Mechanical Engineer, Fluid Systems - 2026 New Graduate Hardware

Front Door Defense; El Segundo (CA); On-site; USD 105,000 - 125,000; Full time

Job summary

jobs.frontdoordefense.com - Jobboard is seeking a Mechanical Engineer, Fluid Systems, for their location in El Segundo, California. This role focuses on the design and production ramp of Kaleidos fluid systems. The ideal candidate will have a Bachelor's degree in relevant engineering fields and experience with fluid system architecture and testing.

The compensation ranges from $105,000 to $125,000 per year, and the position is essential for owning the engineering of critical fluid systems, including the analysis and development of subsystems.

Qualifications

• Bachelor's degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering.
• Experience with fluid system architecture design.
• Experience in designing, building, and testing fluids systems.
• Proficient knowledge in fluid dynamics and thermodynamics.
• Proficient knowledge of heat exchanger design and analysis methods.

Responsibilities

• Help own end-to-end engineering of fluid systems and components.
• Perform thermal and fluids analysis to drive design decisions.
• Develop and execute manufacturing/assembly instructions and test plans.
• Create and manage a Bill-Of-Materials (BOM).
• Own risk analysis (FMEA) for subsystems.

Skills

Fluid system architecture design

Designing, building, and testing fluids systems

Fluid dynamics and thermodynamics

Heat exchanger design and analysis methods

Education

Bachelor's degree in Mechanical, Materials, Aeronautical, Civil or Structural Engineering

Tools

Matlab

Python

Job description

Mechanical Engineer, Fluid Systems - 2026 New Graduate

Own the end-to-end design and production ramp of Kaleidos fluid systems

Location: El Segundo, California, United States

Compensation: $105,000 - 125,000 USD / year

Job Tags: Hardware

About The Role

Radiant is seeking a highly motivated Mechanical Engineer, Fluids Systems to help own critical Kaleidos fluid systems from preliminary design through build and production. These systems include the primary loop subsystems and power conversion loop, serving to convert heat from the reactor core into electrical power. You will be responsible for the following:

Responsibilities & Duties:

• Help own end-to-end engineering of fluid systems and components, including compressors, valves, and heat exchangers.
• Perform thermal and fluids analysis to drive design decisions, verify system performance, and ensure structural integrity using first-principle hand calculations and finite element tools.
• Perform trade studies to optimize system and meet program requirements.
• Develop and execute manufacturing/assembly instructions and test plans.
• Create and manage a Bill-Of-Materials (BOM).
• Find and develop suppliers for all components.
• Own subassembly design, manufacturing, and test schedules.
• Own risk analysis (FMEA) for subsystems.
• Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication.

Required Qualifications & Skills:

• Bachelor's degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering.
• Experience with fluid system architecture design.
• Experience in designing, building, and testing fluids systems.
• Proficient knowledge in fluid dynamics and thermodynamics.
• Proficient knowledge of heat exchanger design and analysis methods.

Desired Qualifications & Skills:

• Knowledge of thermodynamic power cycles.
• Prior experience with fluid system modeling via Matlab/Python.
• Experienced in design for manufacturability and ramping up hardware build in a production environment.
• Experienced in designing and operating test stands.
• Takes extreme ownership of work and a high degree of responsibility.
• Excellent communication across multidisciplinary teams.
• Prior nuclear experience in not required for this role.