Sign upLog in

Sr. Thermal System Simulation Engineer

Rivian

Tustin, CA

Apply
JOB DETAILS
SALARY
$107,800–$134,800 Per Year
SKILLS
3D Modeling, Aerospace Engineering, Analysis Skills, Auditing, Background Investigation, Bridge Building, CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing), CATIA CAD, Computer Engineering, Cross-Functional, Demographics, Fluid Mechanics and Dynamics, Geometry, Hardware Design, Hardware Simulation, Heat Exchanger, Heat Transfer, Information/Data Security (InfoSec), Interpersonal Skills, Mechanical Engineering, Performance Tuning/Optimization, Powertrain, Problem Solving Skills, Propulsion, Pumps, Reference Verification, Refrigeration, Root Cause Analysis, Simulation, Social Media, Source Code/Configuration Management (SCM), Standard Operating Procedures (SOP), System Integration (SI), Systems Engineering, Technical/Engineering Design, Test Bench, Test Data, Testing, Thermal Management, Thermodynamics, Trade-Off Analysis, Vendor/Supplier Evaluation
LOCATION
Tustin, CA
POSTED
1 day ago
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.

Role Summary

Propulsion thermal system modeling is a mission-critical function at Rivian, enabling the virtual validation of propulsion cooling and refrigerant systems before physical SOP. In this role, you will lead the development of high-fidelity 1D and 3D CFD models to represent complex thermal responses at the vehicle level.

You will be responsible for bridging the gap between component-level design and vehicle-level performance, specifically for the existing and future platforms. This involves pushing the boundaries of simulation, from two-phase refrigeration CFD to 0D/1D drive-cycle system integration, to ensure our vehicles achieve industry-leading efficiency, range, and thermal reliability.

Responsibilities

  • Lead Powertrain Cooling System Modeling: Own the creation, correlation, and release of 1D thermal models (GT-Suite, Simulink) for powertrain cooling and heating loops, including pumps, valves, hoses, and heat exchangers etc.
  • Advanced CFD development: Drive high-fidelity CFD development for components and system developments, specifically targeting two-phase flow in refrigeration systems (suction lines, accumulator, manifolds etc.) and multiphase simulations (oil pick-up etc.).
  • Virtual Sign-off & DVP: Own the drive-cycle virtual validation for aggressive propulsion thermal management. Translate component design boundaries into system-level DVP plans and lead performance sign-off discussions.
  • Hardware-Simulation Integration: Collaborate deeply with hardware design engineers and suppliers to audit component performance (pump maps, HX rejection, test boundaries) and integrate physical test data from thermal chambers or wind tunnels into simulation twins.
  • Strategic Optimization: Perform trade-off analysis between conflicting engineering constraints (e.g., component energy consumption vs. cooling performance) to optimize next-generation thermal architectures.
  • Supplier & Stakeholder Management: Communicate technical requirements and simulation results across organization boundaries, acting as the bridge between DRE, system engineers and attribute leads.
  • Model Version Control: Architect and maintain a robust supplier-based component performance maps and simulation archive to enable high-speed requirement simulation for future programs.

Qualifications

  • Education: Graduate Degree (MS/PhD preferred) in Mechanical or Aerospace Engineering with a strong foundation in thermodynamics, fluid mechanics, and heat transfer.
  • System Modeling Expertise: 5+ years of experience in vehicle-level thermal simulations. Mastery of GT-Suite is required; familiarity with Simulink/Simscape is a plus.
  • CFD Proficiency: Advanced experience in single-phase and multiphase CFD (Star-CCM+ or ANSYS Fluent). Proven ability to optimize complex fluid systems through simulation.
  • Domain Knowledge: Excellent understanding of EV powertrain cooling loops, refrigeration systems, thermal components, and associated control strategies.
  • Hardware Background: Hands-on experience with Thermal Chamber, Climatic Wind Tunnel, or coolant/refrigerant bench testing is a plus.
  • Problem Solving: A proven track record of independent root cause analysis and the ability to find and push component boundaries to their limits.
  • Communication: Exceptional interpersonal skills; ability to delegate and encourage delivery from cross-functional teams and external suppliers.
  • CAD Experience: Familiarity with CATIA or ANSA for geometry extraction and simulation prep.

Pay Disclosure

Salary Range Irvine-Based Applicants: $107,800-$134,800 (actual compensation will be determined based on experience, and other factors permitted by law).

Benefits Summary: Rivian provides robust medical/Rx, dental and vision insurance packages for full-time employees, their spouse or domestic partner, and children up to age 26. 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

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.

About the Company

R

Rivian

Resume Resources

Free Resume TemplatesFree Resume Builder