Mechanical Engineer (Spacecraft Structures & Missions)

• Muon seeks a Mechanical Engineer to join our Spacecraft Structures & Missions team — the group that tailors Muon’s spacecraft platforms to specific customer missions. In this role you’ll own the mechanical execution of a mission end-to-end: starting from our platform building blocks, designing payload accommodations and mission-specific components, and carrying the spacecraft through integration, environmental test, and delivery to the launch vehicle
• You’ll work alongside the team’s senior and staff engineers and partner closely with Muon’s dedicated structural and thermal analysis groups, with plenty of room to grow your ownership over time
• Own the mechanical execution of an assigned mission end-to-end — from requirements through design, build, integration, and environmental test — with support from senior engineers
• Tailor Muon’s platform components to mission needs and design new mission-specific components and payload accommodations
• Create and manage spacecraft-level mechanical assemblies in SolidWorks, including envelopes, interfaces, and configuration control
• Perform first-order structural and thermal sizing to guide your designs, partnering with Muon’s dedicated structural and thermal analysis groups for detailed analysis
• Produce and release engineering documentation: drawings, GD&T, BOMs, and tolerance/mass budgets through ECO/DCO processes
• Support environmental test campaigns (vibration, TVAC) and spacecraft integration alongside production and test teams
• Write build procedures and support hardware assembly and integration on the floor
• Present your work in design reviews (PDR, CDR, MRR) and coordinate across systems, thermal, avionics, and payload teams

Benefits

• 100% health, dental, and vision coverage for employees; 50% coverage for dependents (Concierge Medical offered through One Medical where available)
• Parental leave for primary and secondary caregivers
• Generous time off policy
• 401(k) plan through Betterment and equity management through Carta
• Fully stocked kitchen at our HQ and we cater lunch 3 days per week
• Dog-friendly office- Proficiency in CAD for medium-to-large assembly design and management (SolidWorks preferred)
• A strong desire to learn and contribute in a fast-paced, dynamic environment
• B.S. or higher in Mechanical Engineering or related field
• Excellent communication and cross-functional coordination skills
• 5+ years of experience designing, building, and testing mechanical hardware for complex systems
• Solid command of drawings, GD&T, BOMs, and tolerance/mass budgets
• Experience taking hardware from concept through build and test
• Structural analysis fundamentals: hand calculations, margin assessment, and familiarity with FEA
• We encourage you to apply, even if you don’t check all the boxes, and we look forward to reviewing your application!
• Space industry experience — spacecraft, launch vehicles, or flight hardware
• Experience running or supporting environmental test campaigns (vibration, TVAC)
• Hands-on FEA experience (FEMAP/NASTRAN, ANSYS, or similar)
• Experience with PLM systems and formal change control
• Experience with deployable hardware or precision mechanisms
• Software skills in Python, MATLAB, or similar