Company lists · Data refreshed September 2026

Top 24 Lean consulting firms based in Washington, United States

Name: Lean consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 58 companies tracked

RevenueBase identified 58 lean consulting firms headquartered in Washington, United States as of September 2026 and tracks 599 professional contacts across them, including 241 with verified work emails. Atlanta is the largest hub.

This list covers lean consulting firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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 HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

58Companies

599Contacts tracked

241Verified emails

Unlock all 58 companies Free signup · no credit card · 500 free credits

The 24 largest lean consulting firms based in Washington, United States

Ranked by team size

Top 24 of 58 lean consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names lean consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Herren AssociatesIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	143
	“Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Source: company website · checked Sep 4, 2026
2	Telesolv ConsultingIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	201-500	129
	“To become a demand business, an organization must constantly improve the value created by its core business processes.” Source: company website · checked Sep 4, 2026
3	Censeo Consulting GroupIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	85
	“Running an organization and executing plans is hard work.” Source: company website · checked Sep 4, 2026
4	Capital GroupPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	43
	“Capital Group is a management consulting firm with more than a decade of experience in providing effective and innovative consulting services to public and private sector clients.” Source: company website · checked Sep 4, 2026
5	Buckner Energy LLCIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	10
	“We help business owners and operators identify and implement the right technologies that enable operational excellence.” Source: company website · checked Sep 4, 2026
6	Captivate PerspectivesIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	8
	“Captivate Perspectives provides high quality talents and services to support organizations in achieving maximum and positive results.” Source: company website · checked Sep 4, 2026
7	Promesa Consulting Group, INCPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	7
	“Promesa is a global consulting firm that helps businesses streamline their processes and better manage their companies.” Source: company website · checked Sep 4, 2026
8	O2 Consulting GroupPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	6
	“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: company website · checked Sep 4, 2026
9	Stockbridge ConsultingIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	5
	“ABOUT US Taking your organization from promise to results begins with our investment in proven delivery methods and tools.” Source: company website · checked Sep 4, 2026
10	Andrew Morgan Consulting, LLCPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	5
	“Andrew Morgan Consulting (AMC) is a Service-Disabled, Veteran-Owned Small Business (SDVOSB) and HUBZone SB that delivers insightful management consulting services enabled by best…” Source: company website · checked Sep 4, 2026
11	MangotreeIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	5
	“MangoTree is an agency at the cross-section of design & development.” Source: company website · checked Sep 4, 2026
12	Concordia Consulting LLCIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	4
	“Karen leverages her expertise in business processes and strategic planning to help C-Suite leaders communicate more effectively, develop synergy, and attain desired results.” Source: company website · checked Sep 4, 2026
13	AinsworthlloydPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	4
	“AinsworthLloyd is an operations and technology consulting firm that specializes in the science of how work gets done.” Source: company website · checked Sep 4, 2026
14	The Lever GroupIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	4
	“The Lever Group provides leading management solutions for Federal Agencies and Fortune 100 firms.” Source: company website · checked Sep 4, 2026
15	Solvo Consulting ServicesPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	3
	“At Solvo Consulting Services, we tailor large-scale Fortune 500 solutions to fit your business needs!” Source: company website · checked Sep 4, 2026
16	Your Solution ArchitectIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	2
	“Helping build better companies by architecting better foundations thru defining structural processes and implementing the correct tools to make it happen.” Source: company website · checked Sep 4, 2026
17	Asaph AdvisorsIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	2
	“As a services organization, your people are the critical factor to successfully executing your organization’s vision.” Source: company website · checked Sep 4, 2026
18	Consult DSAPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	1
	“Consult DSA is a management consulting firm that brings energy and insight to identify and solve organizational challenges using simple and practical tools.” Source: company website · checked Sep 4, 2026
19	Thriive ConsultingIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	1
	“Helping businesses become stronger and healthier from end-to-end.” Source: company website · checked Sep 4, 2026
20	Primehook Technology LLCIndirect evidence	Washington, United StatesHQ checked Sep 4, 2026	1-10	1
	“Strategy + Emerging Technology & Analytics + Program Management => Results What We Do - Helping senior executives and general managers grow profits through innovation and…” Source: company website · checked Sep 4, 2026
21	CNB ConsultingPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	1
	“CNB Consulting helps organizations turn data into clarity, strategy, and measurable growth.” Source: company website · checked Sep 4, 2026
22	Efusion ConsultingIndirect evidence	Washington, United StatesHQ checked Sep 4, 2026	1-10	1
	Source: company website · checked Sep 4, 2026
23	Margaret & COPartial evidence	Washington, United StatesHQ checked Sep 4, 2026	1-10	1
	“At Margaret & Co, we specialize in delivering transformative consulting services that empower businesses to thrive.” Source: company website · checked Sep 4, 2026
24	Guideline ConsultantsIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1-10	1
	“We specialize in organizational effectiveness and create curated business experiences to help your business grow.” Source: company website · checked Sep 4, 2026

Showing 24 of 58 lean consulting firms based in Washington, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 241 reachable decision-makers.

Free signup · no credit card

See all 58 companies

Lean consulting firms based in Washington, United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

AtlantaLargest hub · 133 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 58 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 lean consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “lean consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among lean consulting firms, 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 an evidence 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, 241 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 4, 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.

Lean consulting firms by metro in the United States

Frequently asked

How many lean consulting firms are there based in Washington, United States?

RevenueBase identified 58 lean consulting firms 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 has the most lean consulting firms?

Atlanta leads with 133 headquartered companies, followed by New York (114) and Houston (113).

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 241 verified decision-maker contacts tracked across these 58 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 4, 2026.

Ready to reach these companies? Verified emails and direct dials for all 58 lean consulting firms based in Washington, United States. Start with a free account, no credit card.

Get the full list

Related lists

Lean consulting firms by geography

Browse the directory

Browse: Companies home · Lean consulting firms in United States · All United States lists · All Lean consulting firms lists · New lists

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.