Company lists · Data refreshed September 2026

Top 25 Building systems engineering firms based in New York, United States

Name: Building systems engineering firms based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 91 companies tracked

RevenueBase identified 91 building systems engineering firms headquartered in New York, United States as of September 2026 and tracks 3,090 professional contacts across them, including 1,685 with verified work emails. New York is the largest hub.

This list covers building systems engineering firms headquartered in New York, 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

91Companies

3,090Contacts tracked

1,685Verified emails

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The 25 largest building systems engineering firms based in New York, United States

Ranked by team size

Top 25 of 91 building systems engineering firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to building systems 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	Syska Hennessy Group	Indirect evidence	New York, United StatesHQ checked Sep 16, 2026	501-1,000	803 contacts →
	Indirect evidence “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Source: RevenueBase Database · checked Sep 16, 2026
2	Jaros, Baum & Bolles Jb&b	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	201-500	465 contacts →
	Strong evidence “Jaros, Baum & Bolles, Inc.(JB & B) is a leading consulting engineering firm specializing in mechanical, electrical, plumbing, and fire protection (MEP/FP) systems for complex…” Source: RevenueBase Database · checked Sep 16, 2026
3	Robert Derector Associates	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	186 contacts →
	Partial evidence “Robert Derector Associates is a full service engineering firm with a local feel and a global reach.” Source: RevenueBase Database · checked Sep 16, 2026
4	Gilsanz Murray Steficek	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	122 contacts →
	Strong evidence “Gilsanz Murray Steficek is a structural engineering and building envelope consulting firm committed to creating solutions.” Source: RevenueBase Database · checked Sep 16, 2026
5	Goldman Copeland Associates, Engineers DPC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	81 contacts →
	Partial evidence “Goldman Copeland (GOCO) has provided superior MEP/FP and Energy consulting engineering services since 1968.” Source: RevenueBase Database · checked Sep 16, 2026
6	EME Consulting Engineering And Architecture Group, LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	75 contacts →
	Partial evidence “EME Consulting Engineering and Architecture Group, LLC (EME Group) is an award-winning professional engineering firm licensed and insured to provide professional engineering…” Source: RevenueBase Database · checked Sep 16, 2026
7	Kohler Ronan	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	67 contacts →
	Partial evidence “Kohler Ronan Consulting Engineers offers professional engineering and design services across the following major disciplines: Mechanical, Electrical, Plumbing, Fire Protection…” Source: RevenueBase Database · checked Sep 16, 2026
8	Ettinger Engineering Associates	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	53 contacts →
	Strong evidence “Ettinger Engineering Associates is a full service consulting engineering firm providing mechanical, electrical & plumbing/fire protection (MEP/FP) building design as well as…” Source: RevenueBase Database · checked Sep 16, 2026
9	Gace Consulting Engineers DPC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	43 contacts →
	Partial evidence “GACE Consulting Engineers DPC is an award-winning structural engineering firm founded in 1979, and led by an experienced team of Principals.” Source: RevenueBase Database · checked Sep 16, 2026
10	Enica Engineering	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	37 contacts →
	Partial evidence “Enica Engineering is an engineering firm whose services and value revolve around our industry leading controls expertise and our unique hands on project delivery approach.” Source: RevenueBase Database · checked Sep 16, 2026
11	Dagher Engineering, Pllc	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	37 contacts →
	Strong evidence “Dagher Engineering is an award-winning building systems engineering and sustainability consulting firm based in New York City.” Source: RevenueBase Database · checked Sep 16, 2026
12	The Fulcrum Group	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	35 contacts →
	Partial evidence “The Fulcrum Group is a trusted partner to owner-operators of mission-critical facilities and building energy infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
13	GEA Consulting Engineers	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	34 contacts →
	Partial evidence “GEA Consulting Engineers is one of New York’s top engineering firms, specializing in the innovative design of mechanical, electrical, plumbing, fire protection, commissioning…” Source: RevenueBase Database · checked Sep 16, 2026
14	Skyline Engineering	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	33 contacts →
	Partial evidence “Skyline is a unique, full service Professional Engineering firm comprised of four divisions serving New York City and beyond.” Source: RevenueBase Database · checked Sep 16, 2026
15	ADS Engineers	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	32 contacts →
	Partial evidence “ads ENGINEERS, DPC, established in 1979 continues to provide high-quality engineering services to our long-standing clients based on the principals established by the founding…” Source: RevenueBase Database · checked Sep 16, 2026
16	RS Engineering	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	27 contacts →
	Partial evidence “Building Design.” Source: RevenueBase Database · checked Sep 16, 2026
17	Control Solutions Group, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	26 contacts →
	Partial evidence “Founded in 1998, Control Solutions Group, Inc.(CSG) partners leading-edge technology with a customized approach to facilitate and improve building management in its target markets.” Source: RevenueBase Database · checked Sep 16, 2026
18	Legacy Engineers, D.P.C	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	25 contacts →
	Partial evidence “Legacy Engineers is a new mechanical & electrical consulting engineering and construction services firm, striving to be a national, best-in-class, MBE firm specializing in…” Source: RevenueBase Database · checked Sep 16, 2026
19	A.G. Consulting Engineering, PC	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	25 contacts →
	Indirect evidence “A.G.” Source: RevenueBase Database · checked Sep 16, 2026
20	Ventrop Engineering Consulting Group, Pllc	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	23 contacts →
	Strong evidence “In the spirit of excellent service, Ventrop ECG offers outstanding professional engineering services to building owners and developers by building on decades of experience in the…” Source: RevenueBase Database · checked Sep 16, 2026
21	Alan Margolin & Associates	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	22 contacts →
	Partial evidence “AMAA is a multi-disciplinary firm focused on consulting engineering headquartered in Manhattan, servicing the Eastern United States.” Source: RevenueBase Database · checked Sep 16, 2026
22	Ysrael A. Seinuk, P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “Ysrael A.” Source: RevenueBase Database · checked Sep 16, 2026
23	Argo Critical Solutions LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	21 contacts →
	Partial evidence “Argo Critical Solutions is an engineering firm that focuses on mission critical consulting services.” Source: RevenueBase Database · checked Sep 16, 2026
24	Fiskaa, LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “Founded in 1997 by Thomas Fiskaa, Steve Papadakis, and Eric Martinsen, Fiskaa Engineering continues to deliver high-quality engineering and consulting services nation-wide.” Source: RevenueBase Database · checked Sep 16, 2026
25	Wexler Associates	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “Wexler Associates is a consulting structural engineering firm located in midtown Manhattan.” Source: RevenueBase Database · checked Sep 16, 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: building systems 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 building systems engineering firms.
Partial evidence: Its own public description names part of building systems engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building systems 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 91 building systems engineering firms based in New York, United States

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Building systems engineering firms based in New York, United States at a glance

As of Sep 16, 2026

54.5%Verified-email coverage

34.0Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 91 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 building systems 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 New York, United States whose own description of what they do matches “building systems 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 building systems 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 building systems engineering firms, and records with no verified work email. Companies headquartered outside New York 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, 1,685 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.

Building systems engineering firms by metro in the United States

Building systems engineering firms in New York91
Building systems engineering firms in Houston62
Building systems engineering firms in Austin41
Building systems engineering firms in San Diego38
Building systems engineering firms in Dallas33
Building systems engineering firms in Chicago32
Building systems engineering firms in San Antonio27
Building systems engineering firms in Tampa27
Building systems engineering firms in Portland26

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 building systems 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 building systems engineering firms are there based in New York, United States?

RevenueBase identified 91 building systems engineering firms headquartered in New York, 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?

Syska Hennessy Group, headquartered in New York, tops this list with the largest team on record.

Which city has the most building systems engineering firms?

New York leads with 91 headquartered companies, followed by Houston (62) and Austin (41).

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 1,685 verified decision-maker contacts tracked across these 91 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.