Company lists · Data refreshed September 2026

Top 25 Process engineering staffing firms based in Chicago, United States

Name: Process engineering staffing firms based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 93 companies tracked

RevenueBase identified 93 company matches for process engineering staffing firms associated with Chicago, United States as of September 2026 and tracks 7,460 professional contacts across them, including 1,494 with verified work emails. Across the United States, Houston is the largest hub for this category (245 companies); Chicago has 93.

This list covers company matches for process engineering staffing firms associated with Chicago, 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 29, 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 29, 2026 How this list was built

93Companies

7,460Contacts tracked

1,494Verified emails

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The 25 largest process engineering staffing firms based in Chicago, United States

Ranked by team size

Top 25 of 93 company matches for process engineering staffing firms based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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	Addison Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,840 contacts →
	Exact match “Addison Group provides comprehensive talent solutions and consulting services across diverse practice areas, including Non-Clinical Healthcare, Information Technology (IT), Human…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	MEDIX	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	501-1,000	1,753 contacts →
	Exact match “Medix provides workforce solutions to clients and creates opportunity for talent in the Healthcare, Life Sciences, Engineering and Technology fields.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Elite Staffing INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	10001+	1,661 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Lasalle Network	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	201-500	605 contacts →
	Exact match “Keeping business transformations on track is essential to maintaining market advantage.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Connect Search, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	310 contacts →
	Exact match “Connect Search, LLC is a boutique staffing firm founded by a group of partners who share the same vision and are all recruiters at heart.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Crystal Equation Corporation	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	201-500	262 contacts →
	Exact match “Crystal Equation (CE) is a certified Women-Owned Business that empowers people and advances technology initiatives by building trust.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Hirewell	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	134 contacts →
	Exact match “Hirewell is a global talent solutions provider that combines domain expert recruiters with modern hiring strategy to deliver people who make a difference.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	MMD Services	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	n/a	104 contacts →
	Exact match “MMD Services Inc.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Gforce Life Sciences	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	100 contacts →
	Exact match “Multi-Year Award Winner Inc.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	North Bridge Staffing Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	37 contacts →
	Exact match “North Bridge Staffing was established in 2002 by Gerrie and Pat Dugan, who believed there was a need to provide customized talent solutions to clients, associates, and candidates.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	ARETÊ	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	201-500	31 contacts →
	Exact match “What We Do: Arete is a direct hiring partner for several of the Nation's Largest Employers!” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	The Sterling Choice	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	11-50	29 contacts →
	Exact match “Recruitment that challenges the norm - and delivers results.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Primary Staffing	Exact match	Chicago, United StatesHQ recorded Sep 29, 2026	51-200	29 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	M-Works Search	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1-10	26 contacts →
	Exact match “At M-Works Search our goal is simple.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Compucore Solutions INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	21 contacts →
	Exact match “CompuCore is a leading staffing, recruitment and consulting firm focused on Information Technological and Non Information Technological industries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Cullerton Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	11-50	16 contacts →
	Exact match “Cullerton Group is a staffing firm specialized in the placement of IT and Engineering candidates.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Away Staffing Services, INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	16 contacts →
	Exact match “We are a rapidly growing staffing agency that specializes in placing workers in permanent skilled and unskilled manufacturing positions and office/clerical positions in the…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Kappa Search Inc. KSI	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	11-50	14 contacts →
	Exact match “At Kappa Search, we believe in the power of people.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Solve IT Strategies, INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1-10	13 contacts →
	Exact match “Call us 312-870-0365!” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	IFG US	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	11-50	12 contacts →
	Exact match “With over 15 years of expertise in human capital solutions, IFG US partners with Fortune 500 companies and fast-growing startups nationwide to turn staffing challenges into…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Anchor Staffing, INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	51-200	12 contacts →
	Exact match “We combine experience and best practices to deliver innovative solutions while keeping the focus on you, the customer.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Loftus & O'meara Search	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1-10	12 contacts →
	Exact match “Loftus & O’Meara has been partnering with Chicago businesses for over 30 years.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Pinpoint Pharma, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	11-50	12 contacts →
	Exact match “Pinpoint Pharma, LLC specializes in placing scientifically experienced candidates in positions within the pharmaceutical, medical device, chemical, and food industries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Clark Resources	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1-10	9 contacts →
	Exact match “Clark Resources is a specialized Manufacturing Recruiting Firm dedicated to connecting top talent with leading companies across the nation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	RTR HR And Staffing Services, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1-10	8 contacts →
	Exact match “RTR HR and Staffing Services, LLC connects clients to a strong HR and Staffing team.” Recorded in the RevenueBase company graph · Sep 29, 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 “process engineering 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 93 process engineering staffing firms based in Chicago, United States

See the full list, filter by size, metro and specialty, and access 1,494 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Process engineering staffing firms based in Chicago, United States at a glance

As of Sep 29, 2026

20.0%Verified-email coverage

80.2Average contacts per company

11-50Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 93 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 Chicago, United States whose business descriptions match “process engineering 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 1,494 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 29, 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.

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

How many process engineering staffing firms are there based in Chicago, United States?

RevenueBase identified 93 company matches for process engineering staffing firms associated with Chicago, 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?

Addison Group 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 process engineering staffing firms?

Houston leads the United States with 245 company records, followed by New York (151) and Atlanta (118). Chicago has 93.

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 1,494 professional contacts with verified work emails tracked across these 93 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 29, 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.