Company lists · Data refreshed September 2026

Top 25 Greenhouse staffing companies based in the United States

RevenueBase identified 219 greenhouse staffing companies headquartered in the United States as of September 2026 and tracks 3,950 professional contacts across them, including 691 with verified work emails. Las Vegas is the largest hub.

This list covers greenhouse staffing companies 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
219Companies
3,950Contacts tracked
691Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest greenhouse staffing companies based in the United States

Ranked by team size
Top 25 of 219 greenhouse staffing companies 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 greenhouse staffing companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceGoose Creek, SC, United StatesHQ checked Sep 28, 2026n/a732 contacts →

Partial evidence

“Trojan Labor Specializes in matching Customers who have industrial and Light Industrial staffing needs while never forgetting who the CUSTOMER is.”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceAtlanta, GA, United StatesHQ checked Sep 28, 20265,001-10,000656 contacts →

Partial evidence

“Today, Hospitality Staffing Solutions is recognized as the industry leader.”

Source: RevenueBase Database · checked Sep 28, 2026
3Partial evidenceNeedham, MA, United StatesHQ checked Sep 28, 2026n/a187 contacts →

Partial evidence

“Resource Options Inc.(ROI) provides custom staffing solutions to the design, construction, environmental, & emergency response industries.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceReno, NV, United StatesHQ checked Sep 28, 20261,001-5,000138 contacts →

Indirect evidence

“KNA Solutions specializes in high-volume hiring in the Light Industrial space across all markets of the US.”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidencePleasanton, CA, United StatesHQ checked Sep 28, 2026201-500122 contacts →

Partial evidence

“SOLID Personnel, Inc-"Expertise to Get Things Done" SOLID Personnel is a nationwide specialized recruiting & staffing firm.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceRuskin, FL, United StatesHQ checked Sep 28, 202651-20092 contacts →

Indirect evidence

“At Speedling we are motivated by our customers’ success.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceDetroit, MI, United StatesHQ checked Sep 28, 202651-20061 contacts →

Indirect evidence

“SMS Group of Companies thrives to not only meet, but surpass customer expectations through exceptional service.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceLambertville, MI, United StatesHQ checked Sep 28, 202611-5048 contacts →

Indirect evidence

“We are fueling the success of agriculture by elevating talent across the industry.”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceCardiff-by-the-sea, CA, United StatesHQ checked Sep 28, 202611-5045 contacts →

Partial evidence

“We are a vertically-integrated, cannabis-focused executive search and staffing firm dedicated to recruiting only the best-fit cannabis industry talent for your company.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceReno, NV, United StatesHQ checked Sep 28, 2026201-50044 contacts →

Indirect evidence

“Geotemps, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceWest Palm Beach, FL, United StatesHQ checked Sep 28, 202611-5040 contacts →

Indirect evidence

“Barnett Management is a National based provider of innovative workforce solutions with Florida offices in Stuart, West Palm Beach, Lake Worth, and Tampa.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceVineland, NJ, United StatesHQ checked Sep 28, 20261,001-5,00036 contacts →

Partial evidence

“Your Premier Staffing Partner for Light Industrial and Manufacturing Companies.”

Source: RevenueBase Database · checked Sep 28, 2026
13Partial evidenceAuburn Hills, MI, United StatesHQ checked Sep 28, 202651-20033 contacts →

Partial evidence

“United Green is a full-service staffing company, specializing in cannabis.”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceFox Field, CO, United StatesHQ checked Sep 28, 2026201-50033 contacts →

Partial evidence

“Hemp Temps is a full service staffing agency specific to the marijuana industry that partners with labs and manufacturing facilities to meet harvest & sales deadlines and more.”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceMiddlesex, United StatesHQ checked Sep 28, 202611-5031 contacts →

Indirect evidence

“PGSD Limited is an experienced commercial horticulture contractor, with contracts spanning from a few thousand pounds to those in excess of We have the depth of knowledge and the…”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceChicago, IL, United StatesHQ checked Sep 28, 2026201-50031 contacts →

Indirect evidence

“What We Do: Arete is a direct hiring partner for several of the Nation's Largest Employers!”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceMarietta, GA, United StatesHQ checked Sep 28, 202611-5031 contacts →

Partial evidence

“At ProForce Staffing we have over 30yrs in personnel recruiting and staffing.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceCharlotte, NC, United StatesHQ checked Sep 28, 202611-5031 contacts →

Indirect evidence

“Temporary Work and Full-time Safety is our Job!”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceWoburn, MA, United StatesHQ checked Sep 28, 2026501-1,00029 contacts →

Indirect evidence

“JobleticsPro has Food Service, Hospitality, and Environmental Service staff available at a moments notice.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceSioux Falls, SD, United StatesHQ checked Sep 28, 202651-20028 contacts →

Indirect evidence

“What started as a destination Garden Center in the vast rural environment just outside of Sioux Falls city limits, Landscape Garden Centers has blossomed into the region's premier…”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceCouncil Bluffs, IA, United StatesHQ checked Sep 28, 202611-5027 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceIrvington, AL, United StatesHQ checked Sep 28, 20261-1027 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
23Partial evidenceAlvin, TX, United StatesHQ checked Sep 28, 2026201-50026 contacts →

Partial evidence

“Greyco is not a traditional staffing company-unlike others, we are the only company that provides personnel through our exclusive in-house team of known employees, all seasoned…”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceMebane, NC, United StatesHQ checked Sep 28, 202611-5024 contacts →

Indirect evidence

“We specialize in People.our slogan is "We find great people!" Our experienced staff comes from the industry and understands its technologies, markets and issues.”

Source: RevenueBase Database · checked Sep 28, 2026
25Partial evidenceStrongsville, OH, United StatesHQ checked Sep 28, 202651-20023 contacts →

Partial evidence

“LLK Greenhouse Solutions is a national greenhouse solution provider that has serviced the greenhouse and indoor growing industry for 90+ years.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 219 greenhouse staffing companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 691 reachable decision-makers.

Free signup · no credit card

View the full list →

Greenhouse staffing companies based in the United States at a glance

As of Sep 28, 2026
17.5%Verified-email coverage
18.0Average contacts per company
11-50Median size (employees)
2.3%Largest-city concentration · Las Vegas
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
96
11-50
63
51-200
30
201-500
15
501-1,000
7
1,001-5,000
6
5,001-10,000
1
10001+
1

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 219 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 greenhouse staffing companies, 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 “greenhouse staffing companies”. 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 greenhouse staffing companies), 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 greenhouse staffing companies, 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, 691 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.

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 greenhouse staffing companies, 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 greenhouse staffing companies are there based in the United States?

RevenueBase identified 219 greenhouse staffing companies 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?

Trojan Labor, headquartered in Goose Creek, tops this list with the largest team on record.

Which city has the most greenhouse staffing companies?

Las Vegas leads with 5 headquartered companies, followed by Nashville (5) and Cincinnati (4).

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 691 verified decision-maker contacts tracked across these 219 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.

Ready to reach these companies? Verified emails and direct dials for all 219 greenhouse staffing companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

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.