Company lists · Data refreshed September 2026

Top 25 UK change management consultants based in Washington, United States

Name: UK change management consultants based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 170 companies tracked

RevenueBase identified 170 UK change management consultants headquartered in Washington, United States as of September 2026 and tracks 973 professional contacts across them, including 315 with verified work emails. Across the United States, New York is the largest hub for this category (359 companies); Washington has 170.

This list covers UK change management consultants headquartered in Washington, 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 29, 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 29, 2026 86% judged on-target in blind review

170Companies

973Contacts tracked

315Verified emails

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The 25 largest UK change management consultants based in Washington, United States

Ranked by team size

Top 25 of 170 UK change management consultants based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to UK change management consultants: 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	Herren Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	142 contacts →
	Indirect evidence “Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Source: RevenueBase Database · checked Sep 29, 2026
2	Telesolv Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	201-500	132 contacts →
	Indirect evidence “To become a demand business, an organization must constantly improve the value created by its core business processes.” Source: RevenueBase Database · checked Sep 29, 2026
3	Longevity Consulting	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	71 contacts →
	Partial evidence “Longevity Consulting is a customer-focused strategic management and IT consulting firm that helps federal agencies achieve mission objectives, improve outcomes, and strengthen…” Source: RevenueBase Database · checked Sep 29, 2026
4	Atlas Research	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	201-500	30 contacts →
	Indirect evidence “Atlas Research partners with clients to plan and execute enterprise-level transformation and performance improvement initiatives.” Source: RevenueBase Database · checked Sep 29, 2026
5	KGO	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	28 contacts →
	Indirect evidence “We are your project people.” Source: RevenueBase Database · checked Sep 29, 2026
6	Falcon Capital Advisors	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	26 contacts →
	Indirect evidence “Falcon Capital Advisors is a Washington, D.C.” Source: RevenueBase Database · checked Sep 29, 2026
7	Bellamy Management Services	Indirect evidence	Washington, United StatesHQ checked Sep 29, 2026	51-200	23 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
8	532 Group LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	22 contacts →
	Indirect evidence “532 Group LLC (“532 Group”) is a innovation, operations and technology consulting firm providing services to government, health, and financial sector clients.” Source: RevenueBase Database · checked Sep 29, 2026
9	CSR Communications	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	18 contacts →
	Partial evidence “We're the leading experts changing the way organizations manage change.” Source: RevenueBase Database · checked Sep 29, 2026
10	SZH Consulting	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	18 contacts →
	Partial evidence “SZH Consulting LLC is a boutique management consulting and coaching firm, specializing in the science and art of organizational effectiveness and executive coaching.” Source: RevenueBase Database · checked Sep 29, 2026
11	Jlan Solutions	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	16 contacts →
	Partial evidence “The Ideal Partner for a Successful Mission To meet the ever-changing demands of a dynamic environment, JLAN Solutions has the necessary breadth and depth of experience.” Source: RevenueBase Database · checked Sep 29, 2026
12	Bernuth & Williamson	Strong evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “Bernuth & Williamson provides consulting services in the areas of strategy, change management, and organizational development to leading nonprofits, foundations, associations, and…” Source: RevenueBase Database · checked Sep 29, 2026
13	Clarke Consulting	Indirect evidence	Washington, United StatesHQ checked Sep 29, 2026	1-10	11 contacts →
	Indirect evidence “Clarke Consulting focuses on helping organizations achieve higher performance and effectiveness through developing constructive organizational cultures, effective leadership and…” Source: RevenueBase Database · checked Sep 29, 2026
14	The Quality Coach	Indirect evidence	Washington, MO, United StatesHQ checked Sep 29, 2026	11-50	10 contacts →
	Indirect evidence “The Quality Coach is a full-service educational, coaching, and consulting group dedicated to helping others improve quality, customer retention, productivity, and profits by…” Source: RevenueBase Database · checked Sep 29, 2026
15	Thelan	Strong evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	9 contacts →
	Strong evidence “Thelan is a professional services firm whose project management consultancy practice – with core competencies in Strategy, Planning, and Implementation – is at the center of its…” Source: RevenueBase Database · checked Sep 29, 2026
16	Co-Creation Partners	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	8 contacts →
	Indirect evidence “OUR PROMISE We enable organizations to sustainably improve business performance.” Source: RevenueBase Database · checked Sep 29, 2026
17	Captivate Perspectives	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	8 contacts →
	Indirect evidence “Captivate Perspectives provides high quality talents and services to support organizations in achieving maximum and positive results.” Source: RevenueBase Database · checked Sep 29, 2026
18	Promesa Consulting Group, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	7 contacts →
	Indirect evidence “Promesa is a global consulting firm that helps businesses streamline their processes and better manage their companies.” Source: RevenueBase Database · checked Sep 29, 2026
19	Bryant Technologies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “Bryant Technologies, Inc.(BTI) is a collaboration of highly skilled and motivated professionals.” Source: RevenueBase Database · checked Sep 29, 2026
20	LEX Consulting Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “Founded in 2015, Lex Consulting is headquartered in Washington D.C.” Source: RevenueBase Database · checked Sep 29, 2026
21	Quodammodo Solutions LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	6 contacts →
	Partial evidence “QS Consulting leverages decades of Project Management and Advisory Services experience in the areas of Human Capital Management and Business Continuity.” Source: RevenueBase Database · checked Sep 29, 2026
22	O2 Consulting Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	6 contacts →
	Indirect evidence “For more than 40 years the O2 Consulting Group leadership worked side by side of brilliant CEOs – CEOs with incredible creativity, passion and the desire to accomplish the…” Source: RevenueBase Database · checked Sep 29, 2026
23	Cambio Consulting Group LLC	Partial evidence	Washington, United StatesHQ checked Sep 29, 2026	11-50	6 contacts →
	Partial evidence “Vanguard is a management consulting firm that specializes in strategic execution.” Source: RevenueBase Database · checked Sep 29, 2026
24	Stockbridge Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	5 contacts →
	Indirect evidence “ABOUT US Taking your organization from promise to results begins with our investment in proven delivery methods and tools.” Source: RevenueBase Database · checked Sep 29, 2026
25	VAN Allen Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	5 contacts →
	Partial evidence “Van Allen provides strategic consulting and management services with a particular focus on complex and multi-stakeholder IT projects.” Source: RevenueBase Database · checked Sep 29, 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: UK change management consultants. 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 UK change management consultants.
Partial evidence: Its own public description names part of UK change management consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name UK change management consultants. 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 170 UK change management consultants based in Washington, United States

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UK change management consultants based in Washington, United States at a glance

As of Sep 29, 2026

32.4%Verified-email coverage

5.7Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

124

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 170 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 UK change management consultants, 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 Washington, United States whose own description of what they do matches “UK change management consultants”. 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 UK change management consultants), 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 UK change management consultants, and records with no verified work email. Companies headquartered outside Washington 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, 315 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 29, 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.

UK change management consultants by metro in the United States

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 UK change management consultants, 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 UK change management consultants are there based in Washington, United States?

RevenueBase identified 170 UK change management consultants headquartered in Washington, 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?

Herren Associates, headquartered in Washington, tops this list with the largest team on record.

Which city in the United States has the most UK change management consultants?

New York leads the United States with 359 headquartered companies, followed by Atlanta (226) and Chicago (225). Washington has 170.

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 315 verified decision-maker contacts tracked across these 170 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 29, 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.