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Principal Reliability and Quality Engineer (Optical Systems)

Coherent · Sunnyvale, CA

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Level
Senior
Team
Quality
Experience asked
10+ years
Industry
Industrial
Posted
30+ days ago

The role in 30 seconds

A senior quality role at Coherent (industrial) in Sunnyvale, CA. Or higher in Electrical Engineering, Optical Engineering, Mechanical Engineering, Materials Science, or related technical field.

They ask for
10+ years
Tools it names
Lean, Six Sigma, Root cause, DMAIC, SPC, Validation (IQ/OQ/PQ)

Read from the posting. The full description is below.

From the plant jobs report · week of November 2, 2026

Quality Engineer roles in California: typical posted base $100k–$153k.

Median of the low and high ends of 119 live postings that list pay, out of 235 quality engineer openings in California, read from manufacturers' own careers sites.

California plant jobs report →Pay by team and state →What moves pay →

How this role compares

Against 234 other live quality postings in California.

Base pay
Not listed in this posting

Typical $100k–$149k, from 115 postings that list pay.

Experience asked
More than usual (10+ vs 5+)

Similar roles usually ask 5+ years.

Skills these teams ask for most

  • ✓ Root cause 76%
  • FMEA 48%
  • ✓ Validation (IQ/OQ/PQ) 43%
  • Supplier quality 43%
  • AS9100 40%
  • ISO 9001 35%

✓ = this posting asks for it too. % = share of similar postings that mention it.

Stands out: this posting asks for DMAIC, EHS / safety, which few similar roles mention. If you have it, lead with it.

It asks for 10+ years. If you're close, apply anyway: requirements are a wish list. Talk to someone doing this work there first.

At a glance

Pulled from the posting text. If it's not listed here, the posting didn't say.

How to get in at this plant

Five moves over a week or two. The first one takes ten minutes.

  1. 1

    Pick 2–3 people on the Quality team at Coherent

    Engineers who joined in the last year or two reply the most. Use the team search on this page to find them.

  2. 2

    Send a short, curious note

    One real question about their work. No favors yet. Each person gets a different note, written for this role.

  3. 3

    Turn a reply into a short call

    Questions worth asking about this team:

    • What does a normal week look like on your team?
    • Which standards drive the work here: ISO 13485, IATF 16949, AS9100?
    • How much of the job is customer complaints versus prevention?
    • How did you land the job? What stood out in your interviews?
  4. 4

    Apply with someone vouching for you

    If the call went well, ask whether they’d pass your résumé to the hiring manager. Send your résumé link, apply that day, and let them know.

  5. 5

    Bring proof to the interview

    One page of before-and-after numbers from projects you led: scrap, OEE, cycle time, cost. Plant managers hire on results.

This plant: Coherent in Sunnyvale

5 other open roles at this site.

Full description from CoherentAs posted on their careers site.Show

Responsibilities

  • ◆Lead reliability strategy development for new optical product platforms, ensuring robust design and manufacturability from early architecture stages through production ramp.
  • ◆Collaborate closely with optical designers, mechanical engineers, process engineers, manufacturing teams, and suppliers to identify technical risks and implement mitigation plans to prevent product failures.
  • ◆Lead root cause investigations and failure analysis activities, leveraging physics-of-failure principles and structured problem-solving techniques (8D, DMAIC, etc.).
  • ◆Drive quality improvements through process optimization, data-driven decision making, and continuous improvement methodologies (Lean, Six Sigma, SPC).
  • ◆Establish and improve quality systems, procedures, and metrics appropriate for a dynamic, startup-oriented environment while maintaining compliance with corporate and industry standards.
  • ◆Define and execute comprehensive qualification and validation plans to ensure product robustness, lifetime performance, and compliance with internal and customer reliability requirements.
  • ◆Develop and implement reliability test methodologies including accelerated life testing, environmental stress screening, HALT/HASS, and aging studies.
  • ◆Analyze reliability data using statistical methods to estimate lifetime performance, failure rates, and confidence levels; clearly communicate findings to technical and executive stakeholders.
  • ◆Partner with suppliers to evaluate process capability, manufacturing readiness, and long-term reliability risks.
  • ◆Support production ramp activities, ensuring scalability, yield improvement, and sustained reliability performance.Lead reliability strategy development for new optical product platforms, ensuring robust design and manufacturability from early architecture stages through production ramp.
  • ◆Collaborate closely with optical designers, mechanical engineers, process engineers, manufacturing teams, and suppliers to identify technical risks and implement mitigation plans to prevent product failures.
  • ◆Lead root cause investigations and failure analysis activities, leveraging physics-of-failure principles and structured problem-solving techniques (8D, DMAIC, etc.).
  • ◆Drive quality improvements through process optimization, data-driven decision making, and continuous improvement methodologies (Lean, Six Sigma, SPC).
  • ◆Establish and improve quality systems, procedures, and metrics appropriate for a dynamic, startup-oriented environment while maintaining compliance with corporate and industry standards.
  • ◆Define and execute comprehensive qualification and validation plans to ensure product robustness, lifetime performance, and compliance with internal and customer reliability requirements.
  • ◆Develop and implement reliability test methodologies including accelerated life testing, environmental stress screening, HALT/HASS, and aging studies.
  • ◆Analyze reliability data using statistical methods to estimate lifetime performance, failure rates, and confidence levels; clearly communicate findings to technical and executive stakeholders.
  • ◆Partner with suppliers to evaluate process capability, manufacturing readiness, and long-term reliability risks.
  • ◆Support production ramp activities, ensuring scalability, yield improvement, and sustained reliability performance.

Education & Experience

B.S, M.S. or higher in Electrical Engineering, Optical Engineering, Mechanical Engineering, Materials Science, or related technical field.

  • ✓Minimum 10 years of experience in reliability and quality engineering focused on optical systems, photonics devices, or optoelectronic assemblies.
  • ✓Demonstrated experience supporting products through NPI and high-volume manufacturing environments.
  • ✓Experience working in fast-paced or startup environments preferred.

Requirements

Ability to work in laboratory and manufacturing environments, including extended periods of sitting, standing, and use of standard lab 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.

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 ccou

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Skills

  • •Strong technical understanding of optical systems including lasers, optical switching, transceivers, photonic components, packaging, and opto-mechanical assemblies.
  • •Expertise in reliability statistics, Weibull analysis, accelerated life testing, and physics-of-failure methodologies.
  • •Hands-on experience with failure analysis techniques such as cross-sectioning, SEM, material analysis, and electrical/optical characterization.
  • •Proven track record in process improvement, yield enhancement, and implementation of quality management systems.
  • •Ability to synthesize complex technical data into clear, actionable recommendations for cross-functional teams and leadership.
  • •Strong communication skills and ability to work effectively across global teams and suppliers.
  • •Self-driven, adaptable, and comfortable operating in ambiguous or rapidly evolving environments.

Working Conditions

  • •Office environment with regular interaction in laboratory and manufacturing settings.
  • •Occasional domestic and international travel to suppliers and manufacturing sites may be required.Office environment with regular interaction in laboratory and manufacturing settings.
  • •Occasional domestic and international travel to suppliers and manufacturing sites may be required.

Physical

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