Company lists · Data refreshed September 2026

Top 25 Engineering and manufacturing consulting firms based in the United States

Name: Engineering and manufacturing 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 29, 2026 10,640 companies tracked

RevenueBase identified 10,640 engineering and manufacturing consulting firms headquartered in the United States as of September 2026 and tracks 252,207 professional contacts across them, including 102,464 with verified work emails and 97,652 with mobile numbers. Houston is the largest hub.

This list covers engineering and manufacturing 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 29, 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 29, 2026 86% judged on-target in blind review

10,640Companies

252,207Contacts tracked

102,464Verified emails

97,652Mobile numbers

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The 25 largest engineering and manufacturing consulting firms based in the United States

Ranked by team size

Top 25 of 10,640 engineering and manufacturing consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to engineering and manufacturing 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	Plexus Corp	Indirect evidence	Neenah, NC, United StatesHQ checked Sep 29, 2026	10001+	8,149 contacts →
	Indirect evidence “Since 1979, Plexus has been partnering with companies to create the products that build a better world.” Source: RevenueBase Database · checked Sep 29, 2026
2	Terracon	Strong evidence	Olathe, KS, United StatesHQ checked Sep 29, 2026	5,001-10,000	6,113 contacts →
	Strong evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 29, 2026
3	Benchmark	Strong evidence	Tempe, AZ, United StatesHQ checked Sep 29, 2026	10001+	5,362 contacts →
	Strong evidence “Benchmark is a worldwide provider of innovative product design, engineering services, technology solutions and advanced manufacturing services.” Source: RevenueBase Database · checked Sep 29, 2026
4	Power Engineers	Indirect evidence	Hailey, ID, United StatesHQ checked Sep 29, 2026	1,001-5,000	4,013 contacts →
	Indirect evidence “POWER Engineers is now part of WSP.” Source: RevenueBase Database · checked Sep 29, 2026
5	Ips-Integrated Project Services	Strong evidence	Blue Bell, PA, United StatesHQ checked Sep 29, 2026	1,001-5,000	3,577 contacts →
	Strong evidence “IPS, a Berkshire Hathaway company, is a global leader in technical consulting, architecture, engineering, procurement, construction management, commissioning, qualification…” Source: RevenueBase Database · checked Sep 29, 2026
6	Entrust Solutions Group	Strong evidence	Lisle, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,966 contacts →
	Strong evidence “ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: RevenueBase Database · checked Sep 29, 2026
7	VEE Technologies	Partial evidence	Decatur, GA, United StatesHQ checked Sep 29, 2026	5,001-10,000	2,933 contacts →
	Partial evidence “Vee Technologies is a global consulting and professional services organization delivering specialized, technology-enabled solutions.” Source: RevenueBase Database · checked Sep 29, 2026
8	Hexagon Asset Lifecycle Intelligence	Indirect evidence	Madison, AL, United StatesHQ checked Sep 29, 2026	10001+	2,630 contacts →
	Indirect evidence “Hexagon’s Asset Lifecycle Intelligence division helps clients design, construct and operate more profitable, safe and sustainable industrial facilities.” Source: RevenueBase Database · checked Sep 29, 2026
9	The Haskell Company	Strong evidence	Jacksonville, FL, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,213 contacts →
	Strong evidence “Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Source: RevenueBase Database · checked Sep 29, 2026
10	ECS Group Of Companies	Strong evidence	Chantilly, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,210 contacts →
	Strong evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 29, 2026
11	Colliers Engineering & Design	Strong evidence	Holmdel, NJ, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,049 contacts →
	Strong evidence “Colliers Engineering & Design, an affiliate of Colliers, is a trusted provider of multi-discipline engineering and architecture, design and consulting services to public and…” Source: RevenueBase Database · checked Sep 29, 2026
12	IMEG	Partial evidence	Rock Island, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,985 contacts →
	Partial evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 29, 2026
13	Hargrove Engineers & Constructors	Partial evidence	Mobile, AL, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,877 contacts →
	Partial evidence “Hargrove is a full-service engineering, procurement, and construction management firm delivering multi-discipline engineering, project delivery, controls & automation, and…” Source: RevenueBase Database · checked Sep 29, 2026
14	Caresoft Global	Partial evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,860 contacts →
	Partial evidence “We are a global engineering solutions company working closely with major Automotive, On-Highway, Agriculture & Construction Equipment Manufacturers and Tier-I Suppliers to solve…” Source: RevenueBase Database · checked Sep 29, 2026
15	Bowman Consulting	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 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 29, 2026
16	CHA Consulting, INC	Strong evidence	Albany, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,639 contacts →
	Strong evidence “CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…” Source: RevenueBase Database · checked Sep 29, 2026
17	GEI Consultants, INC	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,604 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
18	Ssoe Group	Partial evidence	Toledo, OH, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,603 contacts →
	Partial evidence “As an internationally ranked architecture and engineering firm, SSOE is known for delivering unparalleled client value that advances the AEC industry.” Source: RevenueBase Database · checked Sep 29, 2026
19	Alliantgroup	Strong evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,595 contacts →
	Strong evidence “alliant is the nation's premier consulting and management engineering firm.” Source: RevenueBase Database · checked Sep 29, 2026
20	Exponent	Strong evidence	Menlo Park, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,560 contacts →
	Strong evidence “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Source: RevenueBase Database · checked Sep 29, 2026
21	BW Design Group	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,555 contacts →
	Indirect evidence “BW Design Group is the only independent, fully integrated AEC firm powered by a Manufacturer's Mindset™.” Source: RevenueBase Database · checked Sep 29, 2026
22	Kpff Consulting Engineers	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,487 contacts →
	Partial evidence “KPFF is a multi-office, multi-discipline engineering firm.” Source: RevenueBase Database · checked Sep 29, 2026
23	Davey Resource Group, INC	Partial evidence	Kent, OH, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,395 contacts →
	Partial evidence “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” Source: RevenueBase Database · checked Sep 29, 2026
24	GPI Greenman-Pedersen, INC	Strong evidence	Melville, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,354 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
25	Atwell, LLC	Strong evidence	Southfield, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,290 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 29, 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 and manufacturing 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 and manufacturing consulting firms.
Partial evidence: Its own public description names part of engineering and manufacturing 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 and manufacturing 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 10,640 engineering and manufacturing consulting firms based in the United States

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Engineering and manufacturing consulting firms based in the United States at a glance

As of Sep 29, 2026

40.6%Verified-email coverage

38.7%Mobile-number coverage

23.7Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,084

11-50

2,992

51-200

1,132

201-500

249

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 31.0d

45,0600–30

56,28231–60

3,22861–90

7090–180

619180+

Company record updated

Median 92.0d

00–30

56,52631–60

58,48761–90

134,20390–180

13,215180+

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 and manufacturing 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 and manufacturing 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 and manufacturing 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 and manufacturing 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, 102,464 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 29, 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 and manufacturing 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 and manufacturing 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 and manufacturing consulting firms are there based in the United States?

RevenueBase identified 10,640 engineering and manufacturing 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?

Plexus Corp, headquartered in Raleigh, tops this list with the largest team on record.

Which city has the most engineering and manufacturing consulting firms?

Houston leads with 324 headquartered companies, followed by New York (187) and Chicago (130).

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 102,464 verified decision-maker contacts tracked across these 10,640 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 29, 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.