Sr. Pack Materials Technician II

About Rivian

Rivian is on a mission to keep the world adventurous forever. This goes for the emissions-free Electric Adventure Vehicles we build, and the curious, courageous souls we seek to attract.

As a company, we constantly challenge what's possible, never simply accepting what has always been done. We reframe old problems, seek new solutions and operate comfortably in areas that are unknown. Our backgrounds are diverse, but our team shares a love of the outdoors and a desire to protect it for future generations.

In this role, you'll support Rivian's Battery Pack technology development by preparing and characterizing various materials & components, building & assembling prototypes therefrom, testing them in advanced setups, and documenting the gathered data.

• Work in an R&D lab environment doing hands‑on activities involving lithium‑ion battery cells and related components & materials while adhering to safety practices
• Prepare samples of polymeric materials, such as adhesives, tapes, seals using precise dispense tools and equipment
• Characterize samples for mechanical, thermal, electrical, and chemical properties using lab equipment
• Preparing/following standard operating procedures (SOPs) as well as maintaining lab equipment
• Assemble battery cells, related components, and sensors into prototypes
• Build test setups with the above prototypes and various metrology/instruments to quantify the performance of various materials
• Gather and organize the collected data using standardized software, such as LabVIEW and/or proprietary instrument software, spreadsheets.
• Foster collaboration within the cross‑functional teams and contribute to Rivian's core values

• High‑school diploma with 5+ years experience, Associate's degree with 2+ year experience, or Bachelor's degree in materials, mechanical, or chemical engineering; experience preferably in lithium‑ion battery development
• Demonstrated understanding of lab safety protocols and the use of lab instruments/equipment (microscopes, thermal chambers, pumps, chillers, compressed gas cylinders, valves, temperature/pressure/strain/flow sensors)
• Record of creating and building assemblies using machined/injection‑molded/3d‑printed components
• Good understanding of general physics principles such as current, voltage, resistance, heat, pressure, flow, energy, etc.
• Excellent communication skills to enable strong collaborations within and cross‑functional teams
• Strong organizational skills to stay focused on project goals as well as the ability to adapt to a fast‑paced environment

The hourly range for this role is USD 40.67/hr.

- 50.84/hr. for California based applicants. This is the lowest to highest hourly we in good faith believe we would pay for this role at the time of this posting. An employee's position within the hourly range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, geographic location, shift, and organizational needs.

The successful candidate may be eligible for annual performance bonus.

We offer a comprehensive package of benefits for full‑time and part‑time employees, their spouse or domestic partner, and children up to age 26, including but not limited to paid vacation, paid sick leave, and a competitive portfolio of insurance benefits including life, medical, dental, vision, short‑term disability insurance, and long‑term disability insurance to eligible employees. You may also have the opportunity to participate in Rivian's 401(k) Plan and Employee Stock Purchase Program if you meet certain eligibility requirements.

Full‑time employee coverage is effective on their first day of employment. Part‑time employee coverage is effective the first of the month following 90 days of employment. More information about benefits is available at

You can apply for this role through  (or through inte if you are a current employee). This job is not expected to be closed any sooner than March 20, 2026.

Rivian is an equal opportunity employer and complies with all applicable federal, state, and local…