Role Overview

Join Rivian as a Sr. Battery Cell Modeling Engineer in Tustin, California, and drive the future of electric adventure vehicles. Rivian is pioneering emissions-free EVs designed for the outdoors, and this key technical role within the Battery Cell Engineering team advances our cell-level reduced-order modeling capabilities. You'll link cell testing data and physical modeling to critical program decisions, influencing cell development, pack thermal management, BMS algorithms, and vehicle performance. Be part of a team that challenges the status quo, reframing problems and innovating in uncharted territories to protect the planet for future generations.

Key Responsibilities at Rivian

As a Sr. Battery Cell Modeling Engineer, you'll lead transformative work in battery technology. Here's what you'll do daily:

• Lead the development and validation of performance models for battery cells, emphasizing applications in battery system and control design.
• Contribute to accurate models capturing transient cell behavior under diverse operating conditions for robust control algorithms, thermal optimization, voltage control, and advanced BMS.
• Develop cell performance models including equivalent circuit models and reduced-order electrochemical-thermal models at varying SOH, SOC, and temperatures.
• Analyze test data to create simplified models mimicking aging and performance datasets for use in control algorithms.
• Innovate numerical techniques to boost model speed and accuracy while guiding efficient experiment designs.
• Collaborate with battery systems and software engineers to integrate models into SOC, SOH, and SOP algorithms.
• Work with thermal modeling engineers on battery thermal behavior, addressing non-uniform temperature distribution in packs and enhancing thermal management systems.
• Partner with vehicle and battery systems engineers to decompose vehicle-level requirements into cell-level specs.
• Drive cross-functional workflows, ensuring modeling results inform decisions across cell development, pack thermal, BMS, and vehicle performance teams.

This role demands hands-on leadership in a fast-paced EV innovation environment at Rivian.

Qualifications & Requirements

To excel as Rivian's Sr. Battery Cell Modeling Engineer, bring these credentials:

• Education: M.S. in applied mathematics, physics, mechanical engineering, chemical engineering, or closely related field; PhD strongly preferred.
• Experience: 5+ years in modeling and simulation of complex physical systems, with significant lithium-ion battery background.
• Technical Expertise: Deep knowledge of reduced-order battery modeling (equivalent circuit, advanced fitting/optimization), lithium-ion principles (charge transport, kinetics, heat generation, cell design impacts on performance/safety/lifetime).
• Practical Skills: Familiarity with battery test methods, instrumentation, data acquisition, and analysis.
• Soft Skills: Excellent communication to align cross-functional teams on complex technical topics.
• Bonus: Experience in MATLAB/Simulink, Python, or finite element tools for battery simulations.

If you thrive in ambiguous, high-impact settings, Rivian is your launchpad.

Salary & Benefits

Rivian offers a competitive salary range of USD 107,800 - 134,800 for California-based Sr. Battery Cell Modeling Engineer applicants, adjusted by experience, skills, and location. Beyond base pay:

• Annual performance bonuses.
• Equity awards.
• Paid vacation and sick leave.
• Full medical, dental, vision coverage.
• Life, short-term, and long-term disability insurance.
• 401(k) Plan and Employee Stock Purchase Program.
• Comprehensive benefits for employees, spouses/partners, and children up to 26.

This package supports your adventure while building the future of EVs.

Why Join Rivian?

Rivian isn't just building electric vehicles; we're accelerating the shift to sustainable adventure. Our diverse team shares a passion for the outdoors and innovation. As a Sr. Battery Cell Modeling Engineer in Tustin, CA, you'll work on cutting-edge battery tech that powers R1T trucks and R1S SUVs, influencing real-world performance. Enjoy a collaborative culture that values courage, curiosity, and environmental stewardship. With rapid growth, your impact will shape EV industry standards. Tustin's vibrant location offers proximity to beaches, mountains, and tech hubs—perfect for outdoor lovers. Join us to keep the world adventurous forever.

Rivian's mission-driven environment provides unparalleled opportunities for growth in battery modeling, EV engineering, and sustainable tech. Network with top talent, access state-of-the-art labs, and contribute to breakthroughs in lithium-ion tech, thermal management, and BMS. Your models will optimize Rivian's next-gen packs, preventing thermal runaway, enhancing range, and enabling predictive maintenance. Be at the forefront of the EV revolution.

How to Apply

Ready to power Rivian's battery innovations? Apply now for the Sr. Battery Cell Modeling Engineer role in Tustin, California. Submit your resume highlighting battery modeling experience, lithium-ion expertise, and cross-functional successes. Include a cover letter explaining your passion for EVs and Rivian's mission. We're hiring fast—don't miss your chance to join a leader in electric adventure vehicles. Positions fill quickly; apply today via our careers portal. Rivian is an equal opportunity employer committed to diversity.

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