Company lists · Data refreshed October 2026

Top 25 Engineering survey firms based in the United States

Name: Engineering survey firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 9,619 companies tracked

RevenueBase identified 9,619 company matches for engineering survey firms associated with the United States as of October 2026 and tracks 248,472 professional contacts across them, including 118,427 with verified work emails. Houston is the largest hub.

This list covers company matches for engineering survey 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 12, 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 12, 2026 How this list was built

9,619Companies

248,472Contacts tracked

118,427Verified emails

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The 25 largest engineering survey firms based in the United States

Ranked by team size

Top 25 of 9,619 company matches for engineering survey firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 12, 2026	5,001-10,000	6,380 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 12, 2026 · View company records in RevenueBase
2	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,402 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,259 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 12, 2026	n/a	2,256 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	LJA	Exact match	Houston, TX, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,148 contacts →
	Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,064 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,778 contacts →
	Exact match “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	UES	Exact match	Orlando, FL, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,643 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 12, 2026 · View company records in RevenueBase
9	GEI Consultants, INC	Exact match	Woburn, MA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,639 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Kpff Consulting Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,588 contacts →
	Exact match “KPFF is a multi-office, multi-discipline engineering firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Garver	Exact match	North Little Rock, AR, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,533 contacts →
	Exact match “Founded in 1919, Garver is an employee-owned engineering, planning, and environmental services firm focused on aviation, transportation, buildings, federal, water and wastewater…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,499 contacts →
	Exact match “Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,418 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Walter P Moore	Exact match	Houston, TX, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,404 contacts →
	Exact match “Welcome to Walter P Moore!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	GPI Greenman-Pedersen, INC	Exact match	Melville, NY, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,379 contacts →
	Exact match “With a staff of over 1,800 professionals, Greenman-Pedersen, Inc.(GPI) is a leading engineering consulting firm that specializes in the innovative design and construction of…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Volkert, INC	Exact match	Mobile, AL, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,201 contacts →
	Exact match “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Merrick & Company	Exact match	Greenwood Village, CO, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,189 contacts →
	Exact match “At Merrick, employee ownership drives us as we work alongside our clients to develop the right solutions to better our world.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Bge, INC	Exact match	Houston, TX, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,134 contacts →
	Exact match “Ranked No.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Timmons Group	Exact match	Richmond, VA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,122 contacts →
	Exact match “Timmons Group is an engineering & technology firm specializing in civil, environmental, GIS, and surveying services to clients across the US.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	David Evans And Associates, INC	Exact match	Portland, OR, United StatesHQ recorded Oct 12, 2026	501-1,000	1,068 contacts →
	Exact match “Since its founding in 1976 in Portland, Oregon, DEA has become a recognized leader for progressive and sustainable design and management solutions for complex transportation, land…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	Simpson Gumpertz & Heger SGH	Exact match	Waltham, MA, United StatesHQ recorded Oct 12, 2026	501-1,000	969 contacts →
	Exact match “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Oct 12, 2026	501-1,000	903 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 12, 2026 · View company records in RevenueBase
23	Coffman Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 12, 2026	501-1,000	889 contacts →
	Exact match “The right team is more than an advantage.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	TCS	Exact match	Plano, TX, United StatesHQ recorded Oct 12, 2026	n/a	851 contacts →
	Exact match “Tam Consulting Services LLC (TCS) provides engineering and quality services which includes construction engineering and inspection (CE & I), materials testing, program management…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Mckim & Creed, INC	Exact match	Raleigh, NC, United StatesHQ recorded Oct 12, 2026	501-1,000	838 contacts →
	Exact match “What if you had the opportunity to do something you love and make a difference in peoples' lives at the same time?” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “engineering survey firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 9,619 engineering survey firms based in the United States

See the full list, filter by size, metro and specialty, and access 118,427 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Engineering survey firms based in the United States at a glance

As of Oct 12, 2026

47.7%Verified-email coverage

25.8Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · Houston

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

4,391

11-50

3,721

51-200

1,169

201-500

205

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 9,619 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 “engineering survey 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 118,427 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 12, 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.

Engineering survey firms by metro

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 “engineering survey firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many engineering survey firms are there based in the United States?

RevenueBase identified 9,619 company matches for engineering survey 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 engineering survey firms?

Houston leads with 207 company records, followed by New York (134) and Austin (94).

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 118,427 professional contacts with verified work emails tracked across these 9,619 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 12, 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.