Based in Bradenton, Florida, Nelco is one of the oldest professional employer organizations in the country. The company, which provides payroll, benefits, workers’ compensation, and online technology products and services, was founded 24 years ago by Virginia (“Ginny”) Dorris. Prior to being purchased by CoAdvantage, Nelco was one of the top 25 PEOs in the country, the 68th largest privately held business in Florida and on the Florida 200 list.