Senior Principal Process Engineer
Coherent
Listing collected from Coherent's career site. NextChapter is independent of Coherent.
Sunnyvale, CA · Posted October 5, 2026
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Where Sunnyvale, CA ranks
Where Sunnyvale, CA placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #1Best cities for consumer and retail pay after cost of living$194k · of 11
- #3Best cities for data and analytics pay after cost of living$213k · of 28
- #4Best cities for pay after cost of living in California$192k · of 32
- #4Best all-round cities for AI careers95 / 100 · of 100
- #4Best all-round cities for AI careers in the West Coast88 / 100 · of 39
- #5Best cities for pay after cost of living in the West Coast$192k · of 39
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
How AI is used in this kind of work
AI use among industrial engineers is little observed so far. Measured exposure for industrial engineers: 4% (little observed).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
Skills this job asks for
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About the job
Primary Duties & Responsibilities
Demonstrate a strong understanding of optical components, free-space optics, fiber optic devices, and fiber collimator coupling technologies.
Source, evaluate, and select optical components based on product performance, quality, and cost requirements.
Build and assemble prototypes according to optical design specifications and engineering requirements.
Characterize, test, and troubleshoot fiber optic devices to identify and resolve performance issues.
Generate comprehensive build documentation, test reports, and technical summaries.
Develop and maintain Standard Operating Procedures (SOPs) to support consistent manufacturing and testing processes.
Participate in product qualification and reliability testing activities to ensure compliance with performance standards.
Support new product introduction (NPI) activities, including transferring products to manufacturing and providing ongoing production support.
Education & Experience
BS or MS in engineering or related technical fields.
7-15 years of related experience.
Skills
Have good understanding of basic optical components and fiberoptic devices.
Ability to work with little supervision and to manage assigned tasks and projects effectively.
Ability to read, learn and analyze complex materials and processes, search for solutions in the public domain as well as create/develop innovative solutions.
Ability to leverage knowledge and experience and apply them to solve problems resourcefully.
Ability to search, locate and work proactively with external suppliers in the areas of his/her expertise to engage other capabilities into the project tasks involved in.
Effectively managing multiple priorities and projects.
Ability to teach and train others within work group.
Excellent interpersonal communication and presentation skills.
Proficient computer skills, experience with Word, Excel, Outlook, PowerPoint, Email, internet and the ability to develop tools and/or special applications within these packages.
Fiber optic experience is a plus.
Familiar with UV epoxies is a plus
Fiber Optical module package is a plus
Working Conditions
Good office working conditions and Class 10000 clean-room environment, wearing smock with mask and gloves.
Physical Requirements
Able to move light equipment and tooling ( 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.
Culture Commitment
Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.:
I ntegrity – Create an Environment of Trust
C ollaboration – Innovate Through the Sharing of Ideas
A ccountability – Own the Process and the Outcome
R espect – Recognize the Value in Everyone
E nthusiasm – 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.
If you need assistance or an accommodation due to a disability, you may contact us at talentacquisition@coherent.com .
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!
Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.