Company lists · Data refreshed September 2026

Top 25 Mep engineering firms based in the United States

Name: Mep engineering 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 17, 2026 4,277 companies tracked

RevenueBase identified 4,277 mep engineering firms headquartered in the United States as of September 2026 and tracks 116,052 professional contacts across them, including 54,132 with verified work emails. New York is the largest hub.

This list covers mep engineering 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 17, 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 17, 2026 86% judged on-target in blind review

4,277Companies

116,052Contacts tracked

54,132Verified emails

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The 25 largest mep engineering firms based in the United States

Ranked by team size

Top 25 of 4,277 mep engineering firms based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to mep engineering 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	Colliers Engineering & Design	Partial evidence	Holmdel, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,049 contacts →
	Partial 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 17, 2026
2	IMEG	Partial evidence	Rock Island, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,985 contacts →
	Partial evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 17, 2026
3	Bowman Consulting	Partial evidence	Reston, VA, United StatesHQ checked Sep 17, 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 17, 2026
4	Comfort Systems USA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	1,330 contacts →
	Indirect evidence “Comfort Systems USA \| Quality People.” Source: RevenueBase Database · checked Sep 17, 2026
5	Mckenney's, INC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,077 contacts →
	Indirect evidence “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
6	Henderson Engineers	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 17, 2026	501-1,000	1,040 contacts →
	Partial evidence “Henderson Engineers is a national building systems design firm with a wide array of engineering services and a portfolio representing a full range of markets including business…” Source: RevenueBase Database · checked Sep 17, 2026
7	Affiliated Engineers, INC	Partial evidence	Madison, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,012 contacts →
	Partial evidence “Affiliated Engineers, Inc.(AEI) provides engineering leadership and whole-mission solutions for complex building, energy, and utility projects.” Source: RevenueBase Database · checked Sep 17, 2026
8	Cmta, INC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 17, 2026	501-1,000	936 contacts →
	Indirect evidence “CMTA is part of Legence, a Nasdaq Listed company.” Source: RevenueBase Database · checked Sep 17, 2026
9	Stellar	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 17, 2026	501-1,000	899 contacts →
	Partial evidence “Stellar, headquartered in Jacksonville, Florida, is a fully integrated firm focusing on design, engineering, construction, refrigeration, and mechanical and electrical services…” Source: RevenueBase Database · checked Sep 17, 2026
10	Mesa Associates, INC	Partial evidence	Madison, AL, United StatesHQ checked Sep 17, 2026	1,001-5,000	897 contacts →
	Partial evidence “Mesa is a full service engineering, procurement, and construction management firm specializing in providing engineering services to electric utility, heavy industrial, and…” Source: RevenueBase Database · checked Sep 17, 2026
11	Coffman Engineers	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	501-1,000	859 contacts →
	Indirect evidence “The right team is more than an advantage.” Source: RevenueBase Database · checked Sep 17, 2026
12	PAE	Partial evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	201-500	744 contacts →
	Partial evidence “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Source: RevenueBase Database · checked Sep 17, 2026
13	Kinetics	Indirect evidence	Livermore, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	734 contacts →
	Indirect evidence “Founded in 1973, Kinetics is a full-service process and mechanical contractor specializing in the design and installation of process, mechanical, plumbing and HVAC systems.” Source: RevenueBase Database · checked Sep 17, 2026
14	ME Engineers	Indirect evidence	Golden, CO, United StatesHQ checked Sep 17, 2026	201-500	696 contacts →
	Indirect evidence “ME Engineers has earned a reputation as a global leader in the design of innovative MEPT systems that bring to life the world's most innovative sports and entertainment venues.” Source: RevenueBase Database · checked Sep 17, 2026
15	H2m Architects Engineers	Indirect evidence	Melville, NY, United StatesHQ checked Sep 17, 2026	501-1,000	692 contacts →
	Indirect evidence “About H2M H2M architects + engineers is a multi-disciplinary professional consulting and design firm, proud of its long history of client service and consistent ability to meet…” Source: RevenueBase Database · checked Sep 17, 2026
16	C&s Companies	Partial evidence	Syracuse, NY, United StatesHQ checked Sep 17, 2026	501-1,000	657 contacts →
	Partial evidence “Founded in 1968, the C&S Companies are known nationwide for client-focused engineering, architecture, planning, environmental, and construction services.” Source: RevenueBase Database · checked Sep 17, 2026
17	Whitman, Requardt And Associates, LLP	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 17, 2026	501-1,000	601 contacts →
	Partial evidence “Established in 1915, WRA is a nationally-recognized engineering, architectural and environmental planning firm with a reputation for delivering exceptional work on time and within…” Source: RevenueBase Database · checked Sep 17, 2026
18	Colonialwebb	Indirect evidence	Richmond, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	571 contacts →
	Indirect evidence “ColonialWebb is built on a simple belief: when people feel like they belong and have a purpose, they can achieve almost anything.” Source: RevenueBase Database · checked Sep 17, 2026
19	Enventure Engineering	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	501-1,000	569 contacts →
	Partial evidence “Enventure is a trusted provider of Building Engineering, Plant Design, and Compliance solutions with offices in the Chicago and delivery centres in Bangalore, Shivamogga, Hubli…” Source: RevenueBase Database · checked Sep 17, 2026
20	DLB Associates	Strong evidence	Neptune, NJ, United StatesHQ checked Sep 17, 2026	201-500	568 contacts →
	Strong evidence “DLB Associates is an MEP and Technology consulting engineering firm built for people who want to do meaningful, high-impact work.” Source: RevenueBase Database · checked Sep 17, 2026
21	F.E. Moran Group Of Companies	Indirect evidence	Northbrook, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	564 contacts →
	Indirect evidence “At F.E.” Source: RevenueBase Database · checked Sep 17, 2026
22	BL Companies	Indirect evidence	Meriden, CT, United StatesHQ checked Sep 17, 2026	201-500	550 contacts →
	Indirect evidence “BL Companies is committed to providing quality, individualized service to clients.” Source: RevenueBase Database · checked Sep 17, 2026
23	Vanderweil Engineers	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	201-500	545 contacts →
	Partial evidence “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Source: RevenueBase Database · checked Sep 17, 2026
24	Environmental AIR Systems	Indirect evidence	High Point, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	545 contacts →
	Indirect evidence “For generations, EAS Companies has been an innovative provider delivering complete solutions in mechanical, electrical, plumbing, building services, controls, and engineered…” Source: RevenueBase Database · checked Sep 17, 2026
25	Deem, LLC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 17, 2026	1,001-5,000	539 contacts →
	Indirect evidence “DEEM, LLC is a mechanical and electrical company centrally located in Fishers, Indiana with satellite offices throughout the Midwest down to the southeastern United States.” Source: RevenueBase Database · checked Sep 17, 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: mep engineering 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 mep engineering firms.
Partial evidence: Its own public description names part of mep engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mep engineering 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 4,277 mep engineering firms based in the United States

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Mep engineering firms based in the United States at a glance

As of Sep 17, 2026

46.6%Verified-email coverage

27.1Average contacts per company

11-50Median size (employees)

3.1%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,772

11-50

1,604

51-200

649

201-500

165

501-1,000

1,001-5,000

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 4,277 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 mep engineering 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 “mep engineering 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 mep engineering 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 mep engineering 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, 54,132 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 17, 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.

Mep engineering 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 mep engineering 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 mep engineering firms are there based in the United States?

RevenueBase identified 4,277 mep engineering 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?

Colliers Engineering & Design, headquartered in Holmdel, tops this list with the largest team on record.

Which city has the most mep engineering firms?

New York leads with 131 headquartered companies, followed by Houston (100) and Austin (51).

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 54,132 verified decision-maker contacts tracked across these 4,277 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 17, 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.