All data points are estimates provided by the Clutch team.
All data points are estimates provided by the Clutch team. Each data point can change at any time and is subject to the company’s discretion once they claim ownership over their Clutch profile.
Work at this company?Claim Profile
Staffing and Recruiting Services
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.