Company lists · Data refreshed November 2026

Top 16 Change impact assessment services based in the United States

RevenueBase identified 28 company matches for change impact assessment services associated with the United States as of November 2026 and tracks 312 professional contacts across them, including 143 with verified work emails. Wilmington is the largest hub.

This list covers company matches for change impact assessment services 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 November 6, 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 Nov 6, 2026 How this list was built
28Companies
312Contacts tracked
143Verified emails
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The 16 largest change impact assessment services based in the United States

Ranked by team size
Top 16 of 28 company matches for change impact assessment services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAgoura Hills, AZ, United StatesHQ recorded Nov 6, 202651-20098 contacts →

Exact match

“Aspen Environmental Group is an expert interdisciplinary environmental impact analysis firm, specializing in the management of environmental assessment efforts under CEQA, NEPA…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchMenlo Park, CA, United StatesHQ recorded Nov 6, 202611-5046 contacts →

Exact match

“At Insignia, our mission is to provide a broad range of environmental consulting services with a focus on infrastructure clients and the communities they serve.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchBethesda, MD, United StatesHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“PlanEHS is a Washington D.C-based Environmental Impact Assessment Consulting Firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchCharlottesville, VA, United StatesHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Rho Impact quantifies the impact of companies, products, and technologies in order to empower investors and buyers to make sustainable decisions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchCulver City, CA, United StatesHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“TAHA has been providing public sector and private clients with environmental impact assessment services for more than 35 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBurnsville, NV, United StatesHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Summit Envirosolutions is a consulting firm providing comprehensive environmental services using state-of-the-art environmental management information systems to evaluate and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchVancouver, WA, United StatesHQ recorded Nov 6, 202651-2006 contacts →

Exact match

“Peak Sustainability Group joined Maul Foster & Alongi (MFA) in late 2024, expanding the breadth of services we provide to clients across the Pacific Northwest and beyond.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchMinneapolis, MN, United StatesHQ recorded Nov 6, 20261-106 contacts →

Exact match

“LEIF is a firm specializing in environmental impact assessments that help inform and communicate enterprise sustainability efforts.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSan Luis Obispo, CA, United StatesHQ recorded Nov 6, 20261-104 contacts →

Exact match

“AMBIENT Air Quality & Noise Consulting specializes in the preparation of air quality, greenhouse gas, noise, and groundborne vibration impact assessments in support of projects…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchDewey, AZ, United StatesHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Applied Cultural Ecology, LLC provides services in areas of heritage resource management for living cultural communities, social impact assessment, public involvement, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchGoleta, CA, United StatesHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Nataij Group is a boutique consulting firm with a mission to support communities on the frontlines of climate change by delivering results tailored to local priorities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchWilmington, DE, United StatesHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Project Solved provides organizational change management services that will help manage the impact new programs, processes, and other initiatives have on your organization.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchEl Segundo, CA, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Cheryl Frazier and Associates helps organizations stabilize workflows, align stakeholders, and prepare for successful system and process change before costly mistakes happen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMadison, WI, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Cirrus Change Readiness prepares organizations for successful technology adoption.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKansas City, MO, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“The Brookside Group helps change sponsors lead the changes associated with transformations, reorganizations, large-scale system implementations, and acquisition integrations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchWilmington, DE, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Boutique Environmental Impact Mitigation Service”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 16 of 28 change impact assessment services based in the United States

See the full list, filter by size, metro and specialty, and access 143 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Change impact assessment services based in the United States at a glance

As of Nov 6, 2026
45.8%Verified-email coverage
11.1Average contacts per company
1-10Median size (employees)
7.1%Largest-city concentration · Wilmington
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
20
11-50
5
51-200
2
1,001-5,000
1

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 28 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 “change impact assessment services” 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 143 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 November 6, 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.

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 “change impact assessment services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many change impact assessment services are there based in the United States?

RevenueBase identified 28 company matches for change impact assessment services associated with the United States as of November 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?

Aspen Environmental Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most change impact assessment services?

Wilmington leads with 2 company records, followed by Bethesda (1) and Boston (1).

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 143 professional contacts with verified work emails tracked across these 28 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 November 6, 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.