Company lists · Data refreshed September 2026

Top 13 Staff augmentation firms based in Seattle, United States

Name: Staff augmentation firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 25 companies tracked

RevenueBase identified 25 company matches for staff augmentation firms associated with Seattle, United States as of September 2026 and tracks 1,554 professional contacts across them, including 262 with verified work emails. Across the United States, New York is the largest hub for this category (246 companies); Seattle has 25.

This list covers company matches for staff augmentation firms associated with Seattle, 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 22, 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 22, 2026 How this list was built

25Companies

1,554Contacts tracked

262Verified emails

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The 13 largest staff augmentation firms based in Seattle, United States

Ranked by team size

Top 13 of 25 company matches for staff augmentation firms based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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	RO Health	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	201-500	1,067 contacts →
	Exact match “Ro Health is a rapidly growing healthcare staffing agency with over a decade of experience aligning compassionate and talented providers with incredible career opportunities.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2	Jeffreym Consulting	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	201-500	187 contacts →
	Exact match “Founded in 2006, JeffreyM is a trusted staffing supplier solving contingent workforce challenges for small, medium, and fortune 500 companies like Meta, Dropbox, and Microsoft.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3	Rylem Staffing	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	51-200	74 contacts →
	Exact match “Since 2007, Rylem Staffing has partnered with organizations to solve one of the most important challenges in business: finding the right people.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4	Harvard Partners Health Nurseboard	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	501-1,000	44 contacts →
	Exact match “Harvard Partners Health is a premier healthcare staffing agency dedicated to a single mission: empowering healthcare facilities with reliable, high-quality clinicians to improve…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5	Molly Brown Temps	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	n/a	31 contacts →
	Exact match “Offering temporary, temp-to-hire, and direct hire services for candidates and companies in the Greater Seattle area.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6	Redcley Partners	Exact match	Seattle, United StatesHQ recorded Sep 22, 2026	51-200	29 contacts →
	Exact match “We partner with our Clients to support them across their business with staffing and consulting services, full-time employees, and project based solutions.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	Ontarget Staffing INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	1-10	22 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8	C9 Staff	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	51-200	16 contacts →
	Exact match “Book a FREE consultation today: https://bit.ly/C9FreeConsultation C9 Staff is your growth partner in expanding your agency’s staff capabilities.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	Express Employment Professionals Seattle, WA	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	1-10	12 contacts →
	Exact match “Welcome to Express Seattle!” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10	Eworld Solutions	Exact match	Seattle, United StatesHQ recorded Sep 22, 2026	11-50	8 contacts →
	Exact match “Eworld Solutions specializes in providing companies with expert engineers for design and verification.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	Lincoln BAY	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	51-200	5 contacts →
	Exact match “Lincoln Bay is a Seattle based professional staffing company that specializes in contract and permanent placement of Informational Technology Professionals.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12	Insight Placement Solutions	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	1-10	1 contacts →
	Exact match “We have a team with over 10 years in the talent placement industry experienced in providing top shelf consultant resources,solving your most challenging business problems.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13	Velling-&-Associates	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	1-10	1 contacts →
	Exact match “Velling & Associates is a boutique staffing firm that understands the demands of the Seattle/Bellevue marketplace.” Recorded in the RevenueBase company graph · Sep 22, 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 “staff augmentation 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 13 of 25 staff augmentation firms based in Seattle, United States

See the full list, filter by size, metro and specialty, and access 262 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Staff augmentation firms based in Seattle, United States at a glance

As of Sep 22, 2026

16.9%Verified-email coverage

62.2Average contacts per company

11-50Median size (employees)

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 25 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 Seattle, United States whose business descriptions match “staff augmentation 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 262 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 22, 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.

Staff augmentation 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 “staff augmentation firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many staff augmentation firms are there based in Seattle, United States?

RevenueBase identified 25 company matches for staff augmentation firms associated with Seattle, 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?

RO Health 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 staff augmentation firms?

New York leads the United States with 246 company records, followed by Houston (224) and Atlanta (154). Seattle has 25.

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 262 professional contacts with verified work emails tracked across these 25 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 22, 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.