Sharon O’Day is an expert on everything that affects Americans as they make life-altering decisions about retirement. Over the course of five years, she has been writing about Medicare for financial advisors and expert-reviewed publications. Following a long career in international finance — with an MBA in Finance from the Wharton School — she put her research skills to work as she examined her own retirement decisions. She has since mentored hundreds of women in their mid-fifties about Medicare, Social Security, and retirement planning.