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, how directly it supports the match, 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 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 Match evidence 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. Evidence rates how directly each company's own description names infrastructure consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
GolderIndirect evidence
Houston, TX, United States5,001-10,0003,183

“Golder was acquired by WSP.”

Source: company website · checked Sep 3, 2026
2Houston, TX, United StatesHQ checked Sep 3, 2026201-500453

“Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.”

Source: company website · checked Sep 3, 2026
3
PGALIndirect evidence
Houston, TX, United StatesHQ checked Sep 3, 2026201-500308

“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: company website · checked Sep 3, 2026
4
Ehra EngineeringIndirect evidence
Houston, TX, United StatesHQ checked Sep 3, 2026201-500242

“EHRA Engineering is a civil engineering, surveying, low impact developing, land planning, construction phase services, traffic, emergency management and landscape architecture…”

Source: company website · checked Sep 3, 2026
5Houston, TX, United StatesHQ checked Sep 3, 2026501-1,000241

“Office of the County Engineer is a regional leader in providing wholly integrated professional services to a broad range of clients.”

Source: company website · checked Sep 3, 2026
6
HVJ AssociatesPartial evidence
Houston, TX, United StatesHQ checked Sep 3, 202651-200202

“Completing public infrastructure projects comes with tremendous pressure to serve the public while completing each project on-time and on-budget.”

Source: company website · checked Sep 3, 2026
7
IDS Engineering GroupPartial evidence
Houston, TX, United StatesHQ checked Sep 3, 202651-200180

“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: company website · checked Sep 3, 2026
8Houston, TX, United StatesHQ checked Sep 3, 2026201-500149

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

Source: company website · checked Sep 3, 2026
9Houston, TX, United StatesHQ checked Sep 3, 202651-200132

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

Source: company website · checked Sep 3, 2026
10
Dec, NOW GFTIndirect evidence
Houston, TX, United StatesHQ checked Sep 3, 20261,001-5,000129

“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: company website · checked Sep 3, 2026
11
Othon, INCIndirect evidence
Houston, TX, United StatesHQ checked Sep 3, 202651-200123

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

Source: company website · checked Sep 3, 2026
12
RG Miller DccmPartial evidence
Houston, TX, United StatesHQ checked Sep 3, 202651-200114

“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: company website · checked Sep 3, 2026
13
S&b Infrastructure, LTDPartial evidence
Houston, TX, United StatesHQ checked Sep 3, 202651-20097

“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: company website · checked Sep 3, 2026
14
Nearterm CorporationPartial evidence
Houston, TX, United StatesHQ checked Sep 3, 202651-20080

“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: company website · checked Sep 3, 2026
15Houston, TX, United StatesHQ checked Sep 3, 202611-5066

“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: company website · checked Sep 3, 2026
16Houston, TX, United StatesHQ checked Sep 3, 202651-20065

“Civitas Engineering Group Inc.”

Source: company website · 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
11-50Median size (employees)
New YorkLargest hub · 306 HQs
Contacts with mobile numbers
Sep 3, 2026Data 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 this city, 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 evidence 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 SmartSearch, 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.
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 an evidence 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

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 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.