Company lists · Data refreshed September 2026

Top 25 Leed consulting firms based in the United States

Name: Leed consulting 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 28, 2026 1,706 companies tracked

RevenueBase identified 1,706 leed consulting firms headquartered in the United States as of September 2026 and tracks 32,327 professional contacts across them, including 14,163 with verified work emails. New York is the largest hub.

This list covers leed consulting 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 28, 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 28, 2026 86% judged on-target in blind review

1,706Companies

32,327Contacts tracked

14,163Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest leed consulting firms based in the United States

Ranked by team size

Top 25 of 1,706 leed consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to leed consulting 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	ECS Group Of Companies	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,210 contacts →
	Partial evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	IMEG	Indirect evidence	Rock Island, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,985 contacts →
	Indirect evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 28, 2026
3	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	n/a	1,145 contacts →
	Partial evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 28, 2026
4	Bge, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,112 contacts →
	Indirect evidence “Ranked No.” Source: RevenueBase Database · checked Sep 28, 2026
5	Simpson Gumpertz & Heger SGH	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 28, 2026	501-1,000	942 contacts →
	Indirect evidence “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Source: RevenueBase Database · checked Sep 28, 2026
6	Syska Hennessy Group	Indirect evidence	New York, United StatesHQ checked Sep 28, 2026	501-1,000	803 contacts →
	Indirect evidence “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Source: RevenueBase Database · checked Sep 28, 2026
7	EBI Consulting	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 28, 2026	501-1,000	535 contacts →
	Indirect evidence “For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…” Source: RevenueBase Database · checked Sep 28, 2026
8	Groundwater & Environmental Services, INC	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 28, 2026	201-500	447 contacts →
	Indirect evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 28, 2026
9	AEI Consultants	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 28, 2026	201-500	433 contacts →
	Partial evidence “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Source: RevenueBase Database · checked Sep 28, 2026
10	Glumac	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	386 contacts →
	Indirect evidence “Glumac, a Tetra Tech Company, is a global leader in building engineering, committed to delivering a low carbon future for all.” Source: RevenueBase Database · checked Sep 28, 2026
11	P2s	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 28, 2026	201-500	375 contacts →
	Indirect evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 28, 2026
12	Cosentini Associates	Indirect evidence	Nyc, NY, United StatesHQ checked Sep 28, 2026	201-500	306 contacts →
	Indirect evidence “Cosentini has a 70+ year history of engineering many of the world’s most iconic buildings.” Source: RevenueBase Database · checked Sep 28, 2026
13	Environmental Consulting & Technology, Inc. ECT	Partial evidence	Gainesville, FL, United StatesHQ checked Sep 28, 2026	201-500	305 contacts →
	Partial evidence “Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Source: RevenueBase Database · checked Sep 28, 2026
14	Ecology And Environment, INC	Indirect evidence	Lancaster, NY, United StatesHQ checked Sep 28, 2026	5,001-10,000	278 contacts →
	Indirect evidence “E&E is now WSP USA.” Source: RevenueBase Database · checked Sep 28, 2026
15	Jva, INC	Partial evidence	Boulder, CO, United StatesHQ checked Sep 28, 2026	51-200	258 contacts →
	Partial evidence “JVA, Incorporated is an employee-owned consulting engineering firm with offices in Boulder, Fort Collins, Winter Park, Glenwood Springs, and Denver, Colorado.” Source: RevenueBase Database · checked Sep 28, 2026
16	DBR	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	227 contacts →
	Indirect evidence “Founded in 1972, DBR has evolved into the premier MEP engineering firm in Texas, providing mechanical, electrical, and plumbing engineering services, as well as building…” Source: RevenueBase Database · checked Sep 28, 2026
17	PEG	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 28, 2026	201-500	214 contacts →
	Indirect evidence “PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.” Source: RevenueBase Database · checked Sep 28, 2026
18	ESD NOW Stantec Consulting Services	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	208 contacts →
	Indirect evidence “A global company, ESD is a leader in Improving Society Through the Built Environment.” Source: RevenueBase Database · checked Sep 28, 2026
19	ATANE	Partial evidence	NY, United StatesHQ checked Sep 28, 2026	201-500	194 contacts →
	Partial evidence “From humble beginnings in 1991 as a 2-person company in New York City, we have now grown into a 500-person strong consulting firm, with 15 regional offices in the US (and India).” Source: RevenueBase Database · checked Sep 28, 2026
20	SCI Engineering, INC	Partial evidence	St. Charles, MO, United StatesHQ checked Sep 28, 2026	51-200	174 contacts →
	Partial evidence “SCI Engineering, Inc.(SCI) is a nationwide, multi-discipline professional consulting engineering firm that provides comprehensive services across all phases of project development…” Source: RevenueBase Database · checked Sep 28, 2026
21	EEA Consulting Engineers	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	51-200	157 contacts →
	Partial evidence “EEA Consulting Engineers is a full-service mechanical, electrical and plumbing (MEP)consulting firm serving new and existing facilities in all market sectors.” Source: RevenueBase Database · checked Sep 28, 2026
22	HRP Associates, INC	Partial evidence	Farmington, CT, United StatesHQ checked Sep 28, 2026	51-200	155 contacts →
	Partial evidence “For 40 years, the consulting engineers at HRP have worked together with our clients to assure that they reach their intended business goals and achieve the right solutions to…” Source: RevenueBase Database · checked Sep 28, 2026
23	Grumman Butkus Associates	Partial evidence	Evanston, IL, United StatesHQ checked Sep 28, 2026	51-200	153 contacts →
	Partial evidence “Grumman\|Butkus Associates (GBA) is a nationally recognized consulting engineering firm that specializes in mechanical, electrical and plumbing design services and energy and…” Source: RevenueBase Database · checked Sep 28, 2026
24	Keramida INC	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 28, 2026	51-200	152 contacts →
	Partial evidence “Founded in 1988, KERAMIDA is a multidisciplinary Sustainability, EHS & Engineering consulting firm grounded in evidence-based research and development.” Source: RevenueBase Database · checked Sep 28, 2026
25	Dubois & King, INC	Partial evidence	Randolph, VT, United StatesHQ checked Sep 28, 2026	51-200	151 contacts →
	Partial evidence “Established in 1962, DuBois & King is a multidisciplined consulting engineering firm with extensive experience providing planning, permitting, and technical design services.” Source: RevenueBase Database · checked Sep 28, 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: leed consulting 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 leed consulting firms.
Partial evidence: Its own public description names part of leed consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name leed consulting 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 1,706 leed consulting firms based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 14,163 reachable decision-makers.

Free signup · no credit card

View the full list →

Leed consulting firms based in the United States at a glance

As of Sep 28, 2026

43.8%Verified-email coverage

18.9Average contacts per company

1-10Median size (employees)

4.0%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,016

11-50

521

51-200

134

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,706 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 leed consulting 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 “leed consulting 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 leed consulting 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 leed consulting 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, 14,163 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 28, 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.

Leed consulting 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 leed consulting 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 leed consulting firms are there based in the United States?

RevenueBase identified 1,706 leed consulting 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?

ECS Group Of Companies, headquartered in Chantilly, tops this list with the largest team on record.

Which city has the most leed consulting firms?

New York leads with 69 headquartered companies, followed by Houston (38) and Atlanta (35).

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 14,163 verified decision-maker contacts tracked across these 1,706 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,706 leed consulting firms based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Leed consulting firms by geography

Browse the directory

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.