Company lists · Data refreshed September 2026

Top 25 Engineering consultancies based in Houston, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 622 companies tracked

RevenueBase identified 622 engineering consultancies headquartered in Houston, United States as of September 2026 and tracks 30,816 professional contacts across them, including 11,482 with verified work emails. Houston is the largest hub.

This list covers engineering consultancies 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 24, 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 24, 2026 86% judged on-target in blind review

622Companies

30,816Contacts tracked

11,482Verified emails

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The 25 largest engineering consultancies based in Houston, United States

Ranked by team size

Top 25 of 622 engineering consultancies based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to engineering consultancies: 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	S&b	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	5,001-10,000	3,510 contacts →
	Indirect evidence “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Source: RevenueBase Database · checked Sep 24, 2026
2	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 24, 2026
3	Audubon Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,488 contacts →
	Indirect evidence “Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.” Source: RevenueBase Database · checked Sep 24, 2026
4	Walter P Moore	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,298 contacts →
	Indirect evidence “Welcome to Walter P Moore!” Source: RevenueBase Database · checked Sep 24, 2026
5	Rimkus	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,184 contacts →
	Indirect evidence “Consultants.” Source: RevenueBase Database · checked Sep 24, 2026
6	Bge, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,112 contacts →
	Indirect evidence “Ranked No.” Source: RevenueBase Database · checked Sep 24, 2026
7	Gulf Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,046 contacts →
	Indirect evidence “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Source: RevenueBase Database · checked Sep 24, 2026
8	PBK	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	892 contacts →
	Partial evidence “PBK is an award-winning architecture, engineering and consulting practice that has been a leader in design solutions for education, healthcare, corporate, government and…” Source: RevenueBase Database · checked Sep 24, 2026
9	KBR Energo Engineering	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	n/a	789 contacts →
	Partial evidence “Energo Engineering is a KBR Company that provides the full package of structural integrity management (SIM) and advanced structural engineering services for offshore floating and…” Source: RevenueBase Database · checked Sep 24, 2026
10	Quiddity	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	501-1,000	683 contacts →
	Partial evidence “Quiddity is an award-winning, full-service civil engineering, planning, surveying, and consulting firm providing innovative solutions for public infrastructure and private…” Source: RevenueBase Database · checked Sep 24, 2026
11	Quanta Infrastructure Solutions Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	501-1,000	538 contacts →
	Indirect evidence “Quanta Infrastructure Solutions Group (QISG) is a recognized leader in EPC, design-build, and CMAR services for electrical infrastructure, wastewater and specialty projects…” Source: RevenueBase Database · checked Sep 24, 2026
12	Cobb, Fendley & Associates, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	501-1,000	524 contacts →
	Indirect evidence “Cobb, Fendley & Associates, Inc.(CobbFendley) is a nationally recognized infrastructure solutions firm with a regional focus and a commitment to excellence.” Source: RevenueBase Database · checked Sep 24, 2026
13	Lockwood, Andrews & Newnam, Inc. LAN	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	461 contacts →
	Partial evidence “Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.” Source: RevenueBase Database · checked Sep 24, 2026
14	Stress Engineering Services, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	345 contacts →
	Partial evidence “Stress Engineering Services: 50 years of turning critical uncertainty into engineering certainty.” Source: RevenueBase Database · checked Sep 24, 2026
15	Kestrel Engineering, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	318 contacts →
	Partial evidence “Kestrel provides engineering, project and construction management and inspection services to the oil and gas industries.” Source: RevenueBase Database · checked Sep 24, 2026
16	PGAL	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	312 contacts →
	Partial evidence “Founded in 1946, PGAL is a design firm specializing in architecture, engineering, interiors, and planning for a diverse portfolio of public and private sector clients.” Source: RevenueBase Database · checked Sep 24, 2026
17	ARION	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	310 contacts →
	Indirect evidence “We are A-Team of engineers specializing in the energy industry.” Source: RevenueBase Database · checked Sep 24, 2026
18	Tolunay-Wong Engineers, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	260 contacts →
	Partial evidence “Founded in 1993, Tolunay-Wong Engineers, Inc.(TWE) is ranked as one of the Top 10 largest civil engineering firms in Houston.” Source: RevenueBase Database · checked Sep 24, 2026
19	Office Of The County Engineer	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	501-1,000	248 contacts →
	Indirect evidence “Office of the County Engineer is a regional leader in providing wholly integrated professional services to a broad range of clients.” Source: RevenueBase Database · checked Sep 24, 2026
20	Ehra Engineering	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	247 contacts →
	Partial evidence “EHRA Engineering is a civil engineering, surveying, low impact developing, land planning, construction phase services, traffic, emergency management and landscape architecture…” Source: RevenueBase Database · checked Sep 24, 2026
21	NEW Tech Global	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	245 contacts →
	Indirect evidence “New Tech Global (NTG) is comprised of 5 different business units: New Tech Global Ventures: Upstream Oil & Gas consultancy services, and W-2 professional placement services for…” Source: RevenueBase Database · checked Sep 24, 2026
22	DBR	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	227 contacts →
	Partial evidence “Founded in 1972, DBR has evolved into the premier MEP engineering firm in Texas, providing mechanical, electrical, and plumbing engineering services, as well as building…” Source: RevenueBase Database · checked Sep 24, 2026
23	HVJ Associates	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	199 contacts →
	Indirect evidence “Completing public infrastructure projects comes with tremendous pressure to serve the public while completing each project on-time and on-budget.” Source: RevenueBase Database · checked Sep 24, 2026
24	IDS Engineering Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	182 contacts →
	Partial evidence “Founded in 1970, IDS Engineering Group is a Houston-based civil engineering and surveying firm with over five decades of experience delivering infrastructure solutions for public…” Source: RevenueBase Database · checked Sep 24, 2026
25	Zentech Incorporated	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 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 24, 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 consultancies. 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 consultancies.
Partial evidence: Its own public description names part of engineering consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering consultancies. 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 622 engineering consultancies based in Houston, United States

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Engineering consultancies based in Houston, United States at a glance

As of Sep 24, 2026

37.3%Verified-email coverage

49.5Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Houston

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

270

11-50

229

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 622 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 consultancies, 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 consultancies”. 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 consultancies), 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 consultancies, 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, 11,482 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 24, 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 consultancies 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 consultancies, 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 consultancies are there based in Houston, United States?

RevenueBase identified 622 engineering consultancies 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?

S&b, headquartered in Houston, tops this list with the largest team on record.

Which city has the most engineering consultancies?

Houston leads with 622 headquartered companies, followed by New York (449) and Austin (208).

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 11,482 verified decision-maker contacts tracked across these 622 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 24, 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.