, United States at a glance

As of Oct 11, 2026
23.9%Verified-email coverage
55.6Average contacts per company
11-50Median size (employees)
Oct 11, 2026Page data refreshed

Companies by employee count

1-10
59
11-50
61
51-200
34
201-500
7
501-1,000
6
1,001-5,000
5
5,001-10,000
1
10001+
1

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 174 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 Houston, United States whose business descriptions match “downstream engineering companies” 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 2,308 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 engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many downstream engineering companies are there based in Houston, United States?

RevenueBase identified 174 company matches for downstream engineering companies associated with Houston, 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?

Audubon Companies 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 downstream engineering companies?

Houston leads the United States with 174 company records, followed by Katy (18) and Tulsa (15).

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 2,308 professional contacts with verified work emails tracked across these 174 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.

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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.