External MFG Principle Engineer
Full-time
Thailand
Posted on Nov 14, 2026
onsemi is currently seeking a hands-on Assembly Process Engineer to join our External Manufacturing team. In this role, you will be responsible for managing and improving the operational and technical performance of assigned external manufacturing partners/subcontractors, ensuring manufacturing readiness and sustained performance across Quality, Yield, Delivery, Cycle Time, Capacity and Cost.
onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.
More details about our company benefits can be found here:
| We are committed to sourcing, attracting, and hiring high-performance innovators, while providing all candidates a positive recruitment experience that builds our brand as a great place to work. |
- The successful candidate will have, at a minimum, a Bachelor’s degree in Engineering and or Physics.
- 10+ years of industrial experience in assembly process (FOL or EOL).
- Experience with Minitab or JMP Statistical analysis software preferred.
- Excellent analytical, organizational, planning, and problem-solving/troubleshooting skills.
- Proven ability to identify, assess, and solve problems.
- Experience with project management and multi-stakeholder management
- Experience with data-driven continuous improvement, Six Sigma training preferred.
- Comfortable in a fast-paced engineering and manufacturing environment.
- Well-developed interpersonal and communication skills, and ability to manage conflict in a stressful environment.
- Understands and listens to team members and fosters a productive team environment.
- Handles multiple projects and priorities.
- Must be able to work independently with limited supervision.
- Proficient in advanced techniques with relevant software: MS Project, Excel, PowerPoint, Word, etc. in addition to experience working within shared work environments.
- Domestic and international travel may be required depending on project assignment
- Serve as the primary operational and engineering interface for assigned OSAT/subcontract manufacturing sites
- Drive subcontractor performance across:
- Quality
- Assembly/Test Yield
- On-Time Delivery
- Cycle Time
- Capacity
- Cost/Productivity
- Conduct regular operational reviews with subcontractors and track performance against agreed KPIs.
- Experience in DOE methodology & tools (Minitab, JMP)
- Good problem-solving skills, able to identify & resolve assembly quality issue/defects, perform root cause analysis & implement robust corrective actions
- Manage change control processes & documentations, including risk assessment, schedule planning, budget planning.
- Manage effective communication between cross functional team – BU, planning, reliability engineering to drive on-time execution & release of change project
- Adoption of data analytics and data-driven approach to problem solving and decision making
- Subject Matter Expert (SME) in key process (either DA, WB, mold) is preferable
- Experience in project management – technical lead for large scale site transfer project including driving risk assessment, define CZ/DOE plan, execute qualifications and CAB closure.
- Accountable for seamless operation in subcon – provide maverick lot disposition & verification
- Other tasks as needed or assigned.