Company lists · Data refreshed September 2026

Top 25 Scientific staffing agencies based in the United States

Name: Scientific staffing agencies 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 8,731 companies tracked

RevenueBase identified 8,731 scientific staffing agencies headquartered in the United States as of September 2026 and tracks 276,926 professional contacts across them, including 41,915 with verified work emails. New York is the largest hub.

This list covers scientific staffing agencies 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

8,731Companies

276,926Contacts tracked

41,915Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest scientific staffing agencies based in the United States

Ranked by team size

Top 25 of 8,731 scientific staffing agencies 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 scientific staffing agencies: 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	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
2	Select Staffing	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	10001+	3,934 contacts →
	Partial evidence “Select Staffing is a leading provider of temporary staffing and employment services in the U.S, with nationwide operations across multiple contingent staffing sectors.” Source: RevenueBase Database · checked Sep 29, 2026
3	Beacon Hill	Partial evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	3,238 contacts →
	Partial evidence “Beacon Hill was founded to set a new standard in search, career placement and flexible staffing.” Source: RevenueBase Database · checked Sep 29, 2026
4	Aureus Medical Group	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 29, 2026	501-1,000	2,529 contacts →
	Indirect evidence “Aureus Medical Group® is now Medical Solutions.” Source: RevenueBase Database · checked Sep 29, 2026
5	Airswift	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	501-1,000	2,128 contacts →
	Indirect evidence “We support STEM professionals looking for jobs with exceptional firms in the technology and engineering sectors.” Source: RevenueBase Database · checked Sep 29, 2026
6	Rose International	Partial evidence	Chesterfield, MO, United StatesHQ checked Sep 29, 2026	5,001-10,000	2,061 contacts →
	Partial evidence “Rose International is a leading provider of Staffing and Total Talent Solutions to corporations and government agencies, employing thousands of people across the U.S, Canada and…” Source: RevenueBase Database · checked Sep 29, 2026
7	Comphealth	Partial evidence	Midvale, UT, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,012 contacts →
	Partial evidence “CompHealth is one of the largest healthcare staffing companies in the United States offering permanent, locum tenens, travel and other placements for healthcare providers.” Source: RevenueBase Database · checked Sep 29, 2026
8	Remedy Intelligent Staffing	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	10001+	1,948 contacts →
	Partial evidence “Remedy Intelligent Staffing is a nationwide professional staffing organization with more than 50 years of recruiting and selection expertise to match job candidates with positions…” Source: RevenueBase Database · checked Sep 29, 2026
9	Addison Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,840 contacts →
	Indirect evidence “Addison Group provides comprehensive talent solutions and consulting services across diverse practice areas, including Non-Clinical Healthcare, Information Technology (IT), Human…” Source: RevenueBase Database · checked Sep 29, 2026
10	Barton Associates	Partial evidence	Peabody, MA, United StatesHQ checked Sep 29, 2026	501-1,000	1,829 contacts →
	Partial evidence “Welcome to Barton Associates, the locum tenens staffing and recruiting experts.” Source: RevenueBase Database · checked Sep 29, 2026
11	Labormax Staffing	Partial evidence	Kearney, MO, United StatesHQ checked Sep 29, 2026	n/a	1,755 contacts →
	Partial evidence “LaborMAX Staffing is your reliable provider of quality pre-screened contingent workers.” Source: RevenueBase Database · checked Sep 29, 2026
12	MEDIX	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	1,753 contacts →
	Indirect evidence “Medix provides workforce solutions to clients and creates opportunity for talent in the Healthcare, Life Sciences, Engineering and Technology fields.” Source: RevenueBase Database · checked Sep 29, 2026
13	Elite Staffing INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	10001+	1,661 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
14	Surge Staffing	Partial evidence	Columbus, OH, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,622 contacts →
	Partial evidence “For over 57 years, Surge has been a national leader in staffing solutions, workforce management and workforce program solutions.” Source: RevenueBase Database · checked Sep 29, 2026
15	Onin Staffing	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 29, 2026	10001+	1,614 contacts →
	Partial evidence “Ōnin Staffing, a company of The Ōnin Group, is a national light industrial and clerical staffing agency.” Source: RevenueBase Database · checked Sep 29, 2026
16	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
17	Weatherby Healthcare	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 29, 2026	n/a	1,597 contacts →
	Partial evidence “Founded in 1995, Weatherby Healthcare has established itself as a leading expert in locum tenens staffing for physicians, physician assistants, and nurse practitioners.” Source: RevenueBase Database · checked Sep 29, 2026
18	Integrity Staffing Solutions	Indirect evidence	Newark, DE, United StatesHQ checked Sep 29, 2026	n/a	1,581 contacts →
	Indirect evidence “Opportunity is everything.” Source: RevenueBase Database · checked Sep 29, 2026
19	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
20	Triage Staffing Healthcare Staffing	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 29, 2026	n/a	1,538 contacts →
	Indirect evidence “In recruiting, stating actual facts has become: Foreign \| Uncommon \| Taboo.” Source: RevenueBase Database · checked Sep 29, 2026
21	Host Healthcare, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,460 contacts →
	Partial evidence “Host Healthcare is a travel healthcare staffing agency specializing in travel nursing, allied and therapy jobs.” Source: RevenueBase Database · checked Sep 29, 2026
22	System ONE	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 29, 2026	5,001-10,000	1,386 contacts →
	Partial evidence “System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life…” Source: RevenueBase Database · checked Sep 29, 2026
23	ASK Consulting	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 29, 2026	501-1,000	1,296 contacts →
	Indirect evidence “ASK Consulting is an award-winning technology and professional services recruiting firm servicing Fortune 500 organizations nationally.” Source: RevenueBase Database · checked Sep 29, 2026
24	Coworx Staffing Services	Partial evidence	Morristown, NJ, United StatesHQ checked Sep 29, 2026	201-500	1,286 contacts →
	Partial evidence “CoWorx Staffing Services is one of the largest staffing firms in the U.S.” Source: RevenueBase Database · checked Sep 29, 2026
25	Flexcare	Indirect evidence	Roseville, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,264 contacts →
	Indirect evidence “At FlexCare, we know that solving healthcare talent challenges isn’t just about filling roles-it’s about building sustainable solutions that drive better patient care, stronger…” 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: scientific staffing agencies. 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 scientific staffing agencies.
Partial evidence: Its own public description names part of scientific staffing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name scientific staffing agencies. 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 8,731 scientific staffing agencies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 41,915 reachable decision-makers.

Free signup · no credit card

View the full list →

Scientific staffing agencies based in the United States at a glance

As of Sep 29, 2026

15.1%Verified-email coverage

31.7Average 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

3,518

11-50

2,516

51-200

1,595

201-500

602

501-1,000

252

1,001-5,000

167

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 8,731 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 scientific staffing agencies, 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 “scientific staffing agencies”. 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 scientific staffing agencies), 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 scientific staffing agencies, 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, 41,915 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.

Scientific staffing agencies 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 scientific staffing agencies, 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 scientific staffing agencies are there based in the United States?

RevenueBase identified 8,731 scientific staffing agencies 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?

Spherion, headquartered in Atlanta, tops this list with the largest team on record.

Which city has the most scientific staffing agencies?

New York leads with 338 headquartered companies, followed by Houston (214) and Atlanta (168).

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 41,915 verified decision-maker contacts tracked across these 8,731 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.

Ready to reach these companies? Verified emails and direct dials for all 8,731 scientific staffing agencies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Scientific staffing agencies by geography

Browse the directory

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.