Barbara Walker, BSN, RN, PHN, is an accomplished healthcare executive with extensive experience in clinical operations and management. Currently serving as Vice President of Marketplace Clinical Operations at Molina Healthcare since February 2025, Walker previously held the role of Vice President of Population Health Operations at Apex Health Solutions. Walker's tenure at Aetna as Associate Vice President of Utilization Management Operations involved leading operations for over 1,600 staff, enhancing clinical compliance, and implementing technology-driven improvements. Additional experience includes leadership positions at Humana and UnitedHealth Group, where Walker developed and managed various medical management programs and operational models for large populations, resulting in improved clinical outcomes and organizational efficiencies. Walker holds a BSN in Nursing from Winona State University.