Senior Harness Design Engineer

Join Astranis as a Senior Harness Design Engineer, where you will be responsible for designing wire harnesses that keep our spacecraft operational in geostationary orbit. You will take harnesses from schematic capture through production release, working across low-voltage, high-voltage, and RF interconnects. This multidisciplinary role requires strong electrical design depth, mechanical literacy, and the ability to partner across nearly every part of the vehicle. You will own harness architecture and design, perform core electrical analysis, develop and maintain schematics and drawings, drive design-to-manufacturing, and support pre-launch integration and test operations.

• Ownership of the design of wire harnesses for spacecraft, from schematic capture through production release.
• Performing core electrical analysis behind reliable harnesses, including wire sizing, voltage-drop budgets, and protection coordination.
• Driving design-to-manufacturing through Zuken E3.HarnessBuilder, using automation to move cleanly from design intent to manufacturing outputs.
• We think about this role as one discipline of depth and one of literacy: electrical design is the proficiency, mechanical is the literacy
• The required qualifications reflect the electrical depth we can't teach on the job
• The mechanical and space-physics skills are where we expect strong collaboration and room to grow
• Standards fluency in IPC/WHMA-A-620 (Class 3) workmanship, plus NASA harness workmanship and connector selection and qualification practices
• Mechanical literacy, comfortable working alongside mechanical and packaging teams on 3D routing feasibility, clamp and datum definition, and harness path
• Space-environment awareness, with a working understanding of how vacuum, thermal cycling, radiation, and launch vibration and shock drive harness and insulator design decisions
• Strong electrical fundamentals, including wire and cable selection (ampacity, voltage drop, insulation ratings, shielding, bundling), protection coordination, derating, and connector and terminal selection
• Zuken E3 proficiency, with strong hands-on command of E3.cable, E3.smallcable, and E3.HarnessBuilder for schematic capture and harness engineering
• Degree in electrical, mechatronics, or a related engineering field, or equivalent hands-on harness design experience
• Hands-on electrical test equipment experience, including harness and continuity testers (e.g., Cirris), digital multimeters, and oscilloscopes
• 7+ years of harness design experience, including 2 to 3 years at the system level, owning harness architecture across a vehicle rather than designing to someone else's spec
• Documentation depth, able to generate complete harness packages (schematics, wire lists, connector face views, splice diagrams) and to dimension controlled lengths, branches, and service loops
• Zuken E3.database librarian experience, having previously owned harness library and component-data governance (this is a role you can grow into)
• Spacecraft charging expertise, familiar with surface charging, internal and deep-dielectric charging (dielectric penetration), and their effects on wire insulation, connector dielectrics, and shielding, per references such as NASA-HDBK-4002 and ECSS-E-ST-20-06
• HV design for the space environment, including corona and Paschen-law behavior from ascent to vacuum, and E-field analysis for partial discharge in HV connector qualification and selection
• RF literacy, comfortable with shielded and coax interconnects, impedance control, and shielding effectiveness sufficient to design and route RF harnesses alongside RF engineers. Familiarity with space coax and connector specifications (e.g., NASA SSQ 21653, MIL-PRF-39012, GSFC S-311-P-718) is a plus
• Test and verification, including continuity, insulation resistance, dielectric withstanding voltage, bonding resistance, and TDR
• 3D CAD proficiency in CATIA Electrical, SolidWorks, or 3DEXPERIENCE for harness routing and formboard work