Senior Harness Design Engineer

Astranis builds advanced satellites for high orbits, expanding humanity's reach into the solar system.

As a Senior Harness Design Engineer at Astranis, you will own the design of the wire harnesses that keep our spacecraft alive on orbit, translating electrical architecture into manufacturable, flight-reliable harness designs built to survive launch and the full mission life in geostationary orbit.

Responsibilities

• Own harness architecture and design from concept and schematic capture through drawing packages and production release
• Perform the core electrical analysis behind reliable harnesses: wire sizing, voltage-drop budgets, protection and fuse coordination, derating, and connector/component selection
• Develop and maintain schematics, harness drawings, wire lists, splice diagrams, and connector face views using the Zuken E3 suite
• Drive design-to-manufacturing through Zuken E3.HarnessBuilder, using automation to move cleanly from design intent to manufacturing outputs
• Define and dimension controlled harness lengths, branch and breakout tolerances, and service-loop allowances on 2D drawings
• Define routing intent, grounding and bonding strategy, and shielding architecture across LV, HV, and RF interconnects within tightly constrained spacecraft volumes
• Audit wire diagrams and harness topologies for accuracy against interface control documents (ICDs)
• Specify physical protection and support for harnesses, including lacing, tying, convolute, and thermal/abrasion protection appropriate to the space environment
• Build, modify, and validate prototype and test harnesses
• Support pre-launch integration and test operations on the ground, including on-vehicle harness routing, installation, and connection
• Partner across subsystems (avionics, power, propulsion, payload) and functions (production, environmental test, and vehicle test), since the harness interfaces with nearly every part of the spacecraft
• Lead root-cause analysis and implement design improvements that enhance reliability, manufacturability, and serviceability
• Collaborate with manufacturing and harness suppliers on DFM/DFI feedback, assembly documentation, and process validation

Requirements

• Degree in electrical, mechatronics, or a related engineering field, or equivalent hands-on harness design experience
• 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
• Zuken E3 proficiency, with strong hands-on command of E3.cable, E3.smallcable, and E3.HarnessBuilder for schematic capture and harness engineering
• Strong electrical fundamentals, including wire and cable selection (ampacity, voltage drop, insulation ratings, shielding, bundling), protection coordination, derating, and connector and terminal selection
• Standards fluency in IPC/WHMA-A-620 (Class 3) workmanship, plus NASA harness workmanship and connector selection and qualification practices
• 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
• Hands-on electrical test equipment experience, including harness and continuity testers (e.g., Cirris), digital multimeters, and oscilloscopes
• Space-environment awareness, with a working understanding of how vacuum, thermal cycling, radiation, and launch vibration and shock drive harness and insulator design decisions
• Mechanical literacy, comfortable working alongside mechanical and packaging teams on 3D routing feasibility, clamp and datum definition, and harness path

Benefits

• Base salary: $135,000-$235,000 USD
• Significant equity package via incentive stock options
• High-quality company-subsidized healthcare, disability and life insurance
• 401(k) retirement planning
• Flexible PTO
• Free on-site catered meals