Company lists · Data refreshed September 2026

Top 25 System administrator staffing companies based in the United States

Name: System administrator staffing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 4,871 companies tracked

RevenueBase identified 4,871 system administrator staffing companies headquartered in the United States as of September 2026 and tracks 128,176 professional contacts across them, including 18,258 with verified work emails. New York is the largest hub.

This list covers system administrator staffing 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, 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

4,871Companies

128,176Contacts tracked

18,258Verified emails

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The 25 largest system administrator staffing companies based in the United States

Ranked by team size

Top 25 of 4,871 system administrator staffing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to system administrator staffing companies: 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	Appleone Employment Services	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	4,627 contacts →
	Indirect evidence “AppleOne Employment Services is a full-service employment company.” Source: RevenueBase Database · checked Sep 29, 2026
2	Spherion	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	10001+	4,263 contacts →
	Partial evidence “We’re Spherion-a staffing and recruiting pioneer that’s been driving careers and helping businesses grow for over 75 years.” Source: RevenueBase Database · checked Sep 29, 2026
3	Nesco Resource	Indirect evidence	Mayfield Heights, OH, United StatesHQ checked Sep 29, 2026	501-1,000	1,599 contacts →
	Indirect evidence “Companies need talent.” Source: RevenueBase Database · checked Sep 29, 2026
4	Infotree Global Solutions	Indirect evidence	Plymouth, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,545 contacts →
	Indirect evidence “Infotree Global was founded in 2002 in a small office in Canton, MI, Infotree Global had a clear mission; To bring the world’s best talent together with the greatest companies…” Source: RevenueBase Database · checked Sep 29, 2026
5	Brooksource	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,480 contacts →
	Indirect evidence “At Brooksource, relationships are at the center of everything we do.” Source: RevenueBase Database · checked Sep 29, 2026
6	SELF	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	n/a	1,431 contacts →
	Indirect evidence “We are a Full Service Solutions Company specializing in placements of professionals in Information Technology, Finance/Accounting, Energy (front, mid and back office)…” Source: RevenueBase Database · checked Sep 29, 2026
7	TRS Staffing Solutions	Partial evidence	Greenville, United StatesHQ checked Sep 29, 2026	201-500	1,187 contacts →
	Partial evidence “TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.” Source: RevenueBase Database · checked Sep 29, 2026
8	Motion Recruitment	Indirect evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	501-1,000	1,150 contacts →
	Indirect evidence “Motion Recruitment, a Kelly® Company, delivers IT Talent Solutions for Contract, Direct Hire, Managed Solutions and Statement of Work to all of North America from our 21 delivery…” Source: RevenueBase Database · checked Sep 29, 2026
9	Pinnacle Group, INC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 29, 2026	5,001-10,000	1,141 contacts →
	Indirect evidence “Pinnacle Group is a leading provider of information technology and workforce solutions.” Source: RevenueBase Database · checked Sep 29, 2026
10	QPS Employment Group	Partial evidence	Brookfield, WI, United StatesHQ checked Sep 29, 2026	201-500	1,019 contacts →
	Partial evidence “Founded in 1985, QPS Employment Group has grown from a two-person operation to one of the nation's leading staffing and recruiting firms, with more than 300 internal employees…” Source: RevenueBase Database · checked Sep 29, 2026
11	MAX International	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 29, 2026	501-1,000	960 contacts →
	Partial evidence “Max International is a trusted US staffing and recruitment firm committed to connecting top-tier talent with leading organizations across the United States.” Source: RevenueBase Database · checked Sep 29, 2026
12	Remx The Workforce Experts	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	1,001-5,000	901 contacts →
	Partial evidence “RemX is the professional staffing division of EmployBridge, a $3 billion staffing organization with more than 600 offices in the U.S.” Source: RevenueBase Database · checked Sep 29, 2026
13	Imcs Group	Partial evidence	Irving, TX, United StatesHQ checked Sep 29, 2026	201-500	881 contacts →
	Partial evidence “IMCS Group is an IT, Healthcare, and Professional Staffing Company that helps Enterprises optimize the business value of their Staffing investments and enables them to achieve…” Source: RevenueBase Database · checked Sep 29, 2026
14	Elite Network	Indirect evidence	San Francisco Bay, CA, United StatesHQ checked Sep 29, 2026	n/a	841 contacts →
	Indirect evidence “Elite Network is a recruiting firm specializing in accounting and finance, with deep roots in the Bay Area and clients across the country.” Source: RevenueBase Database · checked Sep 29, 2026
15	CFS	Partial evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	790 contacts →
	Partial evidence “Founded by CPA firms in 1994, Creative Financial Staffing has spent over 30 years helping job seekers and employers succeed.” Source: RevenueBase Database · checked Sep 29, 2026
16	Signature Consultants	Indirect evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 29, 2026	1,001-5,000	783 contacts →
	Indirect evidence “We’re stronger together.” Source: RevenueBase Database · checked Sep 29, 2026
17	Primary Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	n/a	766 contacts →
	Partial evidence “Primary Services provides job opportunities for Accounting/Financial, Information Technology, HR, Recruiting, Marketing, Procurement, Call Center and Administrative professionals.” Source: RevenueBase Database · checked Sep 29, 2026
18	Integrated Resources, INC IRI	Partial evidence	Edison, NJ, United StatesHQ checked Sep 29, 2026	501-1,000	762 contacts →
	Partial evidence “Integrated Resources Inc.(IRI) is a professional staffing firm specializing in contract, consulting & full time positions in the area of Information Technology, Life Science and…” Source: RevenueBase Database · checked Sep 29, 2026
19	JSG Johnson Service Group, INC	Partial evidence	Westmont, IL, United StatesHQ checked Sep 29, 2026	5,001-10,000	757 contacts →
	Partial evidence “Johnson Service Group, Inc.(JSG) is a leader in the staffing and consulting services industry, with 40 years of experience investing in people and companies.” Source: RevenueBase Database · checked Sep 29, 2026
20	Cynet Systems	Partial evidence	Sterling, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	732 contacts →
	Partial evidence “Headquartered in Washington DC Metro Area, Cynet Systems is a top talent supplier for companies across North America.” Source: RevenueBase Database · checked Sep 29, 2026
21	Consultadd INC	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	201-500	685 contacts →
	Partial evidence “Consultadd is a leading IT staffing and workforce solutions partner, helping U.S.” Source: RevenueBase Database · checked Sep 29, 2026
22	Kimco Staffing Services, INC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	n/a	682 contacts →
	Partial evidence “You can count on Kimco Staffing to always be a business partner and an employee resource when you need us most.” Source: RevenueBase Database · checked Sep 29, 2026
23	Acro Service Corp	Partial evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	636 contacts →
	Partial evidence “With singular global reach and agility, Acro Service Corporation offers you a unique integrated approach to staffing and consulting solutions.” Source: RevenueBase Database · checked Sep 29, 2026
24	Automation Personnel Services, INC	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 29, 2026	10001+	624 contacts →
	Indirect evidence “Automation Personnel Services was founded in Birmingham, AL almost 30 years ago and has expanded coast to coast with 40 Branch offices in eleven states.” Source: RevenueBase Database · checked Sep 29, 2026
25	Mitchell Martin INC	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	501-1,000	614 contacts →
	Partial evidence “Mitchell Martin Inc.(MMI) is one of the largest employee-owned staffing firms in the U.S, specializing in IT, healthcare, healthcare IT, accounting and finance, and professional…” 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: system administrator staffing companies. 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 system administrator staffing companies.
Partial evidence: Its own public description names part of system administrator staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name system administrator staffing companies. 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 4,871 system administrator staffing companies based in the United States

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System administrator staffing companies based in the United States at a glance

As of Sep 29, 2026

14.2%Verified-email coverage

26.3Average contacts per company

11-50Median size (employees)

3.9%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

1,694

11-50

1,712

51-200

1,016

201-500

266

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,871 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 system administrator staffing companies, 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 the United States whose own description of what they do matches “system administrator staffing companies”. 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 system administrator staffing companies), 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 system administrator staffing 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 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, 18,258 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.

System administrator staffing companies by metro

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 system administrator staffing companies, 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 system administrator staffing companies are there based in the United States?

RevenueBase identified 4,871 system administrator staffing 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?

Appleone Employment Services, headquartered in Glendale, tops this list with the largest team on record.

Which city has the most system administrator staffing companies?

New York leads with 189 headquartered companies, followed by Houston (137) and Dallas (121).

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 18,258 verified decision-maker contacts tracked across these 4,871 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.