Company lists · Data refreshed October 2026

Top 25 Building systems engineering companies based in the United States

Name: Building systems engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 2,681 companies tracked

RevenueBase identified 2,681 company matches for building systems engineering companies associated with the United States as of October 2026 and tracks 103,284 professional contacts across them, including 45,325 with verified work emails. New York is the largest hub.

This list covers company matches for building systems engineering companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 9, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Oct 9, 2026 How this list was built

2,681Companies

103,284Contacts tracked

45,325Verified emails

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The 25 largest building systems engineering companies based in the United States

Ranked by team size

Top 25 of 2,681 company matches for building systems engineering companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Southland Industries	Exact match	Garden Grove, CA, United StatesHQ recorded Oct 9, 2026	10001+	3,010 contacts →
	Exact match “As one of the nation's largest building systems experts, Southland Industries provides innovative, practical results for your engineering, construction, service, and energy needs.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2	Power Design	Exact match	St. Petersburg, FL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	2,536 contacts →
	Exact match “Power Design is a National Design Build Contractor, focused on innovative construction across multiple trades: electrical, mechanical, plumbing, and systems technologies.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	The Haskell Company	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	2,390 contacts →
	Exact match “Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,778 contacts →
	Exact match “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	Emcor Group, INC	Exact match	Norwalk, CT, United StatesHQ recorded Oct 9, 2026	10001+	1,443 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6	Macdonald-Miller Facility Solutions	Exact match	Seatac, WA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,365 contacts →
	Exact match “MacDonald-Miller Facility Solutions is a full-service, design-build mechanical contractor in the Pacific Northwest.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Oct 9, 2026	10001+	1,354 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	Henderson Engineers	Exact match	Lenexa, KS, United StatesHQ recorded Oct 9, 2026	501-1,000	1,096 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,088 contacts →
	Exact match “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	Affiliated Engineers, INC	Exact match	Madison, WI, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,059 contacts →
	Exact match “Affiliated Engineers, Inc.(AEI) provides engineering leadership and whole-mission solutions for complex building, energy, and utility projects.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	Cmta, INC	Exact match	Louisville, KY, United StatesHQ recorded Oct 9, 2026	501-1,000	1,016 contacts →
	Exact match “CMTA is part of Legence, a Nasdaq Listed company.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	ARI	Exact match	East Peoria, IL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	986 contacts →
	Exact match “ARi is a global engineering firm headquartered in East Peoria, Illinois, USA offering services for: Embedded Software, Product Engineering, Manufacturing Engineering and Testing &…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Stellar	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 9, 2026	501-1,000	922 contacts →
	Exact match “Stellar, headquartered in Jacksonville, Florida, is a fully integrated firm focusing on design, engineering, construction, refrigeration, and mechanical and electrical services…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	Teledyne Brown Engineering	Exact match	Huntsville, United StatesHQ recorded Oct 9, 2026	1,001-5,000	863 contacts →
	Exact match “Teledyne Brown Engineering is a leader in providing innovative systems engineering, integration, operations and advanced manufacturing solutions for defense, space, marine and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Oct 9, 2026	501-1,000	835 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 9, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Introba	Exact match	St. Louis, MO, United StatesHQ recorded Oct 9, 2026	1,001-5,000	816 contacts →
	Exact match “Introba is one of the world’s largest building engineering and consulting firms with more than employees in offices across the United States, Canada, the United Kingdom, Serbia…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	Limbach	Exact match	Tampa, FL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	776 contacts →
	Exact match “Limbach is a leading building solutions firm delivering mission critical infrastructure that supports life’s most important moments.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	DLB Associates	Exact match	Neptune, NJ, United StatesHQ recorded Oct 9, 2026	501-1,000	729 contacts →
	Exact match “DLB Associates, founded in 1980, is an MEP and technology consulting firm specializing in data centers and mission-critical facilities.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	Prime Electric	Exact match	Bellevue, WA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	710 contacts →
	Exact match “For over a quarter century, Prime has been successfully engineering, constructing building, and facilities solutions for our clientele.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	ME Engineers	Exact match	Golden, CO, United StatesHQ recorded Oct 9, 2026	201-500	709 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	E Tech Group	Exact match	West Chester, OH, United StatesHQ recorded Oct 9, 2026	501-1,000	701 contacts →
	Exact match “E Tech Group is one of the largest engineering and system integration firms in the United States.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Ghafari Associates	Exact match	Dearborn, MI, United StatesHQ recorded Oct 9, 2026	501-1,000	690 contacts →
	Exact match “An innovator since 1982, Ghafari embraces an integrated design approach to deliver solutions that synergize building operations, systems, and people.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	Wunderlich-Malec Engineering, INC	Exact match	Eden Prairie, MN, United StatesHQ recorded Oct 9, 2026	501-1,000	664 contacts →
	Exact match “Wunderlich-Malec Engineering is a nationally recognized, 100% employee-owned leader in advanced engineering and control system solutions.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	F.E. Moran Group Of Companies	Exact match	Northbrook, IL, United StatesHQ recorded Oct 9, 2026	1,001-5,000	592 contacts →
	Exact match “At F.E.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “building systems engineering companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 2,681 building systems engineering companies based in the United States

See the full list, filter by size, metro and specialty, and access 45,325 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Building systems engineering companies based in the United States at a glance

As of Oct 9, 2026

43.9%Verified-email coverage

38.5Average contacts per company

11-50Median size (employees)

2.5%Largest-city concentration · New York

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

995

11-50

1,026

51-200

458

201-500

125

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 2,681 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “building systems engineering companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 45,325 professional contacts with verified work emails across the full matched dataset. 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 October 9, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Building systems engineering companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “building systems engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many building systems engineering companies are there based in the United States?

RevenueBase identified 2,681 company matches for building systems engineering companies associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Southland Industries tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most building systems engineering companies?

New York leads with 68 company records, followed by Houston (46) and San Diego (32).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 45,325 professional contacts with verified work emails tracked across these 2,681 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 9, 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 SmartSearch, 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.