Insights

Strong Regional Presence Callos Resource has expanded its operations to 21 offices across Ohio, Pennsylvania, Kansas, Kentucky, and Maryland, indicating a well-established regional footprint that can be leveraged to serve diverse industry sectors and attract clients seeking local staffing solutions.

Diverse Industry Expertise The company caters to a broad spectrum of industries including manufacturing, engineering, retail, medical, and warehousing, creating opportunities to cross-sell specialized staffing services tailored to different market needs.

Established Client Base Serving both Fortune 500 companies and small to medium enterprises suggests potential for expanding into new industries and upselling premium staffing solutions to existing clients, especially those with ongoing or expanding workforce needs.

Investment Activity Callos recently invested in assets like Mac's Diner property, indicating financial stability and willingness to diversify assets, which can be a foundation for introducing complementary business services or expanding current staffing offerings.

Market Revenue Bracket With revenues estimated between 100 million and 250 million dollars and a sizable employee network, there are opportunities to leverage their financial capacity for targeted outreach to larger organizations seeking comprehensive staffing partnerships.

Callos Resource Tech Stack

Callos Resource uses 8 technology products and services including WordPress, MySQL, Twemoji, and more. Explore Callos Resource's tech stack below.

  • WordPress
    Content Management System
  • MySQL
    Database
  • Twemoji
    Font Scripts
  • jQuery Migrate
    Javascript Libraries
  • jQuery
    Javascript Libraries
  • jQuery Mobile
    Mobile Frameworks
  • Google Analytics
    Web Analytics
  • Apache
    Web Servers

Callos Resource's Email Address Formats

Callos Resource uses at least 1 format(s):
Callos Resource Email FormatsExamplePercentage
FLast@callos.comJDoe@callos.com
63%
First@callos.comJohn@callos.com
23%
Last@callos.comDoe@callos.com
14%

Frequently Asked Questions

Where is Callos Resource's headquarters located?

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Callos Resource's main headquarters is located at Youngstown, Ohio 44512 United States. The company has employees across 1 continents, including North America.

What is Callos Resource's phone number?

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You can contact Callos Resource's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Callos Resource's official website and social media links?

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Callos Resource's official website is callos.com and has social profiles on LinkedIn.

How much revenue does Callos Resource generate?

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As of April 2026, Callos Resource's annual revenue is estimated to be $21M.

What is Callos Resource's SIC code NAICS code?

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Callos Resource's SIC code is 7363 - Help Supply Services NAICS code is 5613 - Employment Services.

How many employees does Callos Resource have currently?

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As of April 2026, Callos Resource has approximately 165 employees across 1 continents, including North America. Key team members include Physician, President: A. N.Onsite Manager: B. L.Business Development Manager: D. V.. Explore Callos Resource's employee directory with LeadIQ.

What industry does Callos Resource belong to?

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Callos Resource operates in the Staffing and Recruiting industry.

What technology does Callos Resource use?

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Callos Resource's tech stack includes WordPressMySQLTwemojijQuery MigratejQueryjQuery MobileGoogle AnalyticsApache.

What is Callos Resource's email format?

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Callos Resource's email format typically follows the pattern of FLast@callos.com. Find more Callos Resource email formats with LeadIQ.

When was Callos Resource founded?

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Callos Resource was founded in 1965.

Callos Resource

Staffing and RecruitingOhio, United States51-200 Employees

Established in 1965 by the late John Callos, Callos Resource has grown from one office in Youngstown, Ohio to 21 offices scattered throughout Ohio, Pennsylvania, Kansas, Kentucky and Maryland.  Callos provides a broad range of human resource services to a variety of businesses which include Temporary Services, Direct Hire Services, Payroll Services, and Medical/Nursing Services.  We do business with Fortune 500 companies as well as small and medium sized firms in the Manufacturing, Engineering, Retail, Medical and Warehouse industries. Our results-oriented professionals build strong partnerships with clients to ensure continuity between their corporate culture and our personnel services.

Experienced, educated and certified in a variety of disciplines, Callos Resource employs a team of committed Human Resource professionals. Valuing honesty, integrity and creativity, the management and staff of Callos Resource are dedicated to providing an unparalleled quality of service to their customers and their candidates.

Section iconCompany Overview

Headquarters
Youngstown, Ohio 44512 United States
Phone number
Website
callos.com
SIC Code
7363 - Help Supply Services
NAICS Code
5613 - Employment Services
Founded
1965
Employees
51-200

Section iconFunding & Financials

  • $100M$250M

    Callos Resource's revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $100M$250M

    Callos Resource's revenue is estimated to be in the range of $100M$250M

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