Senior Thermofluids Systems Engineer, Power Conversion

Radiant Industries•El Segundo, CA

16h•$158,000 - $219,450•Onsite

About The Position

Radiant is seeking a Senior Thermofluids Systems Engineer, Power Conversion to own system-level thermodynamic modeling of our power conversion architecture. This architecture converts heat from nuclear fission into electricity for the customer. You will define operating points that balance system performance and constraints, deliver clear boundary conditions for the teams building fluid systems and turbomachinery, and serve as the primary technical bridge into control systems engineering & reactor modelling teams. This role is critical to delivering the first new commercial reactor design in over 50 years.

Requirements

Bachelor's degree in Mechanical, Aerospace, Chemical, or Systems Engineering from an accredited institution.
5+ years of experience in thermodynamic/power cycle modeling, systems engineering, or performance engineering, including requirements development and system-level verification.
Strong working knowledge of thermodynamics and fluid dynamics as applied to power generation cycle design.
Proficiency in system modeling tools such as MATLAB, Simulink, or Python for performance and simulation analysis.
Strong first-principles analytical skills, with the ability to manage competing priorities and communicate program status clearly.

Nice To Haves

Experience with fluid system architecture, including piping, compressors, valves, and heat exchangers.
Experience supporting control scheme development for thermal or power generation plants.
Familiarity with process piping and pressure vessel codes such as ASME B31.3, BPVC Section VIII, and BPVC Section III.
Experience with turbomachinery performance modeling or heat rejection system design (e.g., cooling towers, air-cooled condensers).
Experience supporting hardware build, assembly, and test in a production or development environment.
Prior experience with FMEA and formal risk management processes.
Nuclear industry experience is a plus but not required.

Responsibilities

Own system-level thermodynamic performance modeling of the power conversion architecture, including design and off-design operating points across startup, shutdown, transients, and off-nominal conditions.
Develop and maintain interface requirements and boundary conditions (pressures, temperatures, flow rates, control signals) for fluid system components, pressure equipment, turbomachinery, and power electronics.
Work with engineers owning hardware and subsystems to develop architectural changes accommodating nominal and off-nominal operation, driving trades across performance, cost, weight, schedule, and safety.
Serve as the primary interface to control systems engineering, providing plant-level dynamic behavior models, operating envelopes, and control-relevant boundary conditions for reactor control scheme development.
Build and maintain performance models (e.g., MATLAB, Python, Simulink) characterizing fluid system behavior across all operating states.
Lead root-cause analysis for cycle performance anomalies, correlating test data with system models to inform engineers owning hardware components.
Perform or review trade studies to optimize cycle and fluid system architecture against program requirements.
Own system-level risk analysis (FMEA) for fluid subsystems and cycle performance.
Communicate clearly with both technical and non-technical audiences across multidisciplinary teams.

Benefits

Substantial incentive stock plan for all full-time employees.
100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
Sponsored memberships for employees and their dependents.
100% top tier plan coverage + 50% for dependents.
100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.