Principal Quality Engineer-Optical Systems
Coherent · Sunnyvale, CA
- 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. A ccountability – Own the Process and the Outcome.
- They ask for
- 10+ years
- Tools it names
- Lean, Six Sigma, Root cause, DMAIC, Control plans, CAPA
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
- Experience asked
- More than usual (10+ vs 5+)
Typical $100k–$149k, from 115 postings that list pay.
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.
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
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
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
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
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
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.
- Senior Principal Process Engineer · Process · Senior
- Senior Fiber Optic Module Packaging Engineer · Manufacturing · Senior
- Vice President of Engineering – Optical Circuit Switch (OCS) · Manufacturing · Director+
- Principal NPI Engineer · Manufacturing · Senior
- Principal Reliability and Quality Engineer (Optical Systems) · Quality · Senior
Full description from CoherentAs posted on their careers site.ShowHide
Responsibilities
- ◆Partner with cross-functional teams including optical design, mechanical engineering, manufacturing, process engineering, and suppliers to ensure quality is built into product and process development.
- ◆Lead structured root cause investigations using methodologies such as 8D, DMAIC, Fishbone, and 5-Why to resolve internal and customer-facing quality issues.
- ◆Drive corrective and preventive actions (CAPA) to closure and verify effectiveness through data-based validation and follow-up.
- ◆Develop and maintain quality plans, control plans, inspection strategies, and process documentation for optical systems and assemblies.
- ◆Implement and monitor yield metrics, and other quality indicators to reduce variation and improve product performance.
- ◆Conduct and support internal audits to ensure compliance with ISO 9001 and other applicable quality management standards.
- ◆Collaborate with suppliers to evaluate process capability, manage nonconformances, and improve overall supply chain quality performance.
- ◆Support new product introduction (NPI) and production ramp activities, ensuring process readiness, risk mitigation, and manufacturing scalability.
- ◆Drive continuous improvement initiatives using Lean and Six Sigma principles within a technical manufacturing environment.
- ◆Prepare and present quality performance reports, audit findings, and improvement plans to leadership and key stakeholders.
Education & Experience
M.S. or higher in Electrical Engineering, Optical Engineering, Mechanical Engineering, Materials Science, or related technical field.
- ✓Minimum 10 years of experience in quality engineering focused on optical systems, photonics devices, or optoelectronic assemblies.
- ✓Demonstrated experience supporting products through NPI and high-volume technical 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 site Environmental, Health, and Safety (EHS) procedures and Coherent 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 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.
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Skills
- •Strong technical understanding of optical systems including lasers, transceivers, photonic components, packaging, and opto-mechanical assemblies.
- •Exceptional root cause investigation and failure analysis capabilities in complex technical manufacturing environments.
- •Experience conducting internal audits and supporting external audits within ISO-based quality management systems.
- •Proven track record in process improvement, yield enhancement, and implementation of quality systems and controls.
- •Hands-on experience working closely with manufacturing teams to resolve quality escapes and improve process robustness.
- •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.
Physical
