Company lists · Data refreshed September 2026

Top 25 Infrastructure inspection companies based in the United States

Name: Infrastructure inspection companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 2,506 companies tracked

RevenueBase identified 2,506 infrastructure inspection companies headquartered in the United States as of September 2026 and tracks 93,748 professional contacts across them, including 37,603 with verified work emails. Houston is the largest hub.

This list covers infrastructure inspection companies headquartered in the 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 20, 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 20, 2026 86% judged on-target in blind review

2,506Companies

93,748Contacts tracked

37,603Verified emails

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The 25 largest infrastructure inspection companies based in the United States

Ranked by team size

Top 25 of 2,506 infrastructure inspection companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure inspection companies: 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	HNTB	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	5,001-10,000	7,469 contacts →
	Partial evidence “For over a century, HNTB has shaped the built environment with distinctive expertise across a full spectrum of infrastructure solutions.” Source: RevenueBase Database · checked Sep 20, 2026
2	Acuren	Indirect evidence	Tomball, TX, United StatesHQ checked Sep 20, 2026	5,001-10,000	3,734 contacts →
	Indirect evidence “Acuren (NYSE: TIC) is a leading provider of critical asset integrity services.” Source: RevenueBase Database · checked Sep 20, 2026
3	Mistras Group	Indirect evidence	Princeton Junction, NJ, United StatesHQ checked Sep 20, 2026	5,001-10,000	2,887 contacts →
	Indirect evidence “MISTRAS Group, Inc.(NYSE: MG) is a global leader in technology-enabled industrial asset integrity solutions, serving critical industries including oil & gas, aerospace & defense…” Source: RevenueBase Database · checked Sep 20, 2026
4	Kleinfelder	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,344 contacts →
	Indirect evidence “At Kleinfelder, we have been connecting great people to the best work since 1961.” Source: RevenueBase Database · checked Sep 20, 2026
5	Osmose	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	5,001-10,000	2,026 contacts →
	Indirect evidence “We are field technicians, professional engineers, wood scientists, and steel corrosion experts, leveraging more than 90 years of expertise to identify and solve structural issues…” Source: RevenueBase Database · checked Sep 20, 2026
6	Bowman Consulting	Partial evidence	Reston, VA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,666 contacts →
	Partial evidence “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Source: RevenueBase Database · checked Sep 20, 2026
7	UES	Partial evidence	Orlando, FL, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,595 contacts →
	Partial evidence “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Source: RevenueBase Database · checked Sep 20, 2026
8	ATLAS	Partial evidence	Denver, CO, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,529 contacts →
	Partial evidence “Atlas Technical Consultants (Atlas) provides professional testing, inspection, engineering, environmental and consulting services nationwide.” Source: RevenueBase Database · checked Sep 20, 2026
9	Mears Group, INC	Partial evidence	Englewood, CO, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,143 contacts →
	Partial evidence “Mears is an industry-leading energy infrastructure solutions provider offering engineering, construction and maintenance services to the oil and natural gas, electric transmission…” Source: RevenueBase Database · checked Sep 20, 2026
10	Tuboscope	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	10001+	1,008 contacts →
	Indirect evidence “For more than 85 years, Tuboscope™ has provided the industry with tubular expertise and an integrated suite of value-added solutions.” Source: RevenueBase Database · checked Sep 20, 2026
11	Applied Technical Services, LLC	Partial evidence	Marietta, GA, United StatesHQ checked Sep 20, 2026	1,001-5,000	890 contacts →
	Partial evidence “Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.” Source: RevenueBase Database · checked Sep 20, 2026
12	KBR Energo Engineering	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	n/a	789 contacts →
	Indirect 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 20, 2026
13	Matrix Service Company	Indirect evidence	Tulsa, OK, United StatesHQ checked Sep 20, 2026	1,001-5,000	785 contacts →
	Indirect evidence “Matrix Service Company (Nasdaq: MTRX) is a leading specialty engineering and construction company whose commitment to safety, quality, and integrity has earned its subsidiaries a…” Source: RevenueBase Database · checked Sep 20, 2026
14	Professional Service Industries, Inc. PSI	Indirect evidence	Arlington Heights, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	778 contacts →
	Indirect evidence “Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…” Source: RevenueBase Database · checked Sep 20, 2026
15	Tulsa Inspection Resources, LLC	Partial evidence	Tulsa, OK, United StatesHQ checked Sep 20, 2026	1,001-5,000	770 contacts →
	Partial evidence “Core capabilities include: Inspection Services (Chief, CWI, NACE/AMPP, Utility, Environmental, Safety, Poly, etc), Non-Destructive Examination (Ultrasonic Testing (UT), Phased…” Source: RevenueBase Database · checked Sep 20, 2026
16	GPRS	Indirect evidence	Maumee, OH, United StatesHQ checked Sep 20, 2026	501-1,000	736 contacts →
	Indirect evidence “Creating possibility for our team members and clients by Intelligently Visualizing the Built World is who we are.” Source: RevenueBase Database · checked Sep 20, 2026
17	Dragados Usa, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	716 contacts →
	Indirect evidence “Dragados USA is now FlatironDragados.” Source: RevenueBase Database · checked Sep 20, 2026
18	Tower Engineering Professionals	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	707 contacts →
	Indirect evidence “Tower Engineer Professionals was founded in 1997 by two tower-climbing engineers.” Source: RevenueBase Database · checked Sep 20, 2026
19	Structural Technologies	Partial evidence	Columbia, MD, United StatesHQ checked Sep 20, 2026	1,001-5,000	658 contacts →
	Partial evidence “STRUCTURAL TECHNOLOGIES develops, markets, and integrates proprietary products with specialty engineering services to improve, protect, and enhance infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
20	Zeitview	Strong evidence	Santa Monica, CA, United StatesHQ checked Sep 20, 2026	501-1,000	640 contacts →
	Strong evidence “For global customers in energy and infrastructure, Zeitview builds advanced inspection software that delivers fast, accurate insights, lowers costs, and improves asset performance…” Source: RevenueBase Database · checked Sep 20, 2026
21	Structural	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 20, 2026	1,001-5,000	611 contacts →
	Indirect evidence “STRUCTURAL integrates technology-driven solutions into its industry-leading specialty contracting services.” Source: RevenueBase Database · checked Sep 20, 2026
22	Raba Kistner, INC	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 20, 2026	501-1,000	582 contacts →
	Indirect evidence “Founded in 1968, Raba Kistner Inc.” Source: RevenueBase Database · checked Sep 20, 2026
23	Ohla USA	Partial evidence	East Elmhurst, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	544 contacts →
	Partial evidence “OHLA USA is a leader in the construction industry, backed by a 100-year legacy of delivering complex civil infrastructure projects worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
24	H&h	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	501-1,000	530 contacts →
	Partial evidence “With more than 139 years of experience, H&H is a trusted, full-service infrastructure engineering firm delivering complex, forward-looking solutions that advance our clients’…” Source: RevenueBase Database · checked Sep 20, 2026
25	Quality Integrated Services, Inc. QIS	Partial evidence	Guymon, OK, United StatesHQ checked Sep 20, 2026	1,001-5,000	524 contacts →
	Partial evidence “We’ve been a leader in the inspection and construction industry for over 25 years.” Source: RevenueBase Database · checked Sep 20, 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: infrastructure inspection companies. 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 infrastructure inspection companies.
Partial evidence: Its own public description names part of infrastructure inspection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure inspection companies. 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 2,506 infrastructure inspection companies based in the United States

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Infrastructure inspection companies based in the United States at a glance

As of Sep 20, 2026

40.1%Verified-email coverage

37.4Average contacts per company

11-50Median size (employees)

5.4%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,033

11-50

792

51-200

425

201-500

137

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,506 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 inspection companies, 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 the United States whose own description of what they do matches “infrastructure inspection companies”. 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 inspection companies), 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 inspection companies, and records with no verified work email. Companies headquartered outside United States 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, 37,603 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 20, 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 inspection companies by metro

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 inspection companies, 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 inspection companies are there based in the United States?

RevenueBase identified 2,506 infrastructure inspection companies headquartered in the 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?

HNTB, headquartered in Kansas City, tops this list with the largest team on record.

Which city has the most infrastructure inspection companies?

Houston leads with 136 headquartered companies, followed by New York (54) and Miami (43).

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 37,603 verified decision-maker contacts tracked across these 2,506 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 20, 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.