Company lists · Data refreshed September 2026

Top 25 Analytical chemistry staffing agencies based in the United States

Name: Analytical chemistry 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 27, 2026 1,254 companies tracked

RevenueBase identified 1,254 analytical chemistry staffing agencies headquartered in the United States as of September 2026 and tracks 39,148 professional contacts across them, including 8,505 with verified work emails. New York is the largest hub.

This list covers analytical chemistry 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 27, 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 27, 2026 86% judged on-target in blind review

1,254Companies

39,148Contacts tracked

8,505Verified emails

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The 25 largest analytical chemistry staffing agencies based in the United States

Ranked by team size

Top 25 of 1,254 analytical chemistry staffing agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to analytical chemistry 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 27, 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 27, 2026
2	SCIEX	Partial evidence	Framingham, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,329 contacts →
	Partial evidence “SCIEX helps to improve the world we live in by enabling scientists and laboratory analysts to find answers to the complex analytical challenges they face.” Source: RevenueBase Database · checked Sep 27, 2026
3	Eurofins Lancaster Laboratories	Indirect evidence	Lancaster, PA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,638 contacts →
	Indirect evidence “Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Source: RevenueBase Database · checked Sep 27, 2026
4	Nesco Resource	Indirect evidence	Mayfield Heights, OH, United StatesHQ checked Sep 27, 2026	501-1,000	1,599 contacts →
	Indirect evidence “Companies need talent.” Source: RevenueBase Database · checked Sep 27, 2026
5	TRS Staffing Solutions	Partial evidence	Greenville, United StatesHQ checked Sep 27, 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 27, 2026
6	Planet Pharma	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Founded in 2012, Planet Pharma is a global leader in life sciences recruitment and staffing, specializing in Pharmaceuticals, Biotechnology, Medical Device, Labs & Healthcare…” Source: RevenueBase Database · checked Sep 27, 2026
7	Nelson Labs	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 27, 2026	501-1,000	775 contacts →
	Strong evidence “Nelson Labs is a global leader in microbiological and analytical chemistry testing and advisory services for the medical device and pharmaceutical industries.” Source: RevenueBase Database · checked Sep 27, 2026
8	Integrated Resources, INC IRI	Partial evidence	Edison, NJ, United StatesHQ checked Sep 27, 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 27, 2026
9	Phenomenex	Strong evidence	Torrance, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	660 contacts →
	Strong evidence “Phenomenex is a global technology leader committed to developing novel analytical chemistry solutions that solve the separation and purification challenges of researchers in…” Source: RevenueBase Database · checked Sep 27, 2026
10	Automation Personnel Services, INC	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 27, 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 27, 2026
11	Mitchell Martin INC	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 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 27, 2026
12	EASI	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 27, 2026	1,001-5,000	526 contacts →
	Indirect evidence “EASi is now Actalent.” Source: RevenueBase Database · checked Sep 27, 2026
13	Enthalpy Analytical	Indirect evidence	North Little Rock, AR, United StatesHQ checked Sep 27, 2026	501-1,000	349 contacts →
	Indirect evidence “Our laboratory service experts provide clients with precision testing support, innovative scientific approaches, and high-quality data that delivers a sense of certainty.” Source: RevenueBase Database · checked Sep 27, 2026
14	Labour Ready Temporary Service	Partial evidence	Tacoma, WA, United StatesHQ checked Sep 27, 2026	51-200	336 contacts →
	Partial evidence “We offer powered staffing solutions for your business.” Source: RevenueBase Database · checked Sep 27, 2026
15	Ascendo Resources	Partial evidence	Coral Gables, FL, United StatesHQ checked Sep 27, 2026	201-500	322 contacts →
	Partial evidence “Ascendo Resources is a certified minority owned award-winning staffing and consulting firm that places quality accounting, financial services, banking, compliance, healthcare…” Source: RevenueBase Database · checked Sep 27, 2026
16	Atl, A Bureau Veritas Company	Indirect evidence	Milford, OH, United StatesHQ checked Sep 27, 2026	501-1,000	314 contacts →
	Indirect evidence “Founded in 1987, ATL, A Bureau Veritas Company, is a Scientific Sourcing Solutions Company.” Source: RevenueBase Database · checked Sep 27, 2026
17	MJ Morgan Group	Indirect evidence	Lutherville, MD, United StatesHQ checked Sep 27, 2026	n/a	299 contacts →
	Indirect evidence “People Built.” Source: RevenueBase Database · checked Sep 27, 2026
18	JOULÉ	Indirect evidence	Edison, NJ, United StatesHQ checked Sep 27, 2026	51-200	254 contacts →
	Indirect evidence “At Joulé, we believe our world is filled with possibilities – where character, integrity, and commitment drive our purpose.” Source: RevenueBase Database · checked Sep 27, 2026
19	Alpha Analytical	Partial evidence	Westborough, MA, United StatesHQ checked Sep 27, 2026	501-1,000	254 contacts →
	Partial evidence “Since 1987, Alpha Analytical, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
20	Simplified Labor Staffing Solutions INC	Indirect evidence	Brea, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	242 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
21	Verstela	Partial evidence	Everett, WA, United StatesHQ checked Sep 27, 2026	501-1,000	236 contacts →
	Partial evidence “Verstela is a premier staffing provider, offering temporary, temp-to-hire, and direct hire solutions across a wide range of industries.” Source: RevenueBase Database · checked Sep 27, 2026
22	Staffquick	Partial evidence	Edwardsville, IL, United StatesHQ checked Sep 27, 2026	1,001-5,000	229 contacts →
	Partial evidence “StaffQuick is a full-service staffing agency that specializes in Temporary, Temporary to Hire, and Permanent Placements across all industries.” Source: RevenueBase Database · checked Sep 27, 2026
23	GL Staffing	Partial evidence	Margate, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	202 contacts →
	Partial evidence “GL Staffing Services is one of the largest privately owned staffing companies in Florida.” Source: RevenueBase Database · checked Sep 27, 2026
24	NVT Staffing, INC	Partial evidence	Falls Church, VA, United StatesHQ checked Sep 27, 2026	501-1,000	199 contacts →
	Partial evidence “NVT Staffing is a direct reflection of the rapid growth and expansion of our parent company, Northern Virginia Temporaries, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
25	RJ LEE Group	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 27, 2026	201-500	194 contacts →
	Indirect evidence “RJ Lee Group provides comprehensive laboratory testing and scientific consulting services.” Source: RevenueBase Database · checked Sep 27, 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: analytical chemistry 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 analytical chemistry staffing agencies.
Partial evidence: Its own public description names part of analytical chemistry staffing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name analytical chemistry 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 1,254 analytical chemistry staffing agencies based in the United States

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Analytical chemistry staffing agencies based in the United States at a glance

As of Sep 27, 2026

21.7%Verified-email coverage

31.2Average contacts per company

11-50Median size (employees)

2.6%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

506

11-50

384

51-200

222

201-500

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 1,254 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 analytical chemistry 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 “analytical chemistry 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 analytical chemistry 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 analytical chemistry 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, 8,505 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 27, 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.

Analytical chemistry staffing agencies by metro

Analytical chemistry staffing agencies in New York33
Analytical chemistry staffing agencies in Houston27

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 analytical chemistry 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 analytical chemistry staffing agencies are there based in the United States?

RevenueBase identified 1,254 analytical chemistry 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 analytical chemistry staffing agencies?

New York leads with 33 headquartered companies, followed by Houston (27) and San Diego (21).

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 8,505 verified decision-maker contacts tracked across these 1,254 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 27, 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.