Mechanical Engineer, Electrical Integration

Radiant Industries•El Segundo, CA

3d•$124,500 - $172,725•Onsite

About The Position

Radiant is seeking a Mechanical Engineer to support the design and integration of electrical components and subsystems in a fast-paced startup environment. The role works alongside mechanical and electrical engineers on packaging, thermal management, structural design, and system integration for advanced hardware, with hands-on involvement in development from CAD and analysis through build, test, and validation. The position is 100% onsite at Radiant’s El Segundo headquarters, and may require extended hours and weekends as necessary.

Requirements

Bachelor’s degree in Mechanical Engineering or a closely related field from an accredited institution.
At least 3 years of professional, hands-on mechanical design experience.
Experience using Siemens NX or similar 3D CAD tools.
Familiarity with mechanical design of electrical assemblies, including enclosures, brackets, and harness-routing principles.
Basic understanding of structural mechanics, load paths, and first-order stress calculations.
Knowledge of thermal analysis, heat transfer, and thermal-management concepts.
Ability to read and create mechanical drawings, including dimensions and tolerances.
Strong communication skills and ability to collaborate in a multidisciplinary engineering environment.
Must be willing to work extended hours and weekends as necessary.
Must work 100% onsite at the El Segundo headquarters.
Any job offer is contingent on the applicant’s capacity to serve in compliance with U.S. export controls.

Nice To Haves

At least 5 years of professional, hands-on mechanical design experience.
Mechanical design experience in high-reliability or harsh environments such as nuclear, aerospace, defense, or industrial settings, including thermal cycling, shock, vibration, or radiation exposure.
Experience with FEA or CFD tools for structural and thermal analysis beyond first-order hand calculations.
Hands-on experience supporting build, integration, and testing on the floor, including design iteration based on manufacturing feedback.

Responsibilities

Support mechanical design and ownership of electrical components and subsystems, including control panels, enclosures, brackets, mounts, and supports.
Route and retain cables and wiring harnesses while considering strain relief, bend-radius compliance, and serviceability.
Package sensors, actuators, connectors, and electrical hardware within constrained assemblies.
Create 3D CAD models and 2D drawings using Siemens NX, including tolerance stack-ups and basic GD&T.
Perform first-order static, shock, and vibration load calculations to support structural design decisions.
Conduct thermal analysis and heat-transfer assessments for electrical components, enclosures, and assemblies.
Support selection of materials, fasteners, and finishes to meet electrical, thermal, and environmental requirements.
Participate in system integration, troubleshooting, and validation with electrical and systems engineers.
Collect and interpret technical requirements and provide constructive feedback across mechanical, electrical, software, and systems disciplines.
Perform trade studies and first-order analyses to evaluate design options and constraints.
Generate and maintain design documentation supporting design for manufacturing, assembly, and serviceability.
Support subassembly design, coordinate with manufacturing, and assist with build and test schedules.

Benefits

Substantial incentive stock plan for full-time employees.
Medical coverage up to the base silver-level plan at 100% for the employee and 50% for dependents, with plans up to Platinum available.
Sponsored One Medical memberships for employees and their dependents.
Vision coverage at 100% for the top-tier plan and 50% for dependents.
Dental coverage at 100% for the top-tier plan, with orthodontia extra and 50% coverage for dependents.
Voluntary life, accident, hospital, and critical illness coverage, plus commuter benefits and FSA/HSA options, offered as employee-contributed benefits.
Eight weeks of paid parental leave for all parents, with additional paid pregnancy leave for California employees.
Eligible employees may participate in a fully covered Nuclear Engineering Certificate Program with Penn State University.
Daily catered lunch, free snacks, and drinks.
Flexible PTO policy and remote-workday allocation.
Company and team-bonding events and happy hours.