Backend (BE) / OSAT Sourcing Buyer

onsemi is seeking a self-driven and motivated professional to join the External Manufacturing Sourcing team, located in Zhubei, Taiwan Region. As a Backend (BE) / OSAT Sourcing Buyer, you will work primarily with assigned outsourced semiconductor assembly and test suppliers, Business Units, and Operations teams to secure competitive, reliable assembly, packaging, and test services. We operate in a fast-paced, dynamic environment that requires a matrix organization approach to managing suppliers, stakeholders, and processes.

- BS degree in Supply Chain, Engineering, Business, or a related field from an accredited university is required.

- Must be willing to travel domestically and internationally up to 25% to support supplier engagements, business reviews, qualifications, and escalations.

- Three or more years of experience in the semiconductor industry, preferably in OSAT sourcing, backend manufacturing, assembly, packaging, test, or subcontract operations.

- Working knowledge of semiconductor backend cost drivers, including package materials, substrates and leadframes, assembly processes, test platforms, labor, yield, cycle time, equipment utilization, and capacity.

- Action-oriented, with demonstrated ability to deliver measurable results on cost, supply assurance, supplier performance, and strategic initiatives.

- Ability to work independently with minimal supervision while exercising sound judgment on priorities, supplier issues, and escalation paths.

- Ability to manage multiple priorities simultaneously, analyze commercial data, and focus on the actions with the greatest business impact.

- Fluency in written and spoken English is required; Mandarin Chinese is strongly preferred.