Test Process Engineer 1

Onsemi; Tarlac City; On-site; PHP 500,000 - 750,000; Full time

Job summary

onsemi is seeking a hands-on Process Engineer in the Philippines to develop, optimize, and sustain semiconductor test processes for high yield and cost-effective production. You will lead test program improvements, define methodologies, and collaborate with Assembly, Design, and Wafer Fab teams to resolve issues.

The role emphasizes debugging test-related issues, driving yield improvements, and maintaining robust test coverage across products with data-driven decision making.

Qualifications

• Bachelor of Science in Engineering, Electronics/Mechatronics, or equivalent.
• Experience in semiconductor manufacturing is an advantage.
• Strong analytical, organizational, planning, and problem-solving skills.
• Proficient with MS Office and data analysis tools.

Responsibilities

• 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 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 metrics like yield, test escapes, retest rate, and DPPM.
• Establish control plans and reaction plans for out-of-control conditions.
• Drive test cost reduction initiatives by improving productivity through automation and standardization
• Document test procedures, specifications, and ECNs.

Skills

MS Project

Excel

PowerPoint

Word

Education

Bachelor of Science in Engineering (Electronics/Mechatronics)

Job description

San Miguel Tarlac City, Philippines, Philippines

Job Description

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.

Responsibilities

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).
  

Qualifications

• 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.

About Us

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.

Job Info

• Job Identification 2506285
• Job Category Engineering, Manufacturing
• Posting Date 08/21/2026, 08:14 AM
• Degree Level Bachelors
• Job Schedule Full time
• Job Shift Day
• Locations Luisita Industrial Park, Tarlac City, 2301, PH