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Senior Avionics Mechanical Design Engineer

Relativity Space is building the Terran R launch vehicle and the factory systems to produce it. The Avionics team owns the vehicle’s nervous system; they design, build, test, install, and operate avionics hardware. We are seeking a Senior Avionics Mechanical Design Engineer to own mechanical design, analysis, and validation of avionics enclosures, vibration isolation, thermal management, and environmental protection devices, collaborating closely with electrical, propulsion, GNC, and stage teams.

Skills

  • Proficiency in 3D CAD and 2D drafting
  • Experience with structural and thermal analysis
  • Ability to perform preliminary static and dynamic load sizing
  • Experience with rapid prototyping and test validation
  • Familiarity with electronics enclosure and PCB mechanical interfaces
  • Understanding of vibration isolation and environmental protection
  • Strong cross-functional collaboration and project ownership
  • Applied knowledge of GD&T and manufacturing considerations

Responsibilities

  • Design, analyze, and validate mechanical hardware for avionics enclosures, vibration isolation, thermal management, and environmental protection.
  • Collaborate with electrical engineers on PCB assembly packaging, mounting, routing clearances, and EMC considerations.
  • Perform preliminary sizing and analysis for static/dynamic loads and thermal environments.
  • Create detailed 3D models and 2D drawings with producibility and testability in mind.
  • Lead rapid prototyping and iterative test campaigns to qualify flight designs.
  • Drive cross-functional integration with propulsion, GNC, fluids, and stage teams to ensure system-level compatibility.

Education

  • Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, or related field
  • Advanced degree preferred but not required

Benefits

  • Competitive salary and equity
  • Generous PTO and sick leave
  • Parental leave
  • Annual learning and development stipend
  • Comprehensive benefits (medical, dental, vision) and retirement options
  • Reasonable accommodation support and inclusive workplace
To read the complete job description, please click on the ‘Apply’ button
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CEO of Relativity Space
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Tim Ellis
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Average salary estimate

$158000 / YEARLY (est.)
min
max
$138000K
$178000K

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Relativity Space seeks an Avionics Mechanical Design Engineer II in Long Beach to design, analyze, and validate mechanical avionics hardware for the Terran R vehicle.

We are building the future of aerospace. A rocket company at the core, Relativity Space is on a mission to become the next great commercial launch company. Terran R, our medium-to-heavy lift reusable launch vehicle, will reliably deliver payloads...

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FUNDING
DEPARTMENTS
SENIORITY LEVEL REQUIREMENT
TEAM SIZE
SALARY RANGE
$138,000/yr - $178,000/yr
EMPLOYMENT TYPE
Full-time, onsite
DATE POSTED
October 22, 2025
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