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. 

We are seeking a highly motivated and enthusiastic entry-level Cell Modeling Engineer to join the team. This role will focus on developing and validating performance models of electrochemical cells, with a specific emphasis on their application in battery system and control design. You will contribute to the development of accurate models that capture the transient behavior of cells under various operating conditions, enabling Rivian to achieve the following:

• Developing Robust Control Algorithms: Predicting cell behavior in real-time allows for the design of effective control strategies for temperature regulation, voltage balancing, and state-of-charge estimation.
• Optimizing Thermal Management Systems: Simulating heat generation and dissipation within cells enables the design of efficient cooling systems that prevent thermal runaway and extend cell life.
• Improving Voltage Control: Modeling voltage dynamics allows for the development of precise voltage control algorithms that enhance cell performance and prevent overcharge/overdischarge.
• Enabling Advanced Battery Management Systems (BMS): Accurate models provide the foundation for advanced BMS functionalities, such as state estimation, fault detection, and predictive maintenance.

The ideal candidate will possess a strong foundation in engineering principles, a passion for modeling and simulation, and a desire to learn and grow in a fast-paced, controls-focused environment.

• Develop cell performance models including equivalent circuit models and reduced order electrochemical-thermal models at different SOH, SOC, and temperatures.
• Analyze the test data and develop simplified models to mimic various aging/performance data sets that can be used in controls algorithms
• Develop innovative numerical techniques to improve speed and accuracy of model and guide design of experiments for optimal utilization of resources
• Work with battery systems and software engineers to integrate models in SOC, SOH, SOP algorithms software
• Work with thermal modeling engineers to integrate battery thermal behavior especially the non-uniformity in the temperature distribution within the battery pack and support improvements in the battery thermal management system.
• Work with vehicle and battery systems engineers and model to decompose vehicle level requirements to cell level requirements

• Lithium-ion battery modeling experience
• Basic understanding of electrochemistry, thermodynamics, and transport phenomena
• Familiarity with numerical modeling and optimization techniques.
• Proficiency in the following programming language Python, MATLAB, and Simulink
• Experience with simulation software (e.g., COMSOL, ANSYS) is a plus.
• Strong data analysis skills and statistical methods
• Familiarity of battery behavior charges over temperature and age of the battery

Salary Range for California Based Candidates: $85,600.00 - $107,000.00 (actual compensation will be determined based on experience, location, and other factors permitted by law).

Benefits Summary: Rivian provides robust medical/Rx, dental and vision insurance packages for full-time and part-time employees, their spouse or domestic partner, and children up to age 26. Full Time Employee coverage is effective on the first day of employment.

Equal Opportunity

Rivian is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, ancestry, sex, sexual orientation, gender, gender expression, gender identity, genetic information or characteristics, physical or mental disability, marital/domestic partner status, age, military/veteran status, medical condition, or any other characteristic protected by law.

Rivian is committed to ensuring that our hiring process is accessible for persons with disabilities. If you have a disability or limitation, such as those covered by the Americans with Disabilities Act, that requires accommodations to assist you in the search and application process, please email us at  candidateaccommodations@rivian.com .

Candidate Data Privacy

Rivian may collect, use and disclose your personal information or personal data (within the meaning of the applicable data protection laws) when you apply for employment and/or participate in our recruitment processes (“Candidate Personal Data”). This data includes contact, demographic, communications, educational, professional, employment, social media/website, network/device, recruiting system usage/interaction, security and preference information. Rivian may use your Candidate Personal Data for the purposes of (i) tracking interactions with our recruiting system; (ii) carrying out, analyzing and improving our application and recruitment process, including assessing you and your application and conducting employment, background and reference checks; (iii) establishing an employment relationship or entering into an employment contract with you; (iv) complying with our legal, regulatory and corporate governance obligations; (v) recordkeeping; (vi) ensuring network and information security and preventing fraud; and (vii) as otherwise required or permitted by applicable law.

Rivian may share your Candidate Personal Data with (i) internal personnel who have a need to know such information in order to perform their duties, including individuals on our People Team, Finance, Legal, and the team(s) with the position(s) for which you are applying; (ii) Rivian affiliates; and (iii) Rivian’s service providers, including providers of background checks, staffing services, and cloud services.

Rivian may transfer or store internationally your Candidate Personal Data, including to or in the United States, Canada, the United Kingdom, and the European Union and in the cloud, and this data may be subject to the laws and accessible to the courts, law enforcement and national security authorities of such jurisdictions. 

Please note that we are currently not accepting applications from third party application services.