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  • Partner Since
  • 1988
  • Location
  • Dallas, TX, USA


Hundreds of businesses trust Staff One for HR solutions. Since 1988, our company has been a leader in PEO and PI services in the southwest.

Staff One HR supports and develops our clients’ employees. Our company is a Professional Employer Organization (PEO) and is a Predictive Index Partner in Texas, Arkansas and Oklahoma.

Staff One HR's headquarters are in Dallas, and we have branches in Oklahoma City, Denver, and Johnson City, Tennessee. Our team deploys Predictive Index as a catalyst for employee measurement, promotion and assessment. We teach human resource departments and executive leadership how to build, grow and improve through the Predictive Index. Give us a call to meet with our team and discuss your custom PI plan and outcomes.

Mark Sinatra

Mark Sinatra

Mark Sinatra is the CEO of Staff One HR. Before joining Staff One HR, Mark co-founded Gordian Capital, a private investment company that focuses on making long-term investments in lower middle market companies. He has worked in the private equity, investment banking, consulting, and business process outsourcing industries for the following companies: Credit Suisse, Merrill Lynch, Andersen and RR Donnelley

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