Test Process Engineer 1
San Miguel, Manila, Metro Manila, Philippines
Posted on Aug 21, 2026
onsemi is currently seeking a hands-on Process Engineer. This person will utilize innovative concepts and best-known methods to improve and develop processes and products. The ideal candidate will also provide technical leadership, support, and training to internal and external customers.
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. |
- Graduate of Bachelor of Science in Engineering course primarily on Electronics Technology, Electronics Engineering (Undergraduate), Mechatronics Engineering or equivalent.
- Experience in semiconductor or electronics manufacturing is an advantage.
- Basic knowledge of manufacturing processes and equipment.
- Excellent analytical, organizational, planning, and problem-solving/troubleshooting skills.
- 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 must be able to work independently with limited supervision.
- Proficient in advanced techniques with relevant software: MS Project, Excel, PowerPoint, Word, etc.
Position Summary
The Test Process Engineer is responsible for developing, optimizing, and sustaining semiconductor test processes to ensure high yield, reliability, and cost-effective production. This role focuses on troubleshooting test-related issues, driving yield improvement, and ensuring robust test coverage across products.
- Develop, qualify, and release test processes for new products (NPI to Production transition).
- Define test methodologies, limits, and guard bands based on characterization data.
- Optimize test programs to improve throughput, test time, and cost efficiency.
- Monitor daily test yield performance and identify yield loss drivers.
- Perform Pareto analysis on failures and drive root cause analysis (RCA) and implement corrective/preventive actions (CAPA).
- Collaborate with cross-functional teams (Assembly, Design, Wafer Fab) to resolve systemic issues.
- Ensure proper handler/prober interface and test setup optimization by working with equipment engineering to resolve tester hardware issues.
- Implement and maintain SPC controls (UCL/LCL, Cpk, Ppk) for critical parameters and track key metrics such as yield, test escapes, retest rate, and DPPM.
- Establish control plans and reaction plans for out-of-control conditions.
- Drive test cost reduction initiatives (test time, multi-site optimization, program efficiency) by improving productivity through automation and standardization
- Document test procedures, specifications, and engineering change notices (ECNs).