Company lists · Data refreshed September 2026

Top 25 Drug development staffing firms based in the United States

Name: Drug development staffing 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 6,361 companies tracked

RevenueBase identified 6,361 drug development staffing firms headquartered in the United States as of September 2026 and tracks 268,055 professional contacts across them, including 79,283 with verified work emails. New York is the largest hub.

This list covers drug development staffing firms 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 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

6,361Companies

268,055Contacts tracked

79,283Verified emails

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The 25 largest drug development staffing firms based in the United States

Ranked by team size

Top 25 of 6,361 drug development staffing firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to drug development staffing 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	PPD	Strong evidence	Waltham, MA, United StatesHQ checked Sep 28, 2026	10001+	20,530 contacts →
	Strong evidence “The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…” Source: RevenueBase Database · checked Sep 28, 2026
2	Fortrea	Partial evidence	Research Triangle Park, NC, United StatesHQ checked Sep 28, 2026	10001+	10,632 contacts →
	Partial evidence “Fortrea (Nasdaq: FTRE) is a leading global clinical research organization (CRO) dedicated to providing innovative clinical development solutions to the life sciences industry.” Source: RevenueBase Database · checked Sep 28, 2026
3	Medpace	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,960 contacts →
	Partial evidence “Medpace is a scientifically-driven, global, full-service clinical contract research organization (CRO) providing Phase I-IV clinical development services to the biotechnology…” Source: RevenueBase Database · checked Sep 28, 2026
4	Covance	Strong evidence	Princeton, NJ, United StatesHQ checked Sep 28, 2026	10001+	5,220 contacts →
	Strong evidence “As the drug development business of Laboratory Corporation of America Holdings (Labcorp) and the world’s most comprehensive drug development #CRO service company, we have helped…” Source: RevenueBase Database · checked Sep 28, 2026
5	PCI Pharma Services	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	5,001-10,000	4,342 contacts →
	Indirect evidence “We are PCI Pharma Services.” Source: RevenueBase Database · checked Sep 28, 2026
6	Worldwide Clinical Trials	Partial evidence	Research Triangle Park, NC, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,440 contacts →
	Partial evidence “Worldwide Clinical Trials (Worldwide) is a global CRO serving development-driven biopharmaceutical companies, with more than 4,400 professionals operating across more than 70…” Source: RevenueBase Database · checked Sep 28, 2026
7	Eversana	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	5,001-10,000	3,149 contacts →
	Indirect evidence “EVERSANA® is a leading independent provider of global services to the life sciences industry.” Source: RevenueBase Database · checked Sep 28, 2026
8	Premier Research	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,584 contacts →
	Indirect evidence “Premier Research International LLC (Premier) is a global leader in clinical research and consulting services with expertise in driving an efficient and effective path to market…” Source: RevenueBase Database · checked Sep 28, 2026
9	Propharma	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,079 contacts →
	Indirect evidence “At ProPharma, we help pharmaceutical, biotechnology, and medical device companies bring life-changing therapies to market.” Source: RevenueBase Database · checked Sep 28, 2026
10	Patheon	Strong evidence	Waltham, MA, United StatesHQ checked Sep 28, 2026	10001+	2,004 contacts →
	Strong evidence “Thermo Fisher Scientific provides industry-leading pharma services for drug development, clinical trial logistics, and commercial manufacturing through our Patheon™ brand.” Source: RevenueBase Database · checked Sep 28, 2026
11	Remedy Intelligent Staffing	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 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 28, 2026
12	Soliant	Indirect evidence	Peachtree Corners, GA, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,910 contacts →
	Indirect evidence “Soliant is a leader in human capital solutions within the education, healthcare, and pharmacy sectors.” Source: RevenueBase Database · checked Sep 28, 2026
13	Addison Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
14	Precision For Medicine	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,781 contacts →
	Partial evidence “Precision for Medicine is an industry-leading global clinical research services organization, purpose-built to improve the clinical research and development process for new…” Source: RevenueBase Database · checked Sep 28, 2026
15	MEDIX	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
16	KBI Biopharma	Strong evidence	Durham, NC, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,645 contacts →
	Strong evidence “KBI Biopharma is an award-winning biopharmaceutical contract services organization providing fully-integrated, accelerated drug development and biomanufacturing services to…” Source: RevenueBase Database · checked Sep 28, 2026
17	Nesco Resource	Indirect evidence	Mayfield Heights, OH, United StatesHQ checked Sep 28, 2026	501-1,000	1,599 contacts →
	Indirect evidence “Companies need talent.” Source: RevenueBase Database · checked Sep 28, 2026
18	Syneos Health Clinical Solutions	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 28, 2026	10001+	1,569 contacts →
	Indirect evidence “Syneos Health® is a leading fully integrated biopharmaceutical solutions organization built to accelerate customer success.” Source: RevenueBase Database · checked Sep 28, 2026
19	Infotree Global Solutions	Indirect evidence	Plymouth, MI, United StatesHQ checked Sep 28, 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 28, 2026
20	Triage Staffing Healthcare Staffing	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 28, 2026	n/a	1,538 contacts →
	Indirect evidence “In recruiting, stating actual facts has become: Foreign \| Uncommon \| Taboo.” Source: RevenueBase Database · checked Sep 28, 2026
21	Clinchoice	Partial evidence	Horsham, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,516 contacts →
	Partial evidence “ClinChoice is a leading global full & functional service CRO, renowned for its exceptional product development and lifecycle management capabilities across the pharmaceutical…” Source: RevenueBase Database · checked Sep 28, 2026
22	ALKU	Indirect evidence	Andover, MA, United StatesHQ checked Sep 28, 2026	201-500	1,480 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
23	ASK Consulting	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 28, 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 28, 2026
24	Cambrex	Strong evidence	East Rutherford, NJ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,294 contacts →
	Strong evidence “Cambrex is a leading global contract development and manufacturing organization (CDMO) that provides drug substance development and manufacturing across the entire drug lifecycle…” Source: RevenueBase Database · checked Sep 28, 2026
25	GHR Healthcare	Indirect evidence	Blue Bell, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,241 contacts →
	Indirect evidence “For over 30 years, GHR Healthcare has been the bridge between healthcare professionals and the facilities that need them.” 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: drug development staffing 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 drug development staffing firms.
Partial evidence: Its own public description names part of drug development staffing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name drug development staffing 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 6,361 drug development staffing firms based in the United States

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Drug development staffing firms based in the United States at a glance

As of Sep 28, 2026

29.6%Verified-email coverage

42.1Average contacts per company

11-50Median size (employees)

3.6%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,036

11-50

1,760

51-200

937

201-500

330

501-1,000

135

1,001-5,000

110

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 6,361 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 drug development staffing 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 the United States whose own description of what they do matches “drug development staffing 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 drug development staffing 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 drug development staffing firms, 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, 79,283 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.

Drug development staffing firms 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 drug development staffing 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 drug development staffing firms are there based in the United States?

RevenueBase identified 6,361 drug development staffing firms 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?

PPD, headquartered in Waltham, tops this list with the largest team on record.

Which city has the most drug development staffing firms?

New York leads with 229 headquartered companies, followed by Boston (138) and San Diego (135).

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 79,283 verified decision-maker contacts tracked across these 6,361 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.