Executive Biography

Aaron Gillingham

Chief Human Resources Officer · Enterprise Leader · Advisor to CEOs & Boards

Aaron Gillingham helps organizations create clarity, align around priorities, and turn strategy into action.

Throughout his career, Aaron has partnered with CEOs, executive teams, and boards to strengthen leadership, modernize organizations, and improve business performance across healthcare, retail, financial services, and diagnostics.

Aaron has served as CHRO for WellSpan Health, UnityPoint Health, and Beaumont Health, leading human capital strategies for organizations with 38,000+ employees. His experience also includes leadership roles with Walmart, Quest Diagnostics, and Freddie Mac, providing a perspective shaped by large-scale operations, complex workforce environments, and highly regulated industries.

He has led HR transformations, organizational redesigns, technology implementations, labor strategy initiatives, executive succession efforts, and merger integrations. Aaron is known for bringing discipline, focus, and momentum to complex environments while helping leaders position their organizations for long-term success.

Career Highlights

• CHRO for organizations with 38,000+ employees
• CHRO at WellSpan Health, UnityPoint Health, and Beaumont Health
• Leadership roles with Walmart, Quest Diagnostics, and Freddie Mac
• Named a Becker’s Healthcare CHRO to Know in 2024 and 2025
• Led enterprise transformation, labor strategy, and succession planning
• Modernized HR operating models and enterprise technology

Areas of Expertise

Workforce Strategy · Leadership Development · Succession Planning · Organizational Transformation · HR Operating Models · Labor Strategy · Executive Team Effectiveness · HR Technology · Change Management · Total Rewards