Walgreen Co. named Robyn L. Peters as group vice president of managed market sales. Peters will lead all sales and account management activities in the company's employer, health systems, health plans, government and small and individual payer segments, along with client retention, expansion programs and sales operations for Walgreens. Peters brings more than 25 years of health care experience in marketing, market access and reimbursement, and business development positions. Most recently, Peters was vice president of U.S. payers and national accounts, corporate and government customers for Pfizer Inc. Peters will report to Jeff Berkowitz, Walgreens senior vice president, pharmaceutical development and market access. Peters replaces Joseph Terrion, chief client officer, who is leaving the company to pursue personal interests at this time.