More than 70 years after her career began, 96-year-old Florence “SeeSee” Rigney, the oldest working nurse in America, has retired. MultiCare Health System officials said her last day was Friday, July 16. Rigney began as a student nurse at the Tacoma General School of Nursing. When she started nursing, penicillin had just been introduced. Her career has taken her across the country, from Washington to Texas to Wyoming, with short breaks to care for her family. She has two children.