To embed, copy and paste the code into your website or blog: Professional employer organizations provide human resources solutions for small and mid-size businesses. In the US, PEOs serve more than 175,000 small and mid-sized businesses, which represents 15% of all US employers with 10 to 99 employees, according to the National Association of Professional Employer Organizations. In addition to handling human resources matters, payroll and employee benefits, some PEOs offer employment practices liability insurance – which provides their business clients with liability and defense coverage for claims brought by employees for “wrongful employment acts,” such as wrongful termination, harassment, retaliation, discrimination and other workplace torts.