Company lists · Data refreshed September 2026

Top 25 Drug development staffing firms based in Philadelphia, United States

Name: Drug development staffing firms based in Philadelphia, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 65 companies tracked

RevenueBase identified 65 drug development staffing firms headquartered in Philadelphia, United States as of September 2026 and tracks 5,288 professional contacts across them, including 2,371 with verified work emails. Across the United States, New York is the largest hub for this category (229 companies); Philadelphia has 65.

This list covers drug development staffing firms headquartered in Philadelphia, 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

65Companies

5,288Contacts tracked

2,371Verified emails

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The 25 largest drug development staffing firms based in Philadelphia, United States

Ranked by team size

Top 25 of 65 drug development staffing firms based in Philadelphia, 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	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
2	Adare Pharma Solutions	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	501-1,000	487 contacts →
	Partial evidence “Adare Pharma Solutions is a global technology-driven CDMO providing end-to-end integrated services, from product development through commercial manufacturing and packaging, with…” Source: RevenueBase Database · checked Sep 28, 2026
3	Missionstaff	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	201-500	88 contacts →
	Indirect evidence “MissionStaff® specializes in delivering top-tier talent in Technology, Creative, and Marketing, as well as the Business Services that support these teams.” Source: RevenueBase Database · checked Sep 28, 2026
4	Philly Temps & Perm	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	43 contacts →
	Indirect evidence “Through the last 20 years Philly Temps & Perm continues to be committed to maintaining a diverse base of on-demand candidates ready to meet the requirements of our customers.” Source: RevenueBase Database · checked Sep 28, 2026
5	Redox Scientific	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	51-200	30 contacts →
	Indirect evidence “Redox Scientific is a contract research organization located in the prevailing pharmaceutical hub of India, Gujarat.” Source: RevenueBase Database · checked Sep 28, 2026
6	Facet Life Sciences	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “Facet Life Sciences is a trusted, award-winning regulatory affairs and product development consulting firm, purpose-built for small life science companies.” Source: RevenueBase Database · checked Sep 28, 2026
7	Allnessjobs	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “We are skilled career agents who connect exceptional talent with some of the most prestigious employers in the country.” Source: RevenueBase Database · checked Sep 28, 2026
8	Kensington Management Services, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	201-500	22 contacts →
	Indirect evidence “At KMS, we match qualified career seekers and great companies together, to ensure individuals in need get the care they deserve.” Source: RevenueBase Database · checked Sep 28, 2026
9	Mirador Global LLC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “Mirador Global is a consulting firm providing drug commercialization assessment and launch planning services in Oncology, Immuno-Oncology, Orphan and CNS/Pain/Addiction for small…” Source: RevenueBase Database · checked Sep 28, 2026
10	Connexus Technology, LLC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Connexus Technology is a leader in Staff Augmentation and Digital Transformation with a strong focus on the life sciences industry.” Source: RevenueBase Database · checked Sep 28, 2026
11	GTS Scientific	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “GTS is a full life cycle recruitment and human capital services firm specializing in the Life Sciences, Engineering and Specialty Manufacturing industries.” Source: RevenueBase Database · checked Sep 28, 2026
12	The Perillo Group	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	9 contacts →
	Indirect evidence “Full service recruiting company based out of the Philadelphia, Pennsylvania area.” Source: RevenueBase Database · checked Sep 28, 2026
13	Dubu Research	Indirect evidence	Philadelphia, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “DuBu Research (“DuBu”) is a biometrics-focused contract research organization (CRO) providing a range of expertise-based statistical services to biotech companies.” Source: RevenueBase Database · checked Sep 28, 2026
14	Intuitive Search Partners	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Indirect evidence “At ISP, we specialize in placing Physicians and Advanced Practice Providers through both contingency and locums models, guided by a long-term partnership mindset.” Source: RevenueBase Database · checked Sep 28, 2026
15	Fawkes IDM	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Fawkes IDM (Individual Development & Management) helps clients find, qualify, and hire individuals with deep technical capabilities.” Source: RevenueBase Database · checked Sep 28, 2026
16	Mercury Group Staffing & Placement Services	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Mercury Group Staffing and Placement Services is dedicated to providing outstanding services by hiring highly skilled and reliable professionals who are committed to providing…” Source: RevenueBase Database · checked Sep 28, 2026
17	Oncospire Consultants LLC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “We help small biotech teams restore control over outsourced clinical programs so lead assets move faster, safer, and with investor confidence.” Source: RevenueBase Database · checked Sep 28, 2026
18	James Grey International	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “James Grey International is an uncommon search firm dedicated to engaging and delivering exceptional talent specific to the Life Sciences.” Source: RevenueBase Database · checked Sep 28, 2026
19	Unlimited Staffing Agency LLC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Partial evidence “At Unlimited Staffing Agency our vision is to provide workforce solutions for hospitals, medical centers, outpatient centers, home health organizations and other healthcare…” Source: RevenueBase Database · checked Sep 28, 2026
20	Junto HLS	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Junto HLS focuses exclusively on Life Sciences recruiting.” Source: RevenueBase Database · checked Sep 28, 2026
21	Launch Excellence Partners LLC	Indirect evidence	Philadelphia, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Bringing innovation to patients is no small task, a journey with many challenges, at a hefty price tag.” Source: RevenueBase Database · checked Sep 28, 2026
22	NEW River Search LLC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “We work with Pharma and Biotech organizations on CMC / Technical Operations leadership.” Source: RevenueBase Database · checked Sep 28, 2026
23	Adaptive Health Sciences	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Adaptive Health Sciences is a life sciences consulting firm focusing on the delivery of regulatory affairs, quality assurance, and compliance solutions to improve patient outcomes…” Source: RevenueBase Database · checked Sep 28, 2026
24	Brady Talent Solutions	Indirect evidence	Philadelphia, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Brady Talent Solutions is a privately owned recruitment solutions provider.” Source: RevenueBase Database · checked Sep 28, 2026
25	Richardson Search Company	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Richardson Search is a full service recruiting firm.” 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 65 drug development staffing firms based in Philadelphia, United States

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Drug development staffing firms based in Philadelphia, United States at a glance

As of Sep 28, 2026

44.8%Verified-email coverage

81.4Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for Philadelphia, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 65 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 Philadelphia, 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 Philadelphia 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, 2,371 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 in the United States

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 Philadelphia, United States?

RevenueBase identified 65 drug development staffing firms headquartered in Philadelphia, 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?

PCI Pharma Services, headquartered in Philadelphia, tops this list with the largest team on record.

Which city in the United States has the most drug development staffing firms?

New York leads the United States with 229 headquartered companies, followed by Boston (138) and San Diego (135). Philadelphia has 65.

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 2,371 verified decision-maker contacts tracked across these 65 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.