Company lists · Data refreshed September 2026

Top 25 Engineering outsourcing firms based in Houston, United States

Name: Engineering outsourcing firms based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 123 companies tracked

RevenueBase identified 123 engineering outsourcing firms headquartered in Houston, United States as of September 2026 and tracks 1,458 professional contacts across them, including 445 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers engineering outsourcing firms headquartered in Houston, United States, 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 28, 2026.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

123Companies

1,458Contacts tracked

445Verified emails

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The 25 largest engineering outsourcing firms based in Houston, United States

Ranked by team size

Top 25 of 123 engineering outsourcing firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to engineering outsourcing firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Zentech Incorporated	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	181 contacts →
	Partial evidence “Zentech, Inc, an engineering consulting and software development company, headquartered in Houston, TX, is comprised of experienced professionals specializing in providing…” Source: RevenueBase Database · checked Sep 28, 2026
2	Perc Engineering	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	124 contacts →
	Partial evidence “PERC Engineering is a full-service engineering & project management firm in the oil & gas energy sector.” Source: RevenueBase Database · checked Sep 28, 2026
3	S&b Infrastructure, LTD	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	97 contacts →
	Partial evidence “S&B Infrastructure, Ltd.(S & BI) has been in existence since 1994 as part of S&B Holdings, Ltd,(one of the largest privately-owned engineering firms in the State of Texas).” Source: RevenueBase Database · checked Sep 28, 2026
4	Novetus	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	83 contacts →
	Partial evidence “Novetus is an engineering company that focuses on Capital Project Engineering, Project Controls, Asset Integrity, Safety & Risk Management, and Process Safety Management…” Source: RevenueBase Database · checked Sep 28, 2026
5	Pinnacle Engineering	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	62 contacts →
	Partial evidence “Since 1993, Pinnacle has remained focused on providing practical and complete engineering services to the offshore oil and gas industry.” Source: RevenueBase Database · checked Sep 28, 2026
6	Decon LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	55 contacts →
	Partial evidence “MBE \| SBE \| DBE \| HUB \| HHF, TBPE Firm No 16156 DECON LLC,founded by Fulvio Jaramillo, a consulting engineering firm committed to technical excellence, DECON’s services help…” Source: RevenueBase Database · checked Sep 28, 2026
7	Blackline Engineering, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	46 contacts →
	Partial evidence “Blackline Engineering, LLC is a Houston based engineering consulting firm that offers innovative design and project management services that are tailored for each client.” Source: RevenueBase Database · checked Sep 28, 2026
8	RPT Alliance LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	43 contacts →
	Indirect evidence “As of December 8, 2025, RTP Alliance has been acquired by by Bowman.” Source: RevenueBase Database · checked Sep 28, 2026
9	Interfield Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	40 contacts →
	Partial evidence “Interfield is a leading engineering company specializing in engineering services.” Source: RevenueBase Database · checked Sep 28, 2026
10	Priserve Consulting INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “PriServe Group company engaged in Technology and Engineering Services” Source: RevenueBase Database · checked Sep 28, 2026
11	Ascent Engineering INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “Ascent Engineering, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
12	N&a Engineering Solutions, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	19 contacts →
	Partial evidence “N&A USA Engineering Solutions, Inc was founded in 2015 and is a specialized in multidisciplinary engineering & project management for medium & large-sized projects, working across…” Source: RevenueBase Database · checked Sep 28, 2026
13	SSP Engineering And Consulting	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “SSP Engineering & Consulting is a consulting firm based in the Houston Metropolitan area.” Source: RevenueBase Database · checked Sep 28, 2026
14	PX Americas	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Strategically located in Houston and Calgary to reach our clients and ensure we have resource capability across North America while leveraging our global engineering community to…” Source: RevenueBase Database · checked Sep 28, 2026
15	Trylene, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “Trylene is your ISO 9001 and ITAR certified ON-SHORE electronic manufacturing and assembly partner.” Source: RevenueBase Database · checked Sep 28, 2026
16	Flesch Engineering, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
17	Kswc King Southwest & Consulting Of Cypress	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “KSWC provides a unique blend of precision machining and engineering capabilities to serve prototyping and/or production needs.” Source: RevenueBase Database · checked Sep 28, 2026
18	Aitken Manufacturing	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	10 contacts →
	Indirect evidence “For over 80 years Aitken has partnered with clients to engineer and manufacture equipment solutions for their critical projects.” Source: RevenueBase Database · checked Sep 28, 2026
19	I-Solids	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Knight Engineering Solutions LLC dba i-SOLIDS is a specialized team of engineers, designers, and programmers who provide technical consulting and turnkey prototyping solutions: •…” Source: RevenueBase Database · checked Sep 28, 2026
20	Dawson VAN Orden DVO	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	7 contacts →
	Partial evidence “Dawson Van Orden is a rapidly growing, family-owned, Civil, Structural, MEP and Technology Consulting Engineering firm.” Source: RevenueBase Database · checked Sep 28, 2026
21	Liberty Tech	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Liberty Tech is a Houston-based product design and engineering as a service company focused on integrated hardware and software product development.” Source: RevenueBase Database · checked Sep 28, 2026
22	Shrader Consultants	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Shrader Consultants is a Houston-based consulting firm specializing in electrical, automation and communications systems design for critical infrastructure projects such as…” Source: RevenueBase Database · checked Sep 28, 2026
23	Iot-Mation INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “We are a group of Electrical Engineers and Subject Matter Experts focusing on electrical engineering, instrumentation & automation engineering, Supervisory Control and Data…” Source: RevenueBase Database · checked Sep 28, 2026
24	Technical Design Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “Technical Design Solutions is built on a foundation of experience, performance, and integrity.” Source: RevenueBase Database · checked Sep 28, 2026
25	Admiralty, Marine & Structural Engineering, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026

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: engineering outsourcing firms. 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 engineering outsourcing firms.
Partial evidence: Its own public description names part of engineering outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering outsourcing firms. 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 123 engineering outsourcing firms based in Houston, United States

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Engineering outsourcing firms based in Houston, United States at a glance

As of Sep 28, 2026

30.5%Verified-email coverage

11.9Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 123 companies.

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 engineering outsourcing firms, 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.
What qualifies: Companies headquartered in Houston, United States whose own description of what they do matches “engineering outsourcing firms”. 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 engineering outsourcing firms), 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 engineering outsourcing firms, and records with no verified work email. Companies headquartered outside Houston are excluded even when they keep an office there.
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, 445 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 28, 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.

Engineering outsourcing firms by metro in the United States

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 engineering outsourcing firms, 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 engineering outsourcing firms are there based in Houston, United States?

RevenueBase identified 123 engineering outsourcing firms headquartered in Houston, United States 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?

Zentech Incorporated, headquartered in Houston, tops this list with the largest team on record.

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

Houston leads the United States with 123 headquartered companies, followed by New York (85) and Austin (82).

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 445 verified decision-maker contacts tracked across these 123 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 28, 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.