Company lists · Data refreshed September 2026

Top 25 Administrative consulting firms based in Irvine, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 69 companies tracked

RevenueBase identified 69 administrative consulting firms headquartered in Irvine, United States as of September 2026 and tracks 1,084 professional contacts across them, including 493 with verified work emails. Across the United States, New York is the largest hub for this category (641 companies); Irvine has 69.

This list covers administrative consulting firms headquartered in Irvine, 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 28, 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 28, 2026 86% judged on-target in blind review

69Companies

1,084Contacts tracked

493Verified emails

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The 25 largest administrative consulting firms based in Irvine, United States

Ranked by team size

Top 25 of 69 administrative consulting firms based in Irvine, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to administrative consulting firms: 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	LSA	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	201-500	332 contacts →
	Partial evidence “LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	Interwest Consulting Group	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	201-500	221 contacts →
	Partial evidence “Interwest specializes in providing professional and consulting services to public agencies across California, Nevada, Colorado, and beyond.” Source: RevenueBase Database · checked Sep 28, 2026
3	EPD Solutions, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	51-200	64 contacts →
	Indirect evidence “EPD was created to assist clients through the complex regulatory and interdisciplinary process required to bring projects to fruition in the most thoughtful manner.” Source: RevenueBase Database · checked Sep 28, 2026
4	RJI Cpas	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	51-200	59 contacts →
	Partial evidence “RJI CPAs is a full-service accounting and consulting firm based in Irvine, California.” Source: RevenueBase Database · checked Sep 28, 2026
5	Intueor Consulting, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “Intueor specializes in Strategy, Operations & Business Productivity advisory work.” Source: RevenueBase Database · checked Sep 28, 2026
6	Compassx Group	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	47 contacts →
	Partial evidence “CompassX is a local-model consulting firm headquartered in SoCal.” Source: RevenueBase Database · checked Sep 28, 2026
7	Concannon Business Consulting	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	45 contacts →
	Indirect evidence “When resources and knowledge are constrained, your team will feel the pressure and your business may be at-risk for delays, lost revenue, and lost trust internally and externally.” Source: RevenueBase Database · checked Sep 28, 2026
8	MLC And Associates	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	38 contacts →
	Partial evidence “MLC and Associates is an award-winning, world-class management consulting firm, recognized for helping companies in every industry with business continuity, corporate performance…” Source: RevenueBase Database · checked Sep 28, 2026
9	Pursue Health LLC	Strong evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	51-200	37 contacts →
	Strong evidence “Pursue Health provides consulting and administrative services to various sectors within the healthcare industry to promote operation efficiency, an environment of regulatory…” Source: RevenueBase Database · checked Sep 28, 2026
10	Connexus HUB	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Connexus Hub is a boutique business and technology advisory firm that specializes in CIO advisory, IT PMO support, and business transformation services, training, and operations…” Source: RevenueBase Database · checked Sep 28, 2026
11	Mentor Global Consultants	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “MENTOR is a management consulting firm that helps organizations to improve performance and reach their full potential, by offering a unique combination of business solutions.” Source: RevenueBase Database · checked Sep 28, 2026
12	ADDA	Strong evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Strong evidence “ADDA is a consulting firm that offers HR, Payroll, Benefits Administration, and Talent solutions.” Source: RevenueBase Database · checked Sep 28, 2026
13	Matrixpoint Consulting	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “MatrixPoint Consulting helps brand executives in QSR, CPG, and retail grow through marketing they can measure.” Source: RevenueBase Database · checked Sep 28, 2026
14	Xpand Legal Consulting, LLC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “Xpand’s taking a fresh look at the processes and procedures that have dominated the legal administration space for decades and quickly finding there is plenty of opportunity to…” Source: RevenueBase Database · checked Sep 28, 2026
15	Take Ctrl	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Consulting - We provide business consulting to small businesses in the Orange County area.” Source: RevenueBase Database · checked Sep 28, 2026
16	International Executive Consulting, LLC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Your Vision, Our Expertise - A Prosperous Future Built Together At International Executive Consulting, we specialize in driving business transformation and organizational change…” Source: RevenueBase Database · checked Sep 28, 2026
17	Copperpillar Consulting, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Copperpillar excels in the telecommunications industry with core services that enable our clients to meet fast paced demands and deadlines.” Source: RevenueBase Database · checked Sep 28, 2026
18	Logis Accounting & Finance Consulting Talent Search	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “Our partners have more than 50 years of combined experience serving clients with top finance and accounting consulting and direct hire talent.” Source: RevenueBase Database · checked Sep 28, 2026
19	Daneco Group INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
20	Professional Corporate Consultants	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	201-500	4 contacts →
	Partial evidence “Professional Corporate Consultants is a full-service project consulting firm with a reputation for delivering customized solutions to meet the diverse needs of public and private…” Source: RevenueBase Database · checked Sep 28, 2026
21	The Fantastic Labs	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “Empower Your Business Potential with The Fantastic Labs!” Source: RevenueBase Database · checked Sep 28, 2026
22	Growthport Partners, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “The legal community has priced itself out of the mid-sized business market and it has no incentive to offer, let alone deliver, quality preventive legal services either in the…” Source: RevenueBase Database · checked Sep 28, 2026
23	Transparity Group	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Who we are The Transparity Group is a team of trusted partners providing consulting services to individuals and small business in the areas of Career/Executive Coaching…” Source: RevenueBase Database · checked Sep 28, 2026
24	Exxeed	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “EXXEED delivers Smart People Solutions™ that help leaders and their organizations grow and transform.” Source: RevenueBase Database · checked Sep 28, 2026
25	AIA	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial evidence “AIA Ancile Insurance Agency is a full service consulting firm headquartered in Irvine, California.” Source: RevenueBase Database · checked Sep 28, 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: administrative consulting firms. 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 administrative consulting firms.
Partial evidence: Its own public description names part of administrative consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name administrative consulting firms. 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 69 administrative consulting firms based in Irvine, United States

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Administrative consulting firms based in Irvine, United States at a glance

As of Sep 28, 2026

45.5%Verified-email coverage

15.7Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 69 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 administrative consulting firms, 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 Irvine, United States whose own description of what they do matches “administrative consulting firms”. 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 administrative consulting firms), 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 administrative consulting firms, and records with no verified work email. Companies headquartered outside Irvine 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, 493 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 28, 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.

Administrative consulting firms 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 administrative consulting firms, 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 administrative consulting firms are there based in Irvine, United States?

RevenueBase identified 69 administrative consulting firms headquartered in Irvine, 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?

LSA, headquartered in Irvine, tops this list with the largest team on record.

Which city in the United States has the most administrative consulting firms?

New York leads the United States with 641 headquartered companies, followed by Washington (560) and Atlanta (452). Irvine has 69.

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 493 verified decision-maker contacts tracked across these 69 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 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 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.