Company lists · Data refreshed September 2026

Top 25 Clinical research staffing agencies worldwide

Name: Clinical research staffing agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 7,208 companies tracked

RevenueBase identified 7,208 company matches for clinical research staffing agencies worldwide as of September 2026 and tracks 270,298 professional contacts across them, including 96,358 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clinical research staffing agencies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 2026. Country and city lists for clinical research staffing agencies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built

7,208Companies

270,298Contacts tracked

96,358Verified emails

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The 25 largest clinical research staffing agencies worldwide

Ranked by team size

Top 25 of 7,208 company matches for clinical research staffing agencies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Icon PLC	Exact match	Dublin, JapanHQ recorded Sep 27, 2026	10001+	26,555 contacts →
	Exact match “Since our foundation in Dublin, Ireland in 1990, our mission has been to help our clients to accelerate the development of drugs and devices that save lives and improve quality of…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2	PPD	Exact match	Waltham, MA, United StatesHQ recorded Sep 27, 2026	10001+	20,530 contacts →
	Exact match “The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3	Parexel	Exact match	Raleigh, NC, United StatesHQ recorded Sep 27, 2026	10001+	19,257 contacts →
	Exact match “Parexel is a leading global clinical research organization (CRO) providing insights-driven Clinical and Consulting solutions to the world’s life sciences industry.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	Fortrea	Exact match	Research Triangle Park, NC, United StatesHQ recorded Sep 27, 2026	10001+	10,632 contacts →
	Exact match “Fortrea (Nasdaq: FTRE) is a leading global clinical research organization (CRO) dedicated to providing innovative clinical development solutions to the life sciences industry.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	Medpace	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 27, 2026	5,001-10,000	5,960 contacts →
	Exact match “Medpace is a scientifically-driven, global, full-service clinical contract research organization (CRO) providing Phase I-IV clinical development services to the biotechnology…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6	Worldwide Clinical Trials	Exact match	Research Triangle Park, NC, United StatesHQ recorded Sep 27, 2026	1,001-5,000	3,440 contacts →
	Exact match “Worldwide Clinical Trials (Worldwide) is a global CRO serving development-driven biopharmaceutical companies, with more than 4,400 professionals operating across more than 70…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7	Premier Research	Exact match	Morrisville, NC, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,584 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8	PSI CRO	Exact match	Zug, SwitzerlandHQ recorded Sep 27, 2026	1,001-5,000	2,494 contacts →
	Exact match “PSI is a leading full-service global Contract Research Organization whose key strength is predictable patient enrollment across multiple therapeutic areas.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9	Signant Health	Exact match	Blue Bell, PA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,083 contacts →
	Exact match “For 25+ years, Signant Health has been pioneering solutions and methodologies that propel clinical research programs toward regulatory success.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	Propharma	Exact match	Raleigh, NC, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,079 contacts →
	Exact match “At ProPharma, we help pharmaceutical, biotechnology, and medical device companies bring life-changing therapies to market.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11	Precision For Medicine	Exact match	Bethesda, MD, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,781 contacts →
	Exact match “Precision for Medicine is an industry-leading global clinical research services organization, purpose-built to improve the clinical research and development process for new…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	Novotech	Exact match	Singapore, AustraliaHQ recorded Sep 27, 2026	1,001-5,000	1,778 contacts →
	Exact match “Novotech is a globally recognized full-service clinical research organization (CRO) and scientific advisory company that provides biotech and small- to mid-sized pharma companies…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13	Cliantha Research Limited	Exact match	Ahmedabad, IndiaHQ recorded Sep 27, 2026	1,001-5,000	1,612 contacts →
	Exact match “Cliantha Research, full-service clinical research organization (CRO), provides comprehensive and integrated offerings in Early Phase (BA/BE and Phase I) trials, Late Phase (Phase…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14	CYTEL	Exact match	Cambridge, MA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,580 contacts →
	Exact match “Cytel is the world’s leading data-science CRO, driving advancements in human health through robust analytics and innovative clinical trial software.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15	Triage Staffing Healthcare Staffing	Exact match	Omaha, NE, United StatesHQ recorded Sep 27, 2026	n/a	1,538 contacts →
	Exact match “In recruiting, stating actual facts has become: Foreign \| Uncommon \| Taboo.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	Adecco Medical	Exact match	Villeurbanne, FranceHQ recorded Sep 27, 2026	201-500	1,493 contacts →
	Exact match “Adecco Medical est le leader des solutions emploi des professionnels de la santé : Infirmier, IADE, IBODE, aide-soignant, Kinésithérapeute, Pharmacien, Ergothérapeute, Médecin, ….” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17	Veeda Lifesciences	Exact match	Ahmedabad, IndiaHQ recorded Sep 27, 2026	501-1,000	1,320 contacts →
	Exact match “We partner with innovator and generic companies using our high-quality infrastructure and a global network of clinical trial sites, to launch novel therapies and new products for…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	Lambda Therapeutic Research	Exact match	Ahmedabad, IndiaHQ recorded Sep 27, 2026	1,001-5,000	1,235 contacts →
	Exact match “Lambda Therapeutic Research is a leading full-service Global Clinical Research Organization (CRO) headquartered in Ahmedabad (India), with facilities and operations in Mehsana…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19	Perceptive INC	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	1,197 contacts →
	Exact match “Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	locumtenens.com	Exact match	Alpharetta, GA, United StatesHQ recorded Sep 27, 2026	501-1,000	1,171 contacts →
	Exact match “LocumTenens.com specializes in optimizing healthcare staffing operations.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21	Totalmed	Exact match	Appleton, WI, United StatesHQ recorded Sep 27, 2026	201-500	1,170 contacts →
	Exact match “TotalMed provides temporary, contract, and full time staffing services to hospitals, medical groups, health plans, and life sciences companies who require staffing assistance in…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	Planet Pharma	Exact match	Raleigh, NC, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,088 contacts →
	Exact match “Founded in 2012, Planet Pharma is a global leader in life sciences recruitment and staffing, specializing in Pharmaceuticals, Biotechnology, Medical Device, Labs & Healthcare…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23	CTI Clinical Trial And Consulting Services	Exact match	Covington, KY, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,043 contacts →
	Exact match “CTI Clinical Trial and Consulting Services is a global, privately held, research service organization, delivering a complete spectrum of clinical trial and consulting services…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24	Navitas Life Sciences	Exact match	Gaithersburg, MD, United StatesHQ recorded Sep 27, 2026	1,001-5,000	990 contacts →
	Exact match “Navitas Life Sciences is a global Clinical Research partner with over 35 years of expertise in Clinical, Regulatory, Safety, and Data Management solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25	Velocity Clinical Research, INC	Exact match	Durham, NC, United StatesHQ recorded Sep 27, 2026	1,001-5,000	971 contacts →
	Exact match “Velocity is the world’s leading organization of fully integrated clinical research sites.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “clinical research staffing agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 7,208 clinical research staffing agencies worldwide

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Clinical research staffing agencies worldwide at a glance

As of Sep 27, 2026

35.6%Verified-email coverage

37.5Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

3,206

11-50

2,219

51-200

1,146

201-500

345

501-1,000

137

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for clinical research staffing agencies are linked below.
What qualifies: Company records worldwide whose business descriptions match “clinical research staffing agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 96,358 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Clinical research staffing agencies by location

40 lists · largest first

Every Clinical research staffing agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “clinical research staffing agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clinical research staffing agencies are there worldwide?

RevenueBase identified 7,208 company matches for clinical research staffing agencies worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Icon PLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most clinical research staffing agencies?

The United States leads with 2,968 companies, followed by the United Kingdom (627) and India (434). Every clinical research staffing agencies list by country and city is linked on this page.

Which city has the most clinical research staffing agencies?

London leads with 206 company records, followed by New York (98) and Miami (65).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 96,358 professional contacts with verified work emails tracked across these 7,208 companies; direct dials are available where recorded.

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 SmartSearch, 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.