Mechanical Engineer (Rotary Actuators) - Space Solar

starpath.space; Hawthorne (CA); On-site; USD 90,000 - 140,000; Full time

Benefits offered by this job

Health benefits

Retirement plans

Paid time off

Job summary

Starpath seeks a Mechanical Engineer focused on rotary actuators to design, analyze, and qualify mechanisms for space solar arrays. You will own components from concept to flight, selecting motors, gearheads, bearings, and sensors, and coordinating with electrical teams for closed-loop control.

The role requires hands-on design and testing, experience with 3D CAD, GD&T, and tribology in vacuum and radiation environments. Occasional travel and a mission-driven culture await.

Qualifications

• Bachelor's or advanced degree in mechanical, aerospace, or a related engineering discipline.
• 1+ years of mechanism, actuator, or precision mechanical design experience (internship and academic experience applicable)
• Proficiency with 3D CAD and the ability to produce detailed engineering drawings with GD&T

Responsibilities

• Own rotary actuator designs from concept through design, build, test, and flight.
• Select and integrate motors, gearheads, bearings, slip rings, and sensors; size drivetrains for torque, speed, and life.
• Perform mechanism analysis—torque margin, friction budgets, stiffness, backlash, life; verify via hand calculations and FEA.
• Specify lubrication, materials, surface treatments for vacuum, thermal cycling, and radiation; manage tribology and wear.
• Design and execute mechanism qualification and acceptance testing—functional, life, vibration, thermal-vacuum, torque-margin.
• Collaborate with electrical, controls, and avionics teams on motor drive electronics and closed-loop control.
• Work with manufacturing to design for assembly, alignment, and high-rate production of precision rotating hardware.

Skills

Mechanism design

Actuator design

FEA

Thermal-vacuum

Tribology

CAD

Education

Bachelor's or advanced degree in mechanical or aerospace engineering

Tools

3D CAD

Job description

Position Details:

• Location: Los Angeles (Hawthorne), CA

• Employment Type: Full-time

• Department: Starlight Solar

• Travel: Occasional

The Mission

Starpath develops and manufactures the technologies that will enable humans to live on the Moon and Mars. Today, we are building robotic systems that locally produce the essential commodities a lunar civilization will require at extreme scale: water, power, and oxygen. Our ultimate goal is to build and operate a self-sustaining city on Mars.

Mechanical Engineer (Rotary Actuators) - Space Solar

The Starlight team is focused on dramatically improving space solar power to support Starpath's core mission and the greater space economy. Starlight manufactures the lowest cost and highest performance space solar ever, which will power the majority of new satellites built on Earth and all of Starpath's equipment on the Moon and Mars.

As a Mechanical Engineer focused on rotary actuators, you will design, analyze, and qualify the rotating mechanisms that deploy and orient Starlight's solar arrays — solar array drive assemblies, deployment hinges, latches, and gimbals — that must operate flawlessly through launch, deployment, and years of continuous motion in the space environment.

Responsibilities:

• Own rotary actuator designs from concept through detailed design, analysis, build, test, and flight — including solar array drive assemblies (SADAs), deployment hinges, dampers, latches, and gimbals

• Select and integrate motors, gearheads, bearings, slip rings, and position sensors; size drivetrains for required torque, speed, lifetime, and backlash

• Perform mechanism analysis — torque margin, friction budgets, stiffness, backlash, jitter, and life — and verify performance against requirements through hand calculations and FEA

• Specify lubrication, materials, and surface treatments suited to vacuum, thermal cycling, and radiation; manage tribology and wear over mission life

• Design and execute mechanism qualification and acceptance testing — functional, life, vibration, shock, thermal-vacuum, and torque-margin testing

• Partner closely with electrical, controls, and avionics teams on motor drive electronics, feedback sensing, and closed-loop control of actuators

• Work with manufacturing to design for assembly, alignment, and rate production of precision rotating hardware

• Push back on unnecessary complexity — simplify mechanisms, reduce part count, and cut overhead wherever it doesn't add value

Required Qualifications:

• Bachelor's or advanced degree in mechanical, aerospace, or a related engineering discipline

• 1+ years of mechanism, actuator, or precision mechanical design experience (internship and academic experience applicable)

• Proficiency with 3D CAD and the ability to produce detailed engineering drawings with GD&T

Preferred Qualifications:

• Master's degree in an engineering discipline

• Hands-on experience designing rotary mechanisms — actuators, gearboxes, gimbals, hinges, or drive assemblies — for flight or other high-reliability applications

• Proficiency selecting and integrating brushless DC motors, harmonic drives, planetary gearheads, and precision bearings

• Familiarity with space-rated tribology — dry-film and wet lubricants, bearing preload, and life testing under vacuum and thermal cycling

• Experience with slip rings, twist capsules, or other rotary power/signal transfer devices

• Working knowledge of motor drive electronics, encoders/resolvers, and closed-loop position or velocity control

• Experience executing mechanism qualification campaigns — life test, thermal-vacuum, vibration, and shock — and correlating results to analysis

• Familiarity with aerospace mechanism standards and practices (e.g., NASA-STD-5017, AIAA mechanisms guidance)

• Exposure to solar array deployment systems, SADAs, antenna pointing mechanisms, or similar spacecraft mechanisms

• Exposure to aerospace, space, or other high-reliability hardware environments

EAR Requirements:

• To conform to U.S. Government export regulations, you must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.

Equal Opportunity:

• Starpath is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Benefits:

At Starpath Robotics, base pay is just one part of your total rewards package. We also offer:

• Generous benefits including health, dental, vision, and retirement plans.

• Paid time off, holidays, and flexible policies to support balance.

• Professional growth opportunities through training and development.

• The chance to own high-impact work that directly shapes the future of robotics & space!

• A collaborative, mission-driven culture where craftsmanship and innovation are celebrated.