Company lists · Data refreshed October 2026

Top 25 Construction site investigation firms based in the United States

RevenueBase identified 1,993 company matches for construction site investigation firms associated with the United States as of October 2026 and tracks 44,854 professional contacts across them, including 20,706 with verified work emails. New York is the largest hub.

This list covers company matches for construction site investigation firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 10, 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 RevenueBase SmartSearch · Exact Recorded Oct 10, 2026 How this list was built
1,993Companies
44,854Contacts tracked
20,706Verified emails
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The 25 largest construction site investigation firms based in the United States

Ranked by team size
Top 25 of 1,993 company matches for construction site investigation firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchOlathe, KS, United StatesHQ recorded Oct 10, 20265,001-10,0006,380 contacts →

Exact match

“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2Exact matchChantilly, VA, United StatesHQ recorded Oct 10, 20261,001-5,0002,259 contacts →

Exact match

“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3Exact matchOrlando, FL, United StatesHQ recorded Oct 10, 20261,001-5,0001,643 contacts →

Exact match

“UES provides professional engineering, environmental, testing and inspection services to clients across the United States.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4Exact matchNorwood, MA, United StatesHQ recorded Oct 10, 2026501-1,000903 contacts →

Exact match

“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5Exact matchArlington Heights, IL, United StatesHQ recorded Oct 10, 20261,001-5,000776 contacts →

Exact match

“Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6Exact matchSan Antonio, TX, United StatesHQ recorded Oct 10, 2026501-1,000602 contacts →

Exact match

“Founded in 1968, Raba Kistner Inc.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7Exact matchRaleigh, NC, United StatesHQ recorded Oct 10, 20261,001-5,000541 contacts →

Exact match

“Tower Engineer Professionals was founded in 1997 by two tower-climbing engineers.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8Exact matchNew York, NY, United StatesHQ recorded Oct 10, 20261,001-5,000525 contacts →

Exact match

“Welcome to SOCOTEC in the US, Trusted Expertise, From the Ground Up.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9Exact matchKennesaw, GA, United StatesHQ recorded Oct 10, 2026501-1,000518 contacts →

Exact match

“Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10Exact matchWestmont, IL, United StatesHQ recorded Oct 10, 2026501-1,000491 contacts →

Exact match

“ENTACT is the partner of choice in solving our customer's most complex environmental remediation and geotechnical infrastructure challenges.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11Exact matchWalnut Creek, CA, United StatesHQ recorded Oct 10, 2026201-500342 contacts →

Exact match

“MKA International, Inc.(MKA) a leading multidisciplinary Construction & Engineering Consulting firm, providing seamless support and specialized services to a wide variety of…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12Exact matchRichmond, VA, United StatesHQ recorded Oct 10, 2026201-500318 contacts →

Exact match

“Established in 1881, Froehling & Robertson, Inc.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13Exact matchAnnapolis Junction, MD, United StatesHQ recorded Oct 10, 2026201-500309 contacts →

Exact match

“Hillis-Carnes Engineering Associates, Inc.(HCEA) is a Mid-Atlantic based, multi-disciplined consulting engineering firm.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14Exact matchSan Ramon, CA, United StatesHQ recorded Oct 10, 2026201-500287 contacts →

Exact match

“ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15Exact matchBothell, WA, United StatesHQ recorded Oct 10, 20261,001-5,000262 contacts →

Exact match

“CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16Exact matchLas Vegas, NV, United StatesHQ recorded Oct 10, 2026201-500218 contacts →

Exact match

“Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17Exact matchFresno, CA, United StatesHQ recorded Oct 10, 2026201-500213 contacts →

Exact match

“Employee-Owned.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18Exact matchHalfmoon, NY, United StatesHQ recorded Oct 10, 202651-200210 contacts →

Exact match

“MJ is a multi-disciplinary engineering and land surveying consulting firm with 44 years of comprehensive consultant design experience.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19Exact matchCarlsbad, CA, United StatesHQ recorded Oct 10, 202651-200203 contacts →

Exact match

“Since 1989, MC’s team of professional consultants have leveraged their extensive construction backgrounds to deliver industry-leading construction consulting and forensic…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20Exact matchNY, United StatesHQ recorded Oct 10, 2026201-500199 contacts →

Exact match

“From humble beginnings in 1991 as a 2-person company in New York City, we have now grown into a 500-person strong consulting firm, with 15 regional offices in the US (and India).”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21Exact matchHouston, TX, United StatesHQ recorded Oct 10, 202651-200199 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22Exact matchIndianapolis, IN, United StatesHQ recorded Oct 10, 202651-200198 contacts →

Exact match

“Since its beginning in 1995, Patriot has built its reputation on serving the needs of the growing development and redevelopment community.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23Exact matchIrvine, CA, United StatesHQ recorded Oct 10, 202651-200194 contacts →

Exact match

“Leighton, a Verdantas Company, provides environmental, geotechnical, materials testing, and special inspection services across the built community.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24Exact matchSan Diego, CA, United StatesHQ recorded Oct 10, 2026201-500193 contacts →

Exact match

“Geocon is a California corporation established in 1971 as a professional engineering consulting firm providing comprehensive geotechnical engineering, geotechnical…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25Exact matchDenver, CO, United StatesHQ recorded Oct 10, 2026201-500192 contacts →

Exact match

“CTL|Thompson (CTL|T) has been providing innovative engineering solutions throughout Colorado since 1971.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase

Showing 25 of 1,993 construction site investigation firms based in the United States

See the full list, filter by size, metro and specialty, and access 20,706 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Construction site investigation firms based in the United States at a glance

As of Oct 10, 2026
46.2%Verified-email coverage
22.5Average contacts per company
11-50Median size (employees)
3.1%Largest-city concentration · New York
Oct 10, 2026Page data refreshed

Companies by employee count

1-10
962
11-50
723
51-200
255
201-500
32
501-1,000
6
1,001-5,000
10
5,001-10,000
2

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 1,993 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “construction site investigation firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 20,706 professional contacts with verified work emails across the full matched dataset. 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 October 10, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “construction site investigation firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many construction site investigation firms are there based in the United States?

RevenueBase identified 1,993 company matches for construction site investigation firms associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Terracon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most construction site investigation firms?

New York leads with 61 company records, followed by Houston (39) and Dallas (24).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 20,706 professional contacts with verified work emails tracked across these 1,993 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 10, 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.