Rob Mionis

Rob Mionis has served as President and CEO of Celestica Inc. since 2015, executing one of the most remarkable strategic transformations in the electronics manufacturing services (EMS) industry. When Mionis took over, Celestica was a struggling EMS provider competing primarily on cost in commodity manufacturing. He systematically repositioned the company toward higher-value, higher-margin segments — particularly data center infrastructure and networking equipment. This pivot proved prescient: as the AI infrastructure buildout accelerated from 2023 onward, Celestica emerged as a critical supplier of AI server assembly, high-speed networking switches, and rack-scale solutions for hyperscale cloud providers. The company's Connectivity & Cloud Solutions (CCS) segment, which serves hyperscaler data centers, has become the primary growth engine, with Celestica manufacturing networking hardware for major customers including a large networking equipment provider whose products are central to AI data center architecture. Under Mionis' leadership, Celestica's stock price increased by over 1,000% from its 2022 lows to 2025 highs, making it one of the best-performing AI infrastructure names globally. His decisions on capacity expansion to meet hyperscaler demand, customer concentration risk management, vertical integration into higher-value design services, and margin expansion as the product mix improves are the primary drivers of Celestica's stock performance.