Company lists · Data refreshed September 2026

Top 25 Engineering consulting firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 18,075 companies tracked

RevenueBase identified 18,075 engineering consulting firms headquartered in the United States as of September 2026 and tracks 790,435 professional contacts across them, including 345,282 with verified work emails and 321,304 with mobile numbers. Houston is the largest hub.

This list covers engineering consulting firms 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 2, 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 2, 2026 86% judged on-target in blind review

18,075Companies

790,435Contacts tracked

345,282Verified emails

321,304Mobile numbers

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The 25 largest engineering consulting firms based in the United States

Ranked by team size

Top 25 of 18,075 engineering consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to engineering 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Jacobs	Indirect evidence	Dallas, TX, United States	10001+	46,472 contacts →
	Indirect evidence “At Jacobs, we're challenging today to reinvent tomorrow – delivering outcomes and solutions for the world's most complex challenges.” Source: RevenueBase Database · checked Sep 2, 2026
2	Fluor Corporation	Partial evidence	Irving, TX, United States	10001+	33,095 contacts →
	Partial evidence “Fluor Corporation is a global engineering, procurement and construction company.” Source: RevenueBase Database · checked Sep 2, 2026
3	Bechtel Corporation	Partial evidence	Reston, VA, United States	10001+	24,784 contacts →
	Partial evidence “Bechtel is a trusted engineering, construction and project management partner to industry and government.” Source: RevenueBase Database · checked Sep 2, 2026
4	HDR	Partial evidence	Fort Worth, TX, United States	10001+	15,257 contacts →
	Partial evidence “HDR is an employee-owned design firm specializing in engineering, architecture, environmental and construction services.” Source: RevenueBase Database · checked Sep 2, 2026
5	Tetra Tech	Strong evidence	Pasadena, CA, United States	10001+	13,066 contacts →
	Strong evidence “Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 2, 2026
6	Burns & Mcdonnell	Indirect evidence	Madison, WI, United States	10001+	12,478 contacts →
	Indirect evidence “At Burns & McDonnell, our engineers, construction professionals, architects, planners, technologists and scientists do more than plan, design and construct.” Source: RevenueBase Database · checked Sep 2, 2026
7	Black & Veatch	Indirect evidence	Overland Park, KS, United States	10001+	10,807 contacts →
	Indirect evidence “Black & Veatch is an employee-owned, global leader in building critical human infrastructure in Energy, Water, Digital Connectivity and Government Services.” Source: RevenueBase Database · checked Sep 2, 2026
8	WSP In The U.S	Indirect evidence	New York, NY, United States	10001+	9,318 contacts →
	Indirect evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 2, 2026
9	URS Corporation, An Aecom Company	Indirect evidence	San Francisco, CA, United States	10001+	7,722 contacts →
	Indirect evidence “URS Corporation operations are now affiliated with AECOM.” Source: RevenueBase Database · checked Sep 2, 2026
10	Sargent & Lundy	Partial evidence	Midland, TX, United States	1,001-5,000	4,145 contacts →
	Partial evidence “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Source: RevenueBase Database · checked Sep 2, 2026
11	STV	Indirect evidence	Morrisville, NC, United States	1,001-5,000	3,564 contacts →
	Indirect evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 2, 2026
12	Kleinfelder	Indirect evidence	San Diego, CA, United States	1,001-5,000	2,365 contacts →
	Indirect evidence “At Kleinfelder, we have been connecting great people to the best work since 1961.” Source: RevenueBase Database · checked Sep 2, 2026
13	KCI	Strong evidence	North Charleston, SC, United States	1,001-5,000	2,228 contacts →
	Strong evidence “KCI is a 100-percent employee-owned engineering, consulting and construction firm serving clients throughout the United States and beyond.” Source: RevenueBase Database · checked Sep 2, 2026
14	DRA Global	Partial evidence	Johannesburg, United States	1,001-5,000	2,157 contacts →
	Partial evidence “DRA Global Limited (DRA or the Group) is an international multi-disciplinary engineering, project delivery and operations management group, predominantly focused on the mining…” Source: RevenueBase Database · checked Sep 2, 2026
15	Langan Engineering & Environmental Services	Indirect evidence	El Segundo, CA, United States	1,001-5,000	2,136 contacts →
	Indirect evidence “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Source: RevenueBase Database · checked Sep 2, 2026
16	Olsson	Partial evidence	Phoenix, AZ, United States	1,001-5,000	2,130 contacts →
	Partial evidence “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Source: RevenueBase Database · checked Sep 2, 2026
17	LJA	Indirect evidence	Sarasota, FL, United States	1,001-5,000	2,073 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 2, 2026
18	Enercon Services, INC	Partial evidence	Palm Beach Gardens, FL, United States	1,001-5,000	1,840 contacts →
	Partial evidence “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Source: RevenueBase Database · checked Sep 2, 2026
19	Johnson, Mirmiran & Thompson	Partial evidence	Dover, DE, United States	1,001-5,000	1,677 contacts →
	Partial evidence “Johnson, Mirmiran & Thompson is an employee owned, multi-disciplined firm offering a full array of planning, design, and construction phase consulting services for infrastructure…” Source: RevenueBase Database · checked Sep 2, 2026
20	Jensen Hughes	Partial evidence	Greenville, SC, United States	1,001-5,000	1,642 contacts →
	Partial evidence “Worldwide, we are most recognized for our leadership in fire protection engineering, a tradition of responsibility we have advanced with pride since 1939.” Source: RevenueBase Database · checked Sep 2, 2026
21	Westwood Professional Services	Indirect evidence	Lake Charles, LA, United States	1,001-5,000	1,631 contacts →
	Indirect evidence “At Westwood, our purpose is to create a better world for people through our work.” Source: RevenueBase Database · checked Sep 2, 2026
22	UES	Partial evidence	Houston, TX, United States	1,001-5,000	1,571 contacts →
	Partial evidence “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Source: RevenueBase Database · checked Sep 2, 2026
23	CRB	Strong evidence	Plymouth Meeting, PA, United States	1,001-5,000	1,548 contacts →
	Strong evidence “CRB is a leading provider of sustainable engineering, architecture, construction and consulting solutions to the global life sciences and food & beverage industries.” Source: RevenueBase Database · checked Sep 2, 2026
24	Labella Associates	Indirect evidence	New York, United States	1,001-5,000	1,465 contacts →
	Indirect evidence “At LaBella Associates, our job is to create – structures, plans, ideas, results.” Source: RevenueBase Database · checked Sep 2, 2026
25	Freese And Nichols	Strong evidence	Greensboro, NC, United States	1,001-5,000	1,461 contacts →
	Strong evidence “Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Source: RevenueBase Database · checked Sep 2, 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: engineering consulting firms. 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 engineering consulting firms.
Partial evidence: Its own public description names part of engineering consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering consulting firms. 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 18,075 engineering consulting firms based in the United States

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Engineering consulting firms based in the United States at a glance

As of Sep 2, 2026

43.7%Verified-email coverage

40.6%Mobile-number coverage

43.7Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · Houston

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

8,474

11-50

6,393

51-200

2,245

201-500

506

501-1,000

168

1,001-5,000

174

10001+

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 engineering 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 the United States whose own description of what they do matches “engineering 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 engineering 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 engineering consulting firms, 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, 345,282 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 2, 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.

Engineering consulting firms 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 engineering 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 engineering consulting firms are there based in the United States?

RevenueBase identified 18,075 engineering consulting firms 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?

Jacobs, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most engineering consulting firms?

Houston leads with 531 headquartered companies, followed by New York (397) and Austin (206).

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 345,282 verified decision-maker contacts tracked across these 18,075 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 2, 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.