Company lists · Data refreshed September 2026

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

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 122 companies tracked

RevenueBase identified 122 company matches for drug development staffing firms associated with Houston, United States as of September 2026 and tracks 2,563 professional contacts across them, including 412 with verified work emails. Across the United States, New York is the largest hub for this category (244 companies); Houston has 122.

This list covers company matches for drug development staffing firms associated with Houston, United States, 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 28, 2026.

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 28, 2026 How this list was built

122Companies

2,563Contacts tracked

412Verified emails

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

Ranked by team size

Top 25 of 122 company matches for drug development staffing firms based in Houston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	DM Clinical Research	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	590 contacts →
	Exact match “DM Clinical Research is a network of clinical trial investigator sites with headquarters based out of Houston, Texas.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Pharm-Olam, LLC	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	561 contacts →
	Exact match “Pharm-Olam is now Allucent.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Core Group Resources	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	176 contacts →
	Exact match “Core Group Resources connects businesses in various industries and helps them find the right personnel.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Richard, Wayne & Roberts	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	134 contacts →
	Exact match “When Richard, Wayne & Roberts began in 1978, our goal was to operate on a level of professionalism commensurate with that of the companies we serve.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Taylor Smith Consulting, LLC	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	81 contacts →
	Exact match “Taylor Smith Consulting is a leading technical, service, and staff resource provider.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Beaconbold	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	77 contacts →
	Exact match “At BeaconBold, we specialize in connecting top-tier talent with leading organizations across the United States.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Packgene Biotech, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	201-500	59 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Pulse Staffing	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	201-500	57 contacts →
	Exact match “Pulse Staffing is a leading provider of medical and administrative personnel.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Prohealth Staffing	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	48 contacts →
	Exact match “At ProHealth Staffing, we turn connections into opportunities!” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Proxima CRO	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	45 contacts →
	Exact match “Proxima CRO works with the new class of rising stars in drugs, devices, diagnostics and digital therapeutics.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Global Force USA	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	201-500	35 contacts →
	Exact match “Global Force USA specializes in Healthcare, Administrative, Call Center, IT and professional staffing services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Labtopia, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	27 contacts →
	Exact match “Labtopia is a technical services company providing staffing, consulting, training and informatics.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	CEBIS	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	26 contacts →
	Exact match “CEBIS, a full-service CRO headquartered in Houston, Texas, will provide a comprehensive integrated solution for clinical research (including start-up to CSR, phase I to IV)…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Expert Staffing Company	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	25 contacts →
	Exact match “Since our founding in 1992, Expert Staffing has been committed to helping local employers find the people they need, when they need them.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Search Services	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	23 contacts →
	Exact match “Through its four divisions: Search Finance, Search Technology, Search Support, and Search AI, Search Services is firmly established as the premier recruiting and staffing agency…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	KS Staffing Group	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	20 contacts →
	Exact match “The ability to attract and retain great talent is critical in today's business world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Extreme Technologies, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	20 contacts →
	Exact match “Extreme Technologies, Inc.(ETI) began our success in the Houston market in 1998.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Hiring Source	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	1-10	20 contacts →
	Exact match “The right people make all the difference.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Contemporary Recruiting	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	19 contacts →
	Exact match “We are a recruiting firm specialized in delivering best-fit job placements by spending in depth one-on-one time with each candidate to ensure their success as well as providing…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Blue Space Healthcare	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	18 contacts →
	Exact match “At Blue Space Healthcare, a trusted staffing agency, we're committed to excellence in nursing.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Element Staffing Services	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	14 contacts →
	Exact match “Element Staffing Services is an industry-leading, scientific and technical staffing company, offering contract, contract to hire, direct placement, and payroll services to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	JBC Manpower	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	201-500	13 contacts →
	Exact match “JBC Manpower, where we redefine workforce solutions to drive your business forward.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Quest Personnel Resources	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	12 contacts →
	Exact match “Quest Personnel Resources, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	HGI Clinical	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	11-50	11 contacts →
	Exact match “HGI Clinical is a relationship focused CRO with not only a wide range of therapeutic experience, but also experience with investigational product types, study designs and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	S&s Professional Services LP	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	51-200	11 contacts →
	Exact match “We have built our company on providing professional and efficient staffing solutions.” Recorded in the RevenueBase company graph · Sep 28, 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 “drug development staffing firms”. 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 122 drug development staffing firms based in Houston, United States

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

As of Sep 28, 2026

16.1%Verified-email coverage

21.0Average 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

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 122 companies.

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.
What qualifies: Company records associated with Houston, United States whose business descriptions match “drug development staffing firms” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 412 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 28, 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.

Drug development staffing firms by metro in the United States

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 “drug development staffing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many drug development staffing firms are there based in Houston, United States?

RevenueBase identified 122 company matches for drug development staffing firms associated with Houston, United States 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?

DM Clinical Research tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

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

New York leads the United States with 244 company records, followed by Boston (138) and San Diego (135). Houston has 122.

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 412 professional contacts with verified work emails tracked across these 122 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 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 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.