Company lists · Data refreshed September 2026

Top 25 Administrative consulting firms based in the United States

Name: Administrative consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 18,155 companies tracked

RevenueBase identified 18,155 company matches for administrative consulting firms associated with the United States as of September 2026 and tracks 134,493 professional contacts across them, including 47,418 with verified work emails and 51,161 with mobile numbers. New York is the largest hub.

This list covers company matches for administrative consulting firms 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 September 28, 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 Sep 28, 2026 How this list was built

18,155Companies

134,493Contacts tracked

47,418Verified emails

51,161Mobile numbers

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The 25 largest administrative consulting firms based in the United States

Ranked by team size

Top 25 of 18,155 company matches for administrative consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Protiviti	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	8,779 contacts →
	Exact match “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Kearney	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	5,001-10,000	6,978 contacts →
	Exact match “As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	L.E.K. Consulting	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,093 contacts →
	Exact match “L.E.K.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Public Consulting Group	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,694 contacts →
	Exact match “Public Consulting Group (PCG) is a leading public sector solutions implementation and operations improvement firm that partners with health, education, and human services agencies…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Analysis Group	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,781 contacts →
	Exact match “Analysis Group is one of the largest international economics consulting firms, with more than 1,500 professionals across 15 offices in North America, Europe, and Asia.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	ALKU	Exact match	Andover, MA, United StatesHQ recorded Sep 28, 2026	201-500	1,480 contacts →
	Exact match “ALKU® is a highly specialized consulting services firm focused on deploying highly skilled consulting resources in the areas of Technologies, HCIT, Life Sciences, and Government…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Charles River Associates	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,479 contacts →
	Exact match “Charles River Associates (CRA) is a global consulting firm specializing in litigation, regulatory, financial, and management consulting.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Davey Resource Group, INC	Exact match	Kent, OH, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,395 contacts →
	Exact match “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Ardurra	Exact match	Miami, FL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,260 contacts →
	Exact match “Expertly balancing experience and innovation to deliver unique solutions to public and private clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Riveron	Exact match	Dallas, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,160 contacts →
	Exact match “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	SEGAL	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,149 contacts →
	Exact match “Segal is a leading employee-owned consulting firm with more than 1,100 professionals across North America, including 150+ credentialed actuaries.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	W3global	Exact match	Frisco, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	1,149 contacts →
	Exact match “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	The Vertex Companies LLC	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	765 contacts →
	Exact match “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	ERG	Exact match	Concord, MA, United StatesHQ recorded Sep 28, 2026	501-1,000	663 contacts →
	Exact match “ERG is a multidisciplinary consulting firm offering a broad range of professional services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	SEI	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 28, 2026	501-1,000	618 contacts →
	Exact match “SEI is a management consulting firm delivering fresh perspectives and reliable results.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	GSA National	Exact match	Fairfax, VA, United StatesHQ recorded Sep 28, 2026	201-500	558 contacts →
	Exact match “GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Solomonedwards	Exact match	Wayne, PA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	557 contacts →
	Exact match “For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	DLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	201-500	546 contacts →
	Exact match “DLC is an award-winning industry leader in Finance, Accounting, Program Management & Process Improvement Consulting.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Little Diversified Architectural Consulting	Exact match	Little Global, VA, United StatesHQ recorded Sep 28, 2026	201-500	509 contacts →
	Exact match “At Little, we deliver results far beyond architecture-results you wouldn’t expect from an architectural firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Brown Edwards	Exact match	Roanoke, VA, United StatesHQ recorded Sep 28, 2026	201-500	496 contacts →
	Exact match “Providing Professional Business Advisory and Consulting Services including tax, accounting and IT services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	The Mannik & Smith Group, INC	Exact match	Maumee, OH, United StatesHQ recorded Sep 28, 2026	501-1,000	467 contacts →
	Exact match “Technical skill, relationships and leadership are the foundation of The Mannik & Smith Group, Inc.(MSG) and have been not just a tradition, but a way of doing business for 70…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	USI Consulting Group	Exact match	Glastonbury, CT, United StatesHQ recorded Sep 28, 2026	501-1,000	453 contacts →
	Exact match “USI Consulting Group (USICG), an industry leading, full-service retirement plan consulting and benefits administration firm, has been helping employers enable their workforce to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Resultant	Exact match	Indianapolis, IN, United StatesHQ recorded Sep 28, 2026	201-500	431 contacts →
	Exact match “We are a passionate team of engineers, mathematicians, data analysts, project managers, and business consultants.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Career Group	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 28, 2026	51-200	416 contacts →
	Exact match “Career Group is a widely recognized name in corporate and administrative recruitment.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Weaver Consultants Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	201-500	382 contacts →
	Exact match “From its inception in 1991, Weaver Consultants Group has been founded upon the tenets of attentive and responsive customer service, strong project management, and solid internal…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “administrative consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 18,155 administrative consulting firms based in the United States

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Administrative consulting firms based in the United States at a glance

As of Sep 28, 2026

35.3%Verified-email coverage

38.0%Mobile-number coverage

7.4Average contacts per company

1-10Median size (employees)

3.8%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

14,579

11-50

2,901

51-200

659

201-500

126

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 31.0d

25,5920–30

23,85331–60

1,47461–90

2290–180

292180+

Company record updated

Median 89.0d

00–30

41,59631–60

35,94861–90

61,33990–180

7,989180+

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 “administrative consulting firms” 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 47,418 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 September 28, 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.

Administrative consulting firms by metro

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 “administrative consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many administrative consulting firms are there based in the United States?

RevenueBase identified 18,155 company matches for administrative consulting firms associated with the United States as of September 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?

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

Which city has the most administrative consulting firms?

New York leads with 695 company records, followed by Washington (560) and Atlanta (452).

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 47,418 professional contacts with verified work emails tracked across these 18,155 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 September 28, 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.