Registered Nurse (RN). Greenfield Rehabilitation & Health Care Center– Greenfield, IA. $7,500 Sign on Bonus for Full-Time employees. Up to $34.50/hour. If you want to work for a company that truly values and appreciates its employees, join. Greenfield Rehabilitation & Health Care Center. We are seeking a. Registered Nurse (RN). to join our talented nursing team. If you are a dedicated, highly motivated, energetic, and dependable Registered Nurse ...