Staff Manufacturing Process Engineer - Battery Cell Assembly

Amprius Technologies, Inc.•Fremont, CA

1d•$96,140 - $155,770•Onsite

About The Position

Amprius Technologies is hiring a hands-on Staff Manufacturing Process Engineer for 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—and will be based on experience. The role will support 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 reflected in line output. The position works closely with production, equipment vendors, maintenance, controls engineering, and R&D, and includes mentoring and supervising technicians as required. The role is on-site in Fremont, primarily on the production floor and in a 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 salary range is $96,140 to $155,770, with the base salary determined by knowledge, experience, and education.

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 through implementation and sustained results.
Proficiency with DOE and statistical analysis using JMP, Minitab, or equivalent, as well as 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.
Initiative, ability to work with minimal supervision and own critical projects, and ability to collaborate 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.
Ability to work daily in a dry room and on the production floor, and commitment to environmental, health, and safety requirements.
Ability to lift up to 25 pounds at a time.

Nice To Haves

Advanced degree.
Pouch-cell assembly experience or 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 by developing recipes, defining and qualifying process windows, and maintaining process specifications and control plans.
Design and run structured experiments (DOE) to optimize parameters for yield, cycle time, and cell performance, and 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, 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 through tool logs and MES to make yield and throughput visible by station, product, and shift.
Lead PFMEAs and control plans for new or changed processes, and qualify changes with 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.