Company lists · Data verified August 2026

Top 25 Carbon management consultants based in the United States

Name: Carbon management consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 3,065 companies tracked

There are 3,065 carbon management consultants headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 71,709 professional contacts across them, including 34,623 with verified work emails and 29,518 with mobile numbers. New York is the largest hub.

This list covers carbon management consultants headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

3,065Companies

71,709Contacts tracked

34,623Verified emails

29,518Mobile numbers

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The 25 largest carbon management consultants based in the United States

Ranked by team size

Top 25 of 3,065 carbon management consultants based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	WSP In The U.S	New York, NY	10001+	9,318	5,535
2	APTIM	Wichita, KS	1,001-5,000	2,644	1,098
3	Mckinstry	Scottsdale, AZ	1,001-5,000	2,198	1,583
4	Baringa	New York, NY	1,001-5,000	2,198	1,548
5	Ricardo	California, MD	1,001-5,000	2,111	955
6	Swca Environmental Consultants	Phoenix, AZ	1,001-5,000	1,618	1,159
7	Montrose Environmental Group	Little Rock, AR	1,001-5,000	1,516	846
8	Ameresco	Framingham, MA	1,001-5,000	1,475	1,125
9	SCS Engineers	Long Beach, CA	1,001-5,000	1,191	675
10	Verdantas	Toledo, OH	1,001-5,000	1,127	795
11	California Resources Corporation	Los Angeles, CA	1,001-5,000	1,087	794
12	Trinity Consultants	Dallas, TX	1,001-5,000	949	615
13	Alliance Technical Group	Pittsburgh, PA	1,001-5,000	946	549
14	Franklin Energy	Port Washington, WI	1,001-5,000	851	484
15	Energy Solutions	Orange, CA	201-500	768	419
16	Resource Innovations	Chandler, AZ	501-1,000	724	558
17	Inerco	Delaware	1,001-5,000	682	90
18	Antea Group USA	White Plains, NY	1,001-5,000	658	6
19	Watershed	San Francisco, CA	201-500	537	96
20	EBI Consulting	Springfield Township, PA	501-1,000	530	351
21	Rincon Consultants	San Diego, CA	501-1,000	483	312
22	Groundwater & Environmental Services, INC	Amherst, NY	201-500	452	229
23	ROUX	Houston, TX	201-500	435	311
24	TRIO	Mclean, VA	201-500	382	245
25	P2s	Irvine, CA	201-500	370	208

Showing 25 of 3,065 carbon management consultants based in the United States

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Carbon management consultants based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 148 HQs

29,518Contacts with mobile numbers

175Emails re-verified in last 30 days

Companies by employee count

1-10

2,033

11-50

754

51-200

182

201-500

501-1,000

1,001-5,000

10001+

Carbon management consultants by metro

Metro	Companies
Carbon management consultants in New York	148
Carbon management consultants in Houston	95
Carbon management consultants in Washington	70
Carbon management consultants in Chicago	65
Carbon management consultants in San Francisco	58
Carbon management consultants in Seattle	56
Carbon management consultants in Los Angeles	56

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “carbon management consultants”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 175 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many carbon management consultants are there based in the United States?

There are 3,065 carbon management consultants headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

WSP In The U.S, headquartered in New York, tops this list with the largest team on record.

Which city has the most carbon management consultants?

New York leads with 148 headquartered companies, followed by Houston (95) and Washington (70).

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 34,623 verified decision-maker contacts tracked across these 3,065 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.