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Application close date: Applications will be accepted on an ongoing basis until the requisition is closed. At Blue Origin, we envision millions of people living and working in space for the benefit of Earth. We're working to develop reusable, safe, and low-cost space vehicles and systems within a culture of safety, collaboration, and inclusion. Join our team of problem solvers as we add new chapters to the history of spaceflight! This role is part of the Lunar Permanence business unit, which develops Blue Origin's Blue Moon landers and related products. To further Blue Origin's mission of millions of people living and working in space for the benefit of Earth, we are building sustainable infrastructure for our transport of crew and cargo from Earth to the lunar surface. We are seeking aPrincipal Systems Engineerto lead system definition, technical integration, and verification execution for theMK2 Crew Lunar Lander. This role drives disciplined end-to-end systems engineering for acrewed lunar landing vehicle, spanning architecture trades, requirements/ICDs, hazard and fault management, and verification closure through integrated vehicle testing and mission readiness. You will serve as a senior technical integrator across propulsion, GN&C, avionics, comms, power, thermal, structures, software, and crew systems, ensuring the lander meets performance, safety, human-rating, and mission objectives in the lunar environment. Key Responsibilities System Architecture & Mission Integration Lead lander-level architecture trades and system budgets (mass, power, thermal, propellant, delta-V, comms link, pointing, timeline/ops). Develop and maintain vehicle-levelCONOPSfor crewed lunar descent/ascent, surface operations, and rendezvous/docking phases (as applicable). Define and manage system-level margins, performance closure, and technical decision records. Requirements, Interfaces, and Configuration Management Own system requirements decomposition, allocation, and traceability (mission vehicle subsystem component). Develop and manageICDsand interface verification for:Launch vehicle and ground processing/transportationCrew and mission systems (e.g., docking/transfer interfaces where applicable)Ground segment and mission operationsTest equipment and GSE Drive technical baseline management, change control (CCB), and requirements quality (clear, verifiable, traceable). Human-Rating, Safety, and Fault Management Lead system-levelhazard identification/closure, fault tolerance strategy, redundancy, and safe-mode/contingency design for a crewed vehicle. Guide FMEA/FMECA, FHA/SSHA support, and integrated fault management (FDIR) requirements across avionics, propulsion, and software. Ensure design and verification approach supports human-rating expectations (including rigorous verification evidence and operational controls). Verification & Validation (V&V) and Test Execution Own or co-own the landerverification plan, verification matrix, and compliance evidence strategy. Define integrated test strategy and success criteria across component, subsystem, and vehicle levels including:Propulsion testing (including cryogenic operations as applicable), pressurization, leak checksGN&C closed-loop testing / HILEMI/EMC, environmental tests (vibe/shock), thermal balance/TVACEnd-to-end mission simulations and mission readiness activities Lead anomaly triage and root-cause/corrective action closure with cross-functional teams. Cross-Functional Technical Leadership Chair/lead integration forums; resolve subsystem-to-system technical conflicts and drive closure. Mentor engineers and elevate systems engineering rigor (requirements, interface discipline, verification thinking, review readiness). Support major technical reviews and customer-facing milestones (SRR/PDR/CDR/T