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Company lists · Data refreshed September 2026

Top 25 Lean management consulting companies based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 1,974 companies tracked

RevenueBase identified 1,974 lean management consulting companies headquartered in the United States as of September 2026 and tracks 10,153 professional contacts across them, including 3,087 with verified work emails and 4,353 with mobile numbers. Atlanta is the largest hub.

This list covers lean management consulting companies headquartered in the 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
1,974Companies
10,153Contacts tracked
3,087Verified emails
4,353Mobile numbers
Unlock all 1,974 companies Free signup · no credit card · 500 free credits

The 25 largest lean management consulting companies based in the United States

Ranked by team size
Top 25 of 1,974 lean management consulting companies based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names lean management consulting companies: 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.
#CompanyHeadquartersEmployeesContacts
1
SEIStrong evidence
Cincinnati, PA, United StatesHQ checked Sep 4, 2026501-1,000611

“SEI is a management consulting firm delivering fresh perspectives and reliable results.”

Source: company website · checked Sep 4, 2026
2
SkenderIndirect evidence
Chicago, IN, United StatesHQ checked Sep 4, 2026201-500272

“The premier construction experience.”

Source: company website · checked Sep 4, 2026
3
Thought Logic ConsultingIndirect evidence
Atlanta, VA, United StatesHQ checked Sep 4, 2026201-500217

“Thought logic is a functionally-led, digitally enabled consultancy.”

Source: company website · checked Sep 4, 2026
4
CompulinkIndirect evidence
St. Petersburg, FL, United StatesHQ checked Sep 4, 2026201-500189

“Compulink is a performance based company that is focused on continuous improvement in our practices and procedures as well as the quality of service to our customers.”

Source: company website · checked Sep 4, 2026
5
Herren AssociatesIndirect evidence
Washington, DC, United StatesHQ checked Sep 4, 202651-200143

“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
6
TrissentialIndirect evidence
Minneapolis, MN, United StatesHQ checked Sep 4, 2026201-500135

“Trissential, an Expleo Company, blends local trust with global reach, supported by experts across 29 countries.”

Source: company website · checked Sep 4, 2026
7
The LAB ConsultingStrong evidence
Houston, TX, United StatesHQ checked Sep 4, 202651-20095

“The Lab is a management consulting firm that helps executive project sponsors realize sustainable and transformative process and financial benefits for their businesses by…”

Source: company website · checked Sep 4, 2026
8
Censeo Consulting GroupIndirect evidence
Washington, DC, United StatesHQ checked Sep 4, 202651-20085

“Running an organization and executing plans is hard work.”

Source: company website · checked Sep 4, 2026
9
Cornerstone Consulting OrganizationPartial evidence
Toledo, OH, United StatesHQ checked Sep 4, 2026201-50081

“Cornerstone Consulting Organization (CCO) provides enterprise strategy and operations and manufacturing systems solutions.”

Source: company website · checked Sep 4, 2026
10
Iet, Inc. Industrial Engineering & ConsultingPartial evidence
Toledo, OH, United StatesHQ checked Sep 4, 202651-20080

“IET is a full-service industrial and manufacturing engineering service and consulting firm established in 1989.”

Source: company website · checked Sep 4, 2026
11
The Northridge GroupIndirect evidence
Rosemont, IL, United StatesHQ checked Sep 4, 202651-20077

“At The, we partner with organizations to improve performance, accelerate execution, and transform strategy into measurable results.”

Source: company website · checked Sep 4, 2026
12
Next Level Partners , LLCPartial evidence
Naples, FL, United StatesHQ checked Sep 4, 202651-20074

“NEXT LEVEL Partners® is much more than a consulting firm, we’re your partner in creating self-sustaining capability through Business Enterprise Transformation, Knowledge…”

Source: company website · checked Sep 4, 2026
13
Management SolutionsStrong evidence
Knoxville, TN, United StatesHQ checked Sep 4, 202651-20065

“Management Solutions is a national award-winning performance management and consulting services firm that specializes in improving organizational performance through proven…”

Source: company website · checked Sep 4, 2026
14
FTE Factory AdvisorsIndirect evidence
Troy, MI, United StatesHQ checked Sep 4, 202611-5061

“Factory Advisors | Operational Excellence Starts on the Factory Floor We don’t act like typical consultants, and we don’t want to be mistaken for them.”

Source: company website · checked Sep 4, 2026
15
Lean Enterprise InstitutePartial evidence
Boston, MA, United StatesHQ checked Sep 4, 202611-5058

“The nonprofit Lean Enterprise Institute (LEI) helps companies and people make things better through lean thinking and practice.”

Source: company website · checked Sep 4, 2026
16
NJMEPIndirect evidence
Cedar Knolls, NJ, United StatesHQ checked Sep 4, 202611-5056

“New Jersey Manufacturing Extension Program, Inc.(NJMEP) is a not-for-profit organization that works with New Jersey’s small to mid-sized businesses to help them improve their…”

Source: company website · checked Sep 4, 2026
17
PowersStrong evidence
Atlanta, NY, United StatesHQ checked Sep 4, 202651-20056

“POWERS is an Atlanta-based management consulting firm that helps manufacturers and service operations convert strategy into measurable floor-level results.”

Source: company website · checked Sep 4, 2026
18
Brecham GroupIndirect evidence
Conway, AR, United StatesHQ checked Sep 4, 202651-20056

“At Brecham Group, we believe your supply chain operations should be a powerful competitive advantage, not a source of inefficiency or frustration.”

Source: company website · checked Sep 4, 2026
19
The Association For Manufacturing Excellence AMEIndirect evidence
Rolling Meadows, IL, United StatesHQ checked Sep 4, 2026n/a48

“The Association for Manufacturing Excellence (AME), is a not-for-profit organization founded in 1985 dedicated to helping companies with continuous improvement and their pursuit…”

Source: company website · checked Sep 4, 2026
20
TenzingPartial evidence
Sewickley, PA, United StatesHQ checked Sep 4, 202611-5045

“Tenzing is a boutique consulting firm delivering measurable results-not decks.”

Source: company website · checked Sep 4, 2026
21
ExcelerateIndirect evidence
San Diego, CA, United StatesHQ checked Sep 4, 202611-5043

“We help our clients translate strategy into action to drive growth, reduce cost or increase efficiency.”

Source: company website · checked Sep 4, 2026
22
Tormod, A Hargrove CompanyIndirect evidence
Mobile, AL, United StatesHQ checked Sep 4, 2026201-50042

“Tormod exists to help manufacturing leaders run great plants.”

Source: company website · checked Sep 4, 2026
23
Process Research & OptimizationPartial evidence
Bonita Springs, FL, United StatesHQ checked Sep 4, 202651-20041

“Process Research & Optimization (PRO) is an international consulting firm dedicated to unlocking our clients’ growth potential and profitability through process innovation.”

Source: company website · checked Sep 4, 2026
24
Streamliners Management ConsultingStrong evidence
Wilmington, DE, United StatesHQ checked Sep 4, 202611-5038

“Streamliners is a management consulting firm specialized in rapid efficiency improvements, operational excellence and fast turnaround for manufacturing and service industries…”

Source: company website · checked Sep 4, 2026
25
The Phoenix Group, Springboro OhioIndirect evidence
Springboro, MI, United StatesHQ checked Sep 4, 202651-20036

“The Phoenix Group Drives Process Improvement and Operational Excellence at Your Organization The Phoenix Group delivers lasting change with organizations we partner with.”

Source: company website · checked Sep 4, 2026

Showing 25 of 1,974 lean management consulting companies based in the United States

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Lean management consulting companies based in the United States at a glance

As of Sep 4, 2026
1-10Median size (employees)
AtlantaLargest hub · 53 HQs
4,353Contacts with mobile numbers
Sep 4, 2026Data refreshed

Companies by employee count

1-10
1,589
11-50
298
51-200
62
201-500
12
501-1,000
7
1,001-5,000
1
5,001-10,000
1
10001+
1

Verified emails by last verification

0–30
0
31–60
249
61–90
1,663
90–180
1,155
180+
20

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 management consulting companies, 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 the United States whose own description of what they do matches “lean management consulting companies”. 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 management consulting companies, and records with no verified work email. Companies headquartered outside United States 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, 3,087 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 management consulting companies by metro

Frequently asked

How many lean management consulting companies are there based in the United States?

RevenueBase identified 1,974 lean management consulting companies headquartered in the 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?

SEI, headquartered in Philadelphia, tops this list with the largest team on record.

Which city has the most lean management consulting companies?

Atlanta leads with 53 headquartered companies, followed by Houston (45) and Chicago (33).

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 3,087 verified decision-maker contacts tracked across these 1,974 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.

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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.

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