Amprius Technologies is seeking a Senior Supplier Development Engineer to lead technical engagement with suppliers supporting advanced lithium-ion cell materials, components, and contract manufacturing. This role is responsible for qualifying and developing suppliers, industrializing new processes, and driving launch readiness from NPI through volume production. The ideal candidate is a self-starting engineer with strong battery manufacturing knowledge, hands-on supplier troubleshooting capability, and sound judgment in quality, process control, and scale-up risk.

Responsibilities
• Lead technical selection, qualification, and development of suppliers for battery raw materials, cell components, and contract manufacturing partners.
• Drive supplier industrialization from initial process assessment through pilot, qualification, and production ramp, ensuring readiness for volume manufacturing.
• Evaluate supplier manufacturing flows, process capability, capacity, and expansion plans to identify constraints, mitigate risk, and support long-term scaling.
• Partner with suppliers to optimize process performance, yield, quality controls, and manufacturability across material and cell production operations.
• Establish and approve appropriate quality planning deliverables, including APQP/PPAP elements, control plans, PFMEA, SPC, MSA, and process validation activities.
• Support implementation and improvement of IQC, IPQC, and OQC systems at supplier sites to ensure robust incoming and in-process quality.
• Lead on-site supplier audits focused on technical capability, manufacturing discipline, quality systems, and production readiness.
• Drive failure analysis and corrective action with suppliers using structured methods such as 8D, root cause analysis, and verification of corrective/preventive actions.
• Work cross-functionally with engineering, quality, operations, and supply chain teams to align supplier capability with product requirements, design intent, and launch milestones.
• Serve as the primary technical interface to supplier engineering and quality teams, providing clear communication of risks, actions, and progress to internal stakeholders.

Qualifications
• Demonstrated experience taking products or processes from NPI through qualification and ramp to volume production with external suppliers or contract manufacturers.
• Strong understanding of battery cell manufacturing processes (electrode coating, cell assembly, formation) or key battery components (anode/cathode materials, separators, electrolytes).
• Working knowledge of quality and process control tools, including PFMEA, control plans, SPC, MSA/GRR, Cpk, DOE, and structured problem solving.
• Ability to analyze manufacturing and test data, draw sound technical conclusions, and drive actionable improvement plans with suppliers.
• Strong written and verbal communication skills, with the ability to influence cross-functional teams and external partners.
• Experience in high-volume manufacturing environments is strongly preferred.
• Familiarity with battery failure analysis, metrology, and qualification testing is preferred.
• Korean language capability is a plus.

Requirements
• B.S. or higher in Chemical Engineering, Materials Science, Mechanical Engineering, Electrical Engineering, or a related technical discipline.
• 5+ years of experience in supplier development, manufacturing engineering, quality engineering, or supplier industrialization within lithium-ion batteries, battery materials, or closely related advanced manufacturing.
• Experience conducting supplier audits and assessing compliance with quality management standards such as ISO 9001, IATF 16949, and/or AS9100.
• Ability to travel domestically and internationally up to approximately 30-40%.

Benefits
• Comprehensive compensation package includes base salary + RSUs. Salary range for this role is $120,000 to $190,000. Base salary will be determined based on knowledge, experience, and education.
• Health benefits include medical, dental and vision coverage. Medical options of HMO and PPO plans.
• Employer-funded Health Reimbursement Account (HRA). HSA compatible Medical Plan, FSA Options.
• Pet Health Insurance (dog & cats)
• Traditional and Roth 40l(k) Plans
• Generous vacation leave starts with 3 weeks annual accrual. 10 paid holidays. Sick time off.
• Cell phone reimbursement