Reliability Engineer

II-VI UK, Ltd.; Sherman (TX); On-site; USD 90,000 - 120,000; Full time

Job summary

Coherent Corp. in Sherman, TX is seeking a Reliability Engineer to develop and execute qualification plans for new products and technologies. You will design and oversee reliability testing including burn-in, life tests, HTOL, TC, thermal shock, damp heat, HAST, and interpret results.

You'll analyze accelerated stress data, drive root-cause investigations, and author reports. Collaboration across teams and clear technical communication are essential.

Qualifications

• B.S. or M.S. in Physics, Engineering, Materials Science, Statistics, Applied Mathematics, or related technical discipline.
• 3+ years of experience in semiconductor reliability, optoelectronic device engineering, product engineering, test engineering, or related fields.
• Experience working with semiconductor optoelectronic devices or optical communication components.
• Experience planning, executing, and analyzing engineering experiments.

Responsibilities

• Develop and execute qualification plans for new products and technologies.
• Design and oversee reliability testing including burn-in, life test, HTOL, TC, thermal shock, damp heat, HAST.
• Provide instructions and technical guidance to technicians and operators performing reliability stresses and tests.
• Analyze accelerated stress data to determine acceleration factors, lifetime projections, FIT, reliability confidence intervals.
• Perform statistical analysis using JMP, Excel, Python, or similar tools to identify reliability trends and degradation mechanisms.
• Determine samples requiring physical failure analysis and coordinate FA activities.
• Interpret results from SEM, FIB, EDX, cross-section analysis, material analysis, and related techniques.
• Drive corrective actions and reliability improvements through root-cause investigations.
• Develop, validate, and optimize electrical and optical test methodologies for photodiodes and laser devices.
• Improve test capability, measurement accuracy, throughput, repeatability, and reproducibility.
• Author Qualification Test Reports (QTRs), reliability assessments, and customer-facing reliability documentation.
• Present reliability test results and recommendations to management, customers, and cross-functional teams.

Skills

Reliability analysis

Life testing

DOE

Statistical analysis

Semiconductor physics

Test development

Education

Bachelor's or Master's degree in Physics/Engineering/Materials Science

Tools

JMP

Excel

Python

SQL

Job description

Develop and execute qualification plans for new products and technologies

Design and oversee reliability testing including burn-in, life test, HTOL, TC, thermal shock, damp heat, HAST

Provide instructions and technical guidance to technicians and operators performing reliability stresses and tests

Analyze accelerated stress data to determine acceleration factors, lifetime projections, FIT, reliability confidence intervals

Perform statistical analysis using JMP, Excel, SQL, or similar tools to identify reliability trends and degradation mechanisms

Determine samples requiring physical failure analysis and coordinate FA activities

Interpret results from SEM, FIB, EDX, cross-section analysis, material analysis, and related techniques

Drive corrective actions and reliability improvements through root-cause investigations

Develop, validate, and optimize electrical and optical test methodologies for photodiodes and laser devices

Improve test capability, measurement accuracy, throughput, repeatability, and reproducibility

Author Qualification Test Reports (QTRs), reliability assessments, and customer-facing reliability documentation

Present reliability test results and recommendations to management, customers, and cross-functional teams

Education & Experience

• B.S. or M.S. in Physics, Engineering, Materials Science, Statistics, Applied Mathematics, or related technical discipline
• 3+ years of experience in semiconductor reliability, optoelectronic device engineering, product engineering, test engineering, or related fields
• Experience working with semiconductor optoelectronic devices or optical communication components
• Experience planning, executing, and analyzing engineering experiments

Skills

• Reliability analysis and lifetime modeling
• Statistical analysis using JMP, Excel, Python, or equivalent tools
• Design of Experiments (DOE)
• SQL and data analysis tools
• Strong understanding of III-V semiconductor device physics
• Knowledge of laser and photodiode operation, performance characterization, and degradation mechanisms
• Optical and electrical test development for photodiodes and laser devices
• Reliability and qualification standards for semiconductor and optoelectronic products
• Ability to manage multiple projects simultaneously and meet aggressive deadlines
• Strong technical communication skills, both written and verbal
• Excellent problem-solving and root-cause investigation skills
• Effective collaboration within cross-functional engineering teams

Working Conditions

• Ability to work in a semiconductor cleanroom environment
• Support qualification and production activities in a 24/7 manufacturing environment

Physical Requirements

• Work in a Class 100/1000 cleanroom environment for extended periods
• Wear full cleanroom attire
• Stand and sit for extended periods as required
• Handle test hardware and measurement equipment

Safety Requirements

All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards.

Quality and Environmental Responsibilities

Depending on location, this position may be responsible for the execution and maintenance of the ISO 9000, 9001, 14001 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System.

CultureCommitment

Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.:

Integrity – Create an Environment of Trust

Collaboration – Innovate Through the Sharing of Ideas

Accountability – Own the Process and the Outcome

Respect – Recognize the Value in Everyone

Enthusiasm – Find a Sense of Purpose in Work

Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.

Coherent is a global leader in lasers, engineered materials and networking components. We are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program. It's an exciting opportunity to work for a company that offers stability, longevity and growth. Come Join Us!

Job Info

• Job Identification 2013488
• Posting Date 08/05/2026, 03:35 PM
• Degree Level Bachelor's Degree
• Job Schedule Full time
• Locations 6800 South, US-75, Sherman, TX, 75090, US