Staff Manufacturing Process Engineer - Battery Cell Assembly

Amprius•Fremont, CA

1d•Onsite

About The Position

Amprius Technologies is hiring a hands-on Staff Manufacturing Process Engineer to join its Manufacturing group in Fremont, California. The engineer will own process parameters, first-pass yield, and throughput for a group of lithium-ion cell-assembly stations. Assignments may cover front-end assembly—including electrode notching, stacking, and tab welding—or back-end assembly—including pouch forming, sealing, electrolyte filling, and degassing—based on experience. The role supports bringing new pilot-line equipment online and ramping it to full production rate, and reports to the Pilot Line Manager. Within the first year, the engineer is expected to own first-pass yield and overall equipment effectiveness (OEE) for assigned stations; release qualified process windows, control plans, and SOPs; and deliver measurable yield and cycle-time improvements that increase line output. The position is based on-site in Fremont, primarily on the production floor and in the dry room, with some desk and computer work. It involves working with lithium-ion cells, electrolyte, and solvents under established safety controls. Occasional off-shift or weekend support may be needed for production escalations. The role requires lifting up to 25 pounds at a time.

Requirements

Bachelor’s degree in Mechanical, Chemical, Materials, Industrial, or Electrical Engineering, or a related field.
At least 8 years of process or manufacturing engineering experience in lithium-ion cell production or comparable precision manufacturing, including hands-on ownership of cell-assembly processes.
Hands-on experience running, tuning, and qualifying cell-assembly equipment such as electrode notching or slitting, stacking or winding, ultrasonic or laser tab welding, pouch forming and sealing, electrolyte filling, and degassing.
Demonstrated ownership of yield or throughput improvements from data analysis and root-cause investigation through implementation and sustained results.
Proficiency with DOE and statistical analysis using JMP, Minitab, or equivalent; SPC; PFMEA; and measurement system analysis (Gage R&R).
Working knowledge of how assembly parameters and defects—including alignment, weld quality, seal integrity, moisture ingress, and contamination—affect lithium-ion cell performance, safety, and yield.
Takes initiative, works with minimal supervision, owns critical projects, and collaborates well with technicians, operators, and cross-functional engineers.
Clear written and verbal communication, including the ability to write SOPs and present data-driven recommendations to leadership.
Able to work daily in a dry room and on the production floor, and committed to environmental, health, and safety requirements.
Able to lift up to 25 pounds at a time.

Nice To Haves

Advanced degree.
Pouch-cell assembly experience and exposure to silicon-anode or other next-generation chemistries.
Experience with MES and tool-data extraction and analysis using Python, SQL, or similar.
Six Sigma Green Belt, Black Belt, or equivalent lean certification.
Experience bringing new equipment or a new line from FAT/SAT through ramp to production rate.
For Staff level, experience mentoring engineers and leading cross-functional improvement programs.

Responsibilities

Own process parameters for assigned cell-assembly stations; develop recipes, define and qualify process windows, and maintain process specifications and control plans.
Design and run structured experiments (DOE) to optimize parameters for yield, cycle time, and cell performance; release results as specifications, SOPs, and operator training.
Own first-pass yield and scrap at assigned stations; build defect Paretos, lead root-cause investigations using methods such as 8D, 5-Why, and fishbone analysis, and drive corrective and preventive actions to closure.
Improve throughput by measuring OEE and cycle time, identifying bottlenecks, leading line-balancing and changeover-reduction efforts, and quantifying capacity gains.
Implement SPC and in-line inspection for critical process parameters, and establish data collection using tool logs and MES so yield and throughput are visible by station, product, and shift.
Lead PFMEAs and control plans for new or changed processes, and qualify changes using capability studies such as Cpk and Gage R&R before production release.
Partner with equipment vendors, maintenance, and controls engineering to resolve tool issues affecting yield or uptime; support FAT/SAT and new-tool introduction as needed.
Write and maintain SOPs and work instructions; train and mentor technicians and operators.
Support daily production by troubleshooting process excursions, dispositioning nonconforming material, and responding to off-shift escalations when needed.
Apply lean and Six Sigma methods to continuous improvement across the assembly line, and champion safe handling of electrolyte and lithium-ion cells and safe dry-room operations.
Work with R&D engineers to develop processes for new products.
Maintain an active role in internal continuous improvement.
Mentor and supervise lab technicians as required.