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Senior Harness Design Engineer

Astranis
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San Francisco, CA$135k - $235kFull-timePosted 1mo ago

About the role

Senior Harness Design Engineer at Astranis, responsible for end-to-end harness design for spacecraft, translating electrical architecture into manufacturable, flight‑reliable harnesses validated for geostationary orbit from concept to production release.

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)
  • 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

Qualifications

  • 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
  • Zuken E3 proficiency, with strong hands-on command of E3.cable, E3.smallcable, and E3.HarnessBuilder
  • Strong electrical fundamentals (wire/cable selection, voltage drop, insulation ratings, shielding, bundling)
  • Protection coordination, derating, and connector/terminal selection
  • Standards fluency in IPC/WHMA-A-620 (Class 3) workmanship, plus NASA harness workmanship and connector practices
  • Complete harness package documentation (schematics, wire lists, connector face views, splice diagrams) and dimensioning of lengths/branches/service loops
  • Hands-on electrical test equipment experience (Cirris, multimeters, oscilloscopes)
  • Space-environment awareness (vacuum, thermal cycling, radiation, launch vibration/shock)
  • Mechanical literacy for 3D routing feasibility, clamps, and datum definition

Skills

Required:Harness designZuken E3/HarnessBuilderElectrical analysis

Benefits

  • All positions include equity and robust benefits.
  • Base pay is part of a larger compensation package including significant equity via stock options, health insurance, disability and life insurance, 401(k), flexible PTO, and on-site meals.
Last updated Oct 21, 2026. Interested? Apply on the company site.
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About Astranis

Advanced satellites for high orbits.

Astranis builds advanced satellites for high orbits, expanding humanity’s reach into the solar system. Today Astranis satellites provide dedicated, secure networks to highly-sophisticated customers across the globe— large enterprises, sovereign governments, and the US military. With five satellites on orbit and many more set to launch soon, the company is servicing a backlog of more than $1 billion of commercial contracts. Astranis is the preferred satellite communications partner for buyers with stringent requirements for uptime, data security, network visibility, and customization. Astranis has raised over $750 million from some of the world’s best investors, from Andreessen Horowitz to Blackrock, and Fidelity, and employs a team of 450 engineers and entrepreneurs. Astranis designs, builds, and operates its satellites out of its 153,000 sq. ft. headquarters in Northern California, USA.

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