Senior Principal Reliability Engineer

Job Description

onsemi is seeking a Senior Principal Reliability Engineer to join our team in Scottsdale, Arizona. In this role, you will serve as a key contributor within a cross‑functional organization dedicated to delivering technologies and products that meet or exceed customer expectations for robustness, durability, and long‑term reliability. You will collaborate with a global engineering team to drive the integration of new silicon, silicon carbide, and advanced packaging technologies.

This role will champion power cycle methods and analysis within the reliability team, as such the candidate needs strong foundation in power cycle testing methods, effective experimental design along with analysis and communication of results. This position requires deep expertise in power semiconductor device physics, packaging design & materials, and reliability stress testing. The ideal candidate will also demonstrate strong proficiency in lifetime modeling for power semiconductors using statistical tools and reliability data, along with efficient communications with executive stakeholders and external customers.

• Drive world‑class standards for power cycle methods, processes and analysis.
• Perform statistical data analysis to interpret and communicate reliability assessment results.
• Conduct lifetime modeling for power semiconductor products.
• Collaborate with fab and packaging technology development teams to perform reliability assessments and recommend risk‑mitigation strategies.
• Lead structured problem‑solving efforts to identify root causes and define corrective actions for reliability failure mechanisms.
• Develop reliability plans to characterize potential reliability risks and qualify new products, technologies, and process changes.
• Correlate reliability failure mechanisms with design, process, and material characteristics to drive continuous reliability improvement.
• Partner with internal laboratories to execute reliability stress tests and conduct failure analyses.
• Develop and implement new reliability test methodologies in collaboration with internal labs.

• MS or PhD in Materials Science, Mechanical Engineering, Electrical Engineering, or a related field.
• Knowledge of AQG
  324 guidelines, power cycle testing and lifetime modeling for power semiconductors.
• Strong understanding of reliability failure mechanisms and physics in semiconductor products.
• Proficiency in structured problem‑solving methodologies and tools (8D, FMEA, fishbone analysis).
• Experience using statistical analysis software (JMP, Minitab).
• Willingness to travel domestically and internationally (less than 10%).
• Excellent verbal and written communication skills in English.

• PhD with 4+ years of relevant experience with semiconductor power cycle testing and analysis is a plus.
• 4+ years of experience in reliability engineering or semiconductor fab/package development is a plus.
• Experience in advanced packaging research and development is a plus.
• Thermal characterization experience for power modules is a plus.
• Familiarity with industry standards (AQG, AEC, JEDEC, MIL, IEC) is a plus.

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.

onsemi is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, ethnicity, color, religion, ancestry, national origin, age, marital status, pregnancy, sex, sexual orientation, physical or mental disability, medical condition, genetic information, military or veteran status, gender identity, gender expression, or any other protected category under applicable federal, state, or local laws.

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