John Castillo is a Capex Lead Buyer with 18 years of experience in supply chain management and global purchasing at ON Semiconductor. They are results-oriented, possessing strong negotiation skills that drive savings and foster supplier partnerships. John has led global savings initiatives and internal process improvements, developing category strategies based on comprehensive analysis of internal and external needs. Their previous role as an Industrial/Process Engineer Intern at Amkor Technology involved generating equipment checklists and monitoring machine performance. John is proficient in MS Office and advanced AutoCAD tools.
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