The National Association of Professional Employer Organizations (NAPEO) is The Voice of the PEO Industry. NAPEO has some 250 PEO members that provide payroll, benefits, and other HR services to between 175,000 businesses employing 3.7 million people. An additional 200 companies that provide services to PEOs are associate members of NAPEO. NAPEO provides a comprehensive suite of benefits for full time employees including health, dental, vision, 401k, flex spending, generous PTO, free parking, and more. EOE.