The Sullivan Group HR, Finds, Pays, and Protects Employees and Businesses. We are a Human Resources Outsourcing firm based in Savannah Georgia. We partner with clients in Georgia, South Carolina . The Sullivan Group HR also includes Sullivan's Staffing a full service staffing service. Sullivan's Staffing Service was recently voted the best in Savannah. Our PEO (Professional Employer Organization) offers workers comp insurance, employee benefits, compliance services and payroll services. The Sullivan Group also has a full service commercial insurance company, Sapelo Insurance they offer commercial insurance and group health insurances to business.