At Karman+, we’re building spacecraft systems that must operate reliably in some of the harshest environments imaginable. Our ability to design and test guidance, navigation, and control (GNC) systems depends on high-fidelity simulations that capture the complex interactions between spacecraft, environment, and control algorithms. We’re looking for a GNC Simulation Lead who can design, develop, and maintain physics simulations and component emulators that directly inform spacecraft design decisions, mission planning, and system verification. You’ll work closely with flight software, mission design, and AI&T teams to ensure our spacecraft are controllable, robust, and mission-ready. This role is perfect for a self-motivated engineer who thrives on technical depth while also enjoying collaboration, communication, and building tools that impact the entire spacecraft lifecycle. You’ll be responsible for building simulation environments that bridge physics models, control algorithms, and flight software, and flight hardware interfaces. You’ll run nominal and off-nominal scenarios, develop visualizations, and help validate vehicle performance across diverse mission profiles. Strong programming ability, comfort with numerical modeling, and an ability to communicate results clearly are essential. This is a highly cross-functional role, requiring you to work with software engineers, hardware teams, and mission designers, translating complex technical insights into actionable design recommendations.