Company lists · Data refreshed September 2026

Top 25 Data center design and build firms worldwide

RevenueBase identified 4,248 data center design and build firms worldwide as of September 2026 and tracks 148,351 professional contacts across them, including 52,812 with verified work emails. The United States is the largest market and London the largest hub.

This list covers data center design and build firms worldwide, 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 19, 2026. Country and city lists for data center design and build firms follow the table.

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 19, 2026 86% judged on-target in blind review
4,248Companies
148,351Contacts tracked
52,812Verified emails
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The 25 largest data center design and build firms worldwide

Ranked by team size
Top 25 of 4,248 data center design and build firms worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to data center design and build 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceColumbus, OH, United StatesHQ checked Sep 19, 202610001+14,610 contacts →

Strong evidence

“Vertiv is a global leader in critical digital infrastructure for applications in data centers, communication networks, and commercial and industrial environments.”

Source: RevenueBase Database · checked Sep 19, 2026
2Indirect evidenceDublin, IrelandHQ checked Sep 19, 20261,001-5,0003,672 contacts →

Indirect evidence

“At PM Group, our vision is to enable a world where science and technology transform lives.”

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceTysons, VA, United StatesHQ checked Sep 19, 20265,001-10,0002,761 contacts →

Indirect evidence

“M.C.”

Source: RevenueBase Database · checked Sep 19, 2026
4Strong evidenceDenver, CO, United StatesHQ checked Sep 19, 20261,001-5,0002,090 contacts →

Strong evidence

“Vantage Data Centers is a global provider of digital infrastructure serving AI and cloud innovators.”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidenceSterling, VA, United StatesHQ checked Sep 19, 20261,001-5,0002,009 contacts →

Indirect evidence

“Digital infrastructure leader driven by purpose, innovation and community impact.”

Source: RevenueBase Database · checked Sep 19, 2026
6Indirect evidenceHyderabad, IndiaHQ checked Sep 19, 20261,001-5,0001,942 contacts →

Indirect evidence

“Since its inception in 2007, CtrlS has been a frontrunner in the datacenter industry with the largest Rated-4 datacenter footprint.”

Source: RevenueBase Database · checked Sep 19, 2026
7Strong evidenceKennesaw, GA, United StatesHQ checked Sep 19, 20261,001-5,0001,865 contacts →

Strong 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 19, 2026
8Strong evidenceLondon, United KingdomHQ checked Sep 19, 20261,001-5,0001,842 contacts →

Strong evidence

“NTT Global Data Centers is a division of NTT DATA.”

Source: RevenueBase Database · checked Sep 19, 2026
9Indirect evidenceBrasilia, BrazilHQ checked Sep 19, 20265,001-10,0001,810 contacts →

Indirect evidence

“A RCS é uma empresa de Engenharia especializada em oferecer serviços técnicos de missão crítica com alta tecnologia aplicada, para clientes que necessitam manter suas atividades…”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceTempe, AZ, United StatesHQ checked Sep 19, 20261,001-5,0001,800 contacts →

Indirect evidence

“IES Communications a division of IES (NASDAQ: IESC) provides each client with a team of highly qualified dedicated professionals that deliver superior quality and cost effective…”

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceBoulder, CO, United StatesHQ checked Sep 19, 20261,001-5,0001,676 contacts →

Indirect evidence

“Congruex was formed in 2017 to take advantage of historic demand for digital connectivity.”

Source: RevenueBase Database · checked Sep 19, 2026
12Strong evidenceSan Diego, CA, United StatesHQ checked Sep 19, 20261,001-5,0001,560 contacts →

Strong evidence

“Helix Electric is an award-winning electrical contractor specializing in design-build and highly complex electrical projects throughout the United States.”

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceLimerick, IrelandHQ checked Sep 19, 20261,001-5,0001,486 contacts →

Indirect evidence

“Founded in 1964, Kirby is a leading Mechanical and Electrical engineering contractor with operations in Ireland, the UK, mainland Europe and South Africa.”

Source: RevenueBase Database · checked Sep 19, 2026
14Partial evidenceFremont, CA, United StatesHQ checked Sep 19, 202610001+1,138 contacts →

Partial evidence

“Hyve Solutions is a leader in the design to worldwide deployment of hyperscale digital infrastructures.”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceWembley, United KingdomHQ checked Sep 19, 20261,001-5,0001,053 contacts →

Indirect evidence

“Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.”

Source: RevenueBase Database · checked Sep 19, 2026
16Strong evidenceLas Vegas, NV, United StatesHQ checked Sep 19, 20261,001-5,0001,049 contacts →

Strong evidence

“Switch was founded in by CEO Rob Roy and stands at the forefront as the premier data center designer, builder and operator, owning 100% of its land and facilities.”

Source: RevenueBase Database · checked Sep 19, 2026
17Indirect evidenceDenver, CO, United StatesHQ checked Sep 19, 20261,001-5,0001,036 contacts →

Indirect evidence

“STACK provides digital infrastructure to scale the world’s most innovative companies.”

Source: RevenueBase Database · checked Sep 19, 2026
18Strong evidenceSao Paulo, BrazilHQ checked Sep 19, 20261,001-5,0001,017 contacts →

Strong evidence

“Scala Data Centers is the leading sustainable data center platform in the Hyperscale market.”

Source: RevenueBase Database · checked Sep 19, 2026
19Strong evidenceEdmonton, AB, CanadaHQ checked Sep 19, 20261,001-5,000924 contacts →

Strong evidence

“About Silent-Aire Founded in 1994, Silent-Aire is technology driven company that designs, engineers, manufactures and services hyperscale data center solutions.”

Source: RevenueBase Database · checked Sep 19, 2026
20Strong evidenceFranklin, WI, United StatesHQ checked Sep 19, 20261,001-5,000923 contacts →

Strong evidence

“We provide high-end technical and professional services for the entire lifecycle of data centers.”

Source: RevenueBase Database · checked Sep 19, 2026
21Strong evidenceDallas, TX, United StatesHQ checked Sep 19, 2026501-1,000870 contacts →

Strong evidence

“CyrusOne is a leading global data center developer and operator, delivering sophisticated digital infrastructure solutions worldwide.”

Source: RevenueBase Database · checked Sep 19, 2026
22Indirect evidenceDallas, TX, United StatesHQ checked Sep 19, 2026501-1,000868 contacts →

Indirect evidence

“DataBank Holdings Ltd.”

Source: RevenueBase Database · checked Sep 19, 2026
23Indirect evidencePhoenix, AZ, United StatesHQ checked Sep 19, 2026201-500849 contacts →

Indirect evidence

“IO is now Iron Mountain.”

Source: RevenueBase Database · checked Sep 19, 2026
24Indirect evidenceCentennial, CO, United StatesHQ checked Sep 19, 2026501-1,000833 contacts →

Indirect evidence

“Flexential empowers the IT journey of the nation’s most complex businesses by offering tailored hybrid IT solutions delivered via the FlexAnywhere® platform of integrated…”

Source: RevenueBase Database · checked Sep 19, 2026
25Indirect evidenceNew York, United StatesHQ checked Sep 19, 2026501-1,000803 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 19, 2026

Showing 25 of 4,248 data center design and build firms worldwide

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Data center design and build firms worldwide at a glance

As of Sep 19, 2026
35.6%Verified-email coverage
34.9Average contacts per company
11-50Median size (employees)
1.9%Largest-city concentration · London
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
1,504
11-50
1,629
51-200
715
201-500
217
501-1,000
81
1,001-5,000
66
5,001-10,000
7
10001+
15

Email recency is reported on each country list linked below.

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 design and build 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.
Coverage
Every country. Country and city lists for data center design and build firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “data center design and build 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 data center design and build 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 data center design and build firms, and records with no verified work email.
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, 52,812 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 19, 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.

Data center design and build firms by location

28 lists · largest first

Every Data center design and build firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 design and build 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 data center design and build firms are there worldwide?

RevenueBase identified 4,248 data center design and build firms worldwide 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?

Vertiv, headquartered in Columbus, tops this list with the largest team on record.

Which country has the most data center design and build firms?

The United States leads with 1,060 companies, followed by the United Kingdom (260) and Brazil (182). Every data center design and build firms list by country and city is linked on this page.

Which city has the most data center design and build firms?

London leads with 79 headquartered companies, followed by Sao Paulo (59) and Singapore (43).

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 52,812 verified decision-maker contacts tracked across these 4,248 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 19, 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.