Principal Supplier Quality Engineer

Posted Yesterday
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San Diego, CA, USA
In-Office
125K-175K Annually
Senior level
Hardware • Semiconductor • Quantum Computing • Manufacturing
The Role
Lead supplier quality for optics, micro-electronics, fiber optics, and exotic metal components. Perform drawing/GD&T reviews, FAIs, supplier audits, root-cause analyses and CAPA (8D), track quality metrics, support NPI qualification, and drive DFx with internal teams to ensure supplier readiness and production delivery.
Summary Generated by Built In

Join our fast-paced and passionate team as a Principal Supplier Quality Engineer. As Monarch Quantum scales, you will play a key hands-on role in ensuring that our supply base meets the exceptional quality standards required for our laser light engines and quantum computing platforms. Reporting to the Director of Supply Chain, you will bridge technical design requirements with vendor capabilities, maintaining direct oversight of critical hardware components.  

This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You will work directly with suppliers of optics, micro-electronics, fiber optics, and exotic metal components to prevent defects, resolve technical issues, and ensure seamless delivery into production (DFx).  

Key Responsibilities: 

  • Supplier Quality Operations: Oversee day-to-day supplier quality performance for key vendors supplying 2 or more of the following:  optics, PWBAs, fiber optic harnesses, and exotic metal components (MoCu, Kovar, Molybdenum).  
  • Technical Drawing & GD&T Review: Interpret complex technical drawings, optical specs, and GD&T tolerances to verify supplier manufacturing readiness and inspection capability.  
  • NPI Support & Qualification: Execute First Article Inspections (FAI), review supplier manufacturing plans, and lead component qualification activities during New Product Introduction (NPI) phases.  
  • Auditing & Onsite Inspections: Conduct technical, process, and QMS audits at supplier facilities to verify process controls, cleanroom compliance, and quality systems.  
  • Defect Resolution & CAPA: Lead technical root-cause analyses for supplier non-conformances (RMA/MRB) and enforce rigorous Corrective and Preventive Action (8D CAPA) execution.  
  • Supplier Development: Track supplier quality metrics (yield, defect rate, delivery quality) and mentor key suppliers to continuously improve technical yield and process control.  
  • Cross-Functional Collaboration: Partner closely with Monarch Design Engineers and Manufacturing Engineers to drive Design for Manufacturability/Quality (DFx) and resolve integration challenges.  

Requirements

Please note: This position requires access to export-controlled information. Employment is contingent upon the applicant being a U.S. person as defined by 8 U.S.C. § 1324b(a)(3).  

Skills & Experience:

  • Education: Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Optical Engineering, Materials Science, or related technical field.  
  • Experience: Minimum of 8+ years of experience in supplier quality, manufacturing quality, or hardware quality engineering in high-precision technology sectors.  
  • Technical Experience: Practical quality control experience across key commodity areas: 
  • Machining and fabrication of exotic alloys (MoCu, Kovar, Mo). 
  • Precision optical assemblies and optical fiber handling/splicing. 
  • PCBA manufacturing, SMT processes, and IPC standards. 
  • Core Competencies: Proficient in GD&T, CMM/optical inspection techniques, FMEA, 8D problem-solving, and ISO 9001 environment controls.  
  • Communication & Collaboration: Strong interpersonal skills to effectively interface with technical suppliers and internal engineering teams.  
  • Travel: Ability to travel up to 20–30% (domestic and international) to supplier sites. 

Startup Mindset: 

  • You're creative, flexible, and eager to wear multiple hats - you don't wait for a process to exist; you build it.  
  • You're passionate about building systems from the ground up and comfortable with ambiguity and change.  

Benefits

The expected annual salary range for this position is $125,000-$175,000.

As a full-time employee, you will be eligible for Monarch’s comprehensive benefits package, which includes:

  • Medical, Dental, and Vision insurance
  • Fidelity 401(k) plan with 4% employer matching
  • 20 paid time off (PTO) days per year
  • 13 paid company holidays
  • 9/80 work schedule (every other Friday off)

Monarch is proud to be an equal opportunity employer and does not discriminate on the basis of race, color, citizenship status, national origin, ancestry, sex, sexual orientation, age, religion, creed, physical or mental disability, medical condition, marital status, veteran status or any other characteristics protected under applicable federal, state and local laws.

Skills Required

  • Bachelor's degree in Mechanical, Electrical, Optical Engineering, Materials Science, or related technical field.
  • Minimum of 8+ years experience in supplier quality, manufacturing quality, or hardware quality engineering in high-precision technology sectors.
  • Practical experience machining and fabricating exotic alloys (MoCu, Kovar, Molybdenum).
  • Experience with precision optical assemblies and optical fiber handling/splicing.
  • Experience with PCBA manufacturing, SMT processes, and IPC standards.
  • Proficiency in GD&T, CMM/optical inspection techniques, FMEA, 8D problem-solving, and ISO 9001 environment controls.
  • Experience executing First Article Inspections (FAI), supplier qualification, and New Product Introduction (NPI) support.
  • Experience conducting technical, process, and QMS audits at supplier facilities including cleanroom compliance.
  • Strong interpersonal and collaboration skills to interface with suppliers and internal engineering teams.
  • Ability to travel up to 20-30% domestically and internationally to supplier sites.
  • Must be a U.S. person as defined by 8 U.S.C. § 1324b(a)(3) to access export-controlled information.
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The Company
HQ: San Diego, CA
Year Founded: 2025

What We Do

Monarch Quantum is a U.S.-based quantum photonics company that designs and manufactures integrated photonics systems, known as Quantum Light Engines™, for quantum computing, sensing, and communications.

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