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Company lists · Data verified August 2026

Top 25 Climate resilience consulting firms based in the United States

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,962 companies tracked

There are 1,962 climate resilience consulting firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 75,858 professional contacts across them, including 39,237 with verified work emails and 30,359 with mobile numbers. New York is the largest hub.

This list covers climate resilience 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. Data current as of August 28, 2026.

1,962Companies
75,858Contacts tracked
39,237Verified emails
30,359Mobile numbers
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The 25 largest climate resilience consulting firms based in the United States

Ranked by team size
Top 25 of 1,962 climate resilience consulting firms 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.
#CompanyHQEmployeesContactsVerified emails
1Tetra TechPasadena, CA10001+13,0665,477
2WSP In The U.SNew York, NY10001+9,3185,535
3APTIMWichita, KS1,001-5,0002,6441,098
4Geosyntec ConsultantsBoca Raton, FL1,001-5,0002,3921,594
5BaringaNew York, NY1,001-5,0002,1981,548
6RicardoCalifornia, MD1,001-5,0002,111955
7Hazen And SawyerRaleigh, NC1,001-5,0002,1051,457
8Jensen HughesGreenville, SC1,001-5,0001,6421,211
9Swca Environmental ConsultantsPhoenix, AZ1,001-5,0001,6181,159
10PennoniHaddon Heights, NJ1,001-5,0001,255851
11ArdurraFlagstaff, AZ1,001-5,0001,248892
12IEMBaton Rouge, LA501-1,0001,173623
13Apex CompaniesRockville, MD1,001-5,0001,146591
14Haley & AldrichBurlington, MA501-1,0001,128789
15VerdantasToledo, OH1,001-5,0001,127795
16Braun Intertec CorporationAmarillo, TX1,001-5,0001,054691
17Trinity ConsultantsDallas, TX1,001-5,000949615
18PsomasSanta Ana, CA501-1,000741417
19Environmental Science AssociatesPetaluma, CA501-1,000725517
20Tighe & BondPortland, ME501-1,000638394
21MSA Professional ServicesBaraboo, WI501-1,000598348
22Rincon ConsultantsSan Diego, CA501-1,000483312
23Anchor QEAColumbia, MD501-1,000478329
24MBP Mcdonough Bolyard PeckCharleston, SC201-500472243
25Hagerty ConsultingTallahassee, FL201-500469293

Showing 25 of 1,962 climate resilience consulting firms based in the United States

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Climate resilience consulting firms based in the United States at a glance

As of Aug 28, 2026
1-10Median size (employees)
New YorkLargest hub · 94 HQs
30,359Contacts with mobile numbers
201Emails re-verified in last 30 days

Companies by employee count

1-10
1,365
11-50
414
51-200
116
201-500
23
501-1,000
13
1,001-5,000
20
10001+
3

Climate resilience consulting firms by metro

MetroCompanies
Climate resilience consulting firms in New York94
Climate resilience consulting firms in Washington75
Climate resilience consulting firms in Houston47
Climate resilience consulting firms in San Francisco38
Climate resilience consulting firms in Portland37
Climate resilience consulting firms in Seattle37
Climate resilience consulting firms in Denver34

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 “climate resilience consulting firms”, 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; 201 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 climate resilience consulting firms are there based in the United States?

There are 1,962 climate resilience consulting firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Tetra Tech, headquartered in Pasadena, tops this list with the largest team on record.

Which city has the most climate resilience consulting firms?

New York leads with 94 headquartered companies, followed by Washington (75) and Houston (47).

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 39,237 verified decision-maker contacts tracked across these 1,962 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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Related lists

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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.

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