Company lists · Data refreshed September 2026

Top 16 Infrastructure consulting firms based in Houston, United States

RevenueBase identified 293 infrastructure consulting firms headquartered in Houston, United States as of September 2026 and tracks 15,154 professional contacts across them, including 5,635 with verified work emails. New York is the largest hub.

This list covers infrastructure consulting 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 3, 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 RevenueBase Smart Search rating on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
293Companies
15,154Contacts tracked
5,635Verified emails
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The 16 largest infrastructure consulting firms based in Houston, United States

Ranked by team size
Top 16 of 293 infrastructure consulting firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure consulting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceHouston, TX, United States5,001-10,0003,183 contacts →

Indirect evidence

“Golder was acquired by WSP.”

Source: RevenueBase Database · checked Sep 3, 2026
2Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 2026201-500453 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 3, 2026
3Indirect evidenceHouston, TX, United StatesHQ checked Sep 3, 2026201-500308 contacts →

Indirect 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 3, 2026
4Indirect evidenceHouston, TX, United StatesHQ checked Sep 3, 2026201-500242 contacts →

Indirect 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 3, 2026
5Indirect evidenceHouston, TX, United StatesHQ checked Sep 3, 2026501-1,000241 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 3, 2026
6Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-200202 contacts →

Partial 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 3, 2026
7Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-200180 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 3, 2026
8Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 2026201-500149 contacts →

Partial evidence

“Critical Energy Infrastructure Services (CEIS) is a nationally recognized leader in delivering strategic project solutions that support America’s energy infrastructure and…”

Source: RevenueBase Database · checked Sep 3, 2026
9Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-200132 contacts →

Partial evidence

“Shah Smith & Associates, Inc.(SSA) is a 120+ employee Mechanical, Electrical, and Plumbing (MEP) consulting engineering firm with offices in Houston, Austin & Dallas.”

Source: RevenueBase Database · checked Sep 3, 2026
10Indirect evidenceHouston, TX, United StatesHQ checked Sep 3, 20261,001-5,000129 contacts →

Indirect evidence

“Gannett Fleming is a privately held AEC firm partnering closely with our clients on some of the toughest challenges facing our communities today-and into the future.”

Source: RevenueBase Database · checked Sep 3, 2026
11Indirect evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-200123 contacts →

Indirect evidence

“OTHON is a multi-discipline civil engineering firm.”

Source: RevenueBase Database · checked Sep 3, 2026
12Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-200114 contacts →

Partial evidence

“RG Miller | DCCM is a Houston-based civil engineering firm providing a wide range of infrastructure services to both public and private sector clients in Texas.”

Source: RevenueBase Database · checked Sep 3, 2026
13Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-20097 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 3, 2026
14Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-20080 contacts →

Partial evidence

“Based in Houston, Texas, Nearterm Corporation is one of the nation’s leading executive search, interim staffing and consulting firms with two distinct market focuses in Healthcare…”

Source: RevenueBase Database · checked Sep 3, 2026
15Partial evidenceHouston, TX, United StatesHQ checked Sep 3, 202611-5066 contacts →

Partial evidence

“Sowells Consulting Engineers (SCE), established in 2010, is a professional services consulting firm specializing in leading project teams and providing quality control during the…”

Source: RevenueBase Database · checked Sep 3, 2026
16Indirect evidenceHouston, TX, United StatesHQ checked Sep 3, 202651-20065 contacts →

Indirect evidence

“Civitas Engineering Group Inc.”

Source: RevenueBase Database · checked Sep 3, 2026

Showing 16 of 293 infrastructure consulting firms based in Houston, United States

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Infrastructure consulting firms based in Houston, United States at a glance

As of Sep 3, 2026
37.2%Verified-email coverage
51.7Average contacts per company
11-50Median size (employees)
104.4%Largest-city concentration · New York
Sep 3, 2026Page data refreshed

Companies by employee count

1-10
118
11-50
116
51-200
39
201-500
6
501-1,000
7
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 293 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 infrastructure consulting 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 “infrastructure consulting 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 infrastructure consulting 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 infrastructure consulting 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, 5,635 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 3, 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.

Infrastructure consulting 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 infrastructure consulting 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 infrastructure consulting firms are there based in Houston, United States?

RevenueBase identified 293 infrastructure consulting 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?

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

Which city has the most infrastructure consulting firms?

New York leads with 306 headquartered companies, followed by Houston (293) and Washington (158).

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 5,635 verified decision-maker contacts tracked across these 293 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 3, 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.