Company lists · Data refreshed September 2026

Top 25 Data center mechanical contractors based in the United States

RevenueBase identified 7,001 data center mechanical contractors headquartered in the United States as of September 2026 and tracks 148,422 professional contacts across them, including 55,652 with verified work emails. Houston is the largest hub.

This list covers data center mechanical contractors 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 16, 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 16, 2026 86% judged on-target in blind review
7,001Companies
148,422Contacts tracked
55,652Verified emails
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The 25 largest data center mechanical contractors based in the United States

Ranked by team size
Top 25 of 7,001 data center mechanical contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to data center mechanical contractors: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceColumbus, OH, United StatesHQ checked Sep 16, 202610001+6,538 contacts →

Indirect evidence

“In August 2016, Emerson announced the sale of the Network Power business to Platinum Equity and a group of co-investors.”

Source: RevenueBase Database · checked Sep 16, 2026
2Indirect evidenceGarden Grove, CA, United StatesHQ checked Sep 16, 202610001+2,439 contacts →

Indirect evidence

“As one of the nation's largest building systems experts, Southland Industries provides innovative, practical results for your engineering, construction, service, and energy needs.”

Source: RevenueBase Database · checked Sep 16, 2026
3Partial evidencePasadena, CA, United StatesHQ checked Sep 16, 20265,001-10,0002,415 contacts →

Partial evidence

“Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain more than mechanical projects.”

Source: RevenueBase Database · checked Sep 16, 2026
4Partial evidenceNorwalk, CT, United StatesHQ checked Sep 16, 202610001+1,383 contacts →

Partial evidence

“A Fortune 500® company and a member of the S&P 500, EMCOR Group, Inc.(NYSE: EME) is a leader in mechanical and electrical construction, industrial and energy infrastructure, and…”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceHouston, TX, United StatesHQ checked Sep 16, 202610001+1,330 contacts →

Indirect evidence

“Comfort Systems USA | Quality People.”

Source: RevenueBase Database · checked Sep 16, 2026
6Strong evidenceSeatac, WA, United StatesHQ checked Sep 16, 20261,001-5,0001,303 contacts →

Strong evidence

“MacDonald-Miller Facility Solutions is a full-service, design-build mechanical contractor in the Pacific Northwest.”

Source: RevenueBase Database · checked Sep 16, 2026
7Indirect evidenceAtlanta, GA, United StatesHQ checked Sep 16, 20261,001-5,0001,077 contacts →

Indirect evidence

“McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.”

Source: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceParsippany, NJ, United StatesHQ checked Sep 16, 20261,001-5,0001,017 contacts →

Indirect evidence

“GSH Group is a premier provider of global integrated facilities management and building engineering services.”

Source: RevenueBase Database · checked Sep 16, 2026
9Strong evidenceSt Paul, MN, United StatesHQ checked Sep 16, 20261,001-5,000982 contacts →

Strong evidence

“Harris is a leading national mechanical contractor specializing in design and engineering, construction, controls, service, manufacturing, conveyors and end-to-end building…”

Source: RevenueBase Database · checked Sep 16, 2026
10Indirect evidenceLouisville, KY, United StatesHQ checked Sep 16, 2026501-1,000936 contacts →

Indirect evidence

“CMTA is part of Legence, a Nasdaq Listed company.”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceJessup, MD, United StatesHQ checked Sep 16, 20261,001-5,000906 contacts →

Indirect evidence

“At BAC, we don’t just build cooling systems, we shape the future of sustainable solutions.”

Source: RevenueBase Database · checked Sep 16, 2026
12Partial evidenceJacksonville, FL, United StatesHQ checked Sep 16, 2026501-1,000899 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 16, 2026
13Strong evidenceFond Du Lac, WI, United StatesHQ checked Sep 16, 20261,001-5,000849 contacts →

Strong evidence

“Ahern is a mechanical and fire protection contractor specializing in HVAC, Plumbing, Building Controls, Sprinkler, Extinguisher & Alarm and Fabrication for construction and…”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceNew York, United StatesHQ checked Sep 16, 2026501-1,000803 contacts →

Indirect evidence

“Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.”

Source: RevenueBase Database · checked Sep 16, 2026
15Indirect evidenceBrea, CA, United StatesHQ checked Sep 16, 20261,001-5,000750 contacts →

Indirect evidence

“CoolSys solves the most complex challenges in refrigeration, air conditioning, heating, engineering, and energy management.”

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceTampa, FL, United StatesHQ checked Sep 16, 20261,001-5,000745 contacts →

Indirect evidence

“Limbach is a leading building solutions firm delivering mission critical infrastructure that supports life’s most important moments.”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceSt. Louis, MO, United StatesHQ checked Sep 16, 20261,001-5,000744 contacts →

Indirect evidence

“ArchKey, one of the largest privately held specialty trade installation and facilities services companies in the United States, is a leader in designing, building, and maintaining…”

Source: RevenueBase Database · checked Sep 16, 2026
18Strong evidenceLivermore, CA, United StatesHQ checked Sep 16, 20261,001-5,000734 contacts →

Strong 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 16, 2026
19Partial evidenceKennewick, WA, United StatesHQ checked Sep 16, 20261,001-5,000682 contacts →

Partial evidence

“Apollo is based in Kennewick, Washington, performing Full Mechanical projects across the United States and around the world.”

Source: RevenueBase Database · checked Sep 16, 2026
20Partial evidenceAnkeny, IA, United StatesHQ checked Sep 16, 20261,001-5,000655 contacts →

Partial evidence

“Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.”

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceRichmond, VA, United StatesHQ checked Sep 16, 20261,001-5,000571 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 16, 2026
22Indirect evidenceNorthbrook, IL, United StatesHQ checked Sep 16, 20261,001-5,000564 contacts →

Indirect evidence

“At F.E.”

Source: RevenueBase Database · checked Sep 16, 2026
23Indirect evidenceGlendale Heights, IL, United StatesHQ checked Sep 16, 20261,001-5,000554 contacts →

Indirect evidence

“At Climate Pros, LLC, we are a leading commercial refrigeration and HVAC company specializing in the design, construction, and servicing of refrigeration systems across thousands…”

Source: RevenueBase Database · checked Sep 16, 2026
24Partial evidenceHigh Point, NC, United StatesHQ checked Sep 16, 20261,001-5,000545 contacts →

Partial 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 16, 2026
25Strong evidenceIndianapolis, IN, United StatesHQ checked Sep 16, 20261,001-5,000539 contacts →

Strong 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 16, 2026

Showing 25 of 7,001 data center mechanical contractors based in the United States

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Data center mechanical contractors based in the United States at a glance

As of Sep 16, 2026
37.5%Verified-email coverage
21.2Average contacts per company
11-50Median size (employees)
1.7%Largest-city concentration · Houston
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
2,537
11-50
2,727
51-200
1,236
201-500
286
501-1,000
98
1,001-5,000
55
5,001-10,000
6
10001+
10

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 7,001 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 data center mechanical contractors, 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 “data center mechanical contractors”. 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 data center mechanical contractors), 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 data center mechanical contractors, 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, 55,652 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 16, 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.

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 data center mechanical contractors, 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 data center mechanical contractors are there based in the United States?

RevenueBase identified 7,001 data center mechanical contractors 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?

Emerson Network Power, headquartered in Columbus, tops this list with the largest team on record.

Which city has the most data center mechanical contractors?

Houston leads with 118 headquartered companies, followed by New York (108) and Phoenix (54).

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 55,652 verified decision-maker contacts tracked across these 7,001 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 16, 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.