John Callahan

John Callahan is an experienced professional in customer quality engineering and management within the semiconductor industry. Currently serving as the Manager of Customer Quality Engineering at Entegris since July 2022, John leads a high-performing team to address quality concerns and enhance strategic processes. Prior to this role, John spent over five years at Lam Research, holding positions such as Sr. Customer Quality Engineer and Regional Field Service Manager, where responsibilities included overseeing a diverse team to maintain high-value fabrication units and managing customer relations. John has a distinguished background in the US Navy as a Lieutenant Commander and Naval Aviator, where extensive leadership and training achievements were established, including managing large personnel and operational programs. John holds a Master of Science in Global Leadership and a Bachelor's degree in Industrial Engineering, supplemented with a Graduate Certificate in Project Management from the University of San Diego and Marquette University.