Insights

Strong Market Presence Callos Resource has established a broad geographic footprint with 21 offices across Ohio, Pennsylvania, Kansas, Kentucky, and Maryland, indicating extensive regional coverage and potential access to diverse local markets for staffing services.

Diverse Client Base The company serves a mix of Fortune 500 firms and small to medium-sized businesses across manufacturing, engineering, retail, medical, and warehouse sectors, presenting multiple cross-industry opportunities for tailored staffing solutions.

Revenue Growth Potential With an estimated revenue ranging between 100 million and 250 million dollars, Callos Resource demonstrates significant financial stability and growth potential, making it an attractive prospect for partners seeking established staffing providers.

Expansion Activities Recent property investments, such as acquiring Mac's Diner in April 2022, suggest active expansion and asset diversification, which may open up opportunities for facility-related staffing or local service partnerships.

Technology Utilization Using a modern tech stack including WordPress, Google Analytics, and common web development tools indicates a focus on digital engagement and data-driven decision making, offering avenues for integrated recruitment marketing or client portals.

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 5083 Market Street, Corporate Center Building Youngstown, OH 44512, US. 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 October 2025, Callos Resource's annual revenue is estimated to be $21M.

What is Callos Resource's NAICS code?

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Callos Resource's NAICS code is 5613 - Employment Services.

How many employees does Callos Resource have currently?

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As of October 2025, Callos Resource has approximately 167 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 RecruitingUnited 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
5083 Market Street, Corporate Center Building Youngstown, OH 44512, US
Phone number
Website
callos.com
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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