Mechanical Engineer

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 #J-18808-Ljbffr