Location: Tucson, AZ
Cap-Exempt H-1B Position — No lottery required
**Posting Number** req25611 **Department** Space 4 Center **Department Website Link** https://s4.arizona.edu/ **Location** Tucson Campus **Address** Tucson, AZ USA **Position Highlights** The Space4 Center at the University of Arizona seeks a Postdoctoral Research Associate II to conduct advanced research in Space Situational/Domain Awareness (SSA/SDA), with emphasis on nonlinear state estimation, multi-target tracking, and autonomous guidance, navigation, and control (GNC) systems. The successful candidate will develop and validate Bayesian and non-Gaussian estimation algorithms, data assimilation methods, and tracking frameworks for space and hypersonic applications, integrating heterogeneous sensor data (EO, radar, IMU, LiDAR) into robust orbit determination and relative navigation pipelines. The position spans theoretical algorithm development, high-fidelity simulation, and end-to-end system implementation, with transition to mission-relevant applications. The postdoc will publish in leading journals, collaborate with government and industry partners, and contribute to proposals aligned with Space4 programs. *Outstanding U of A benefits include health, dental, vision, and life insurance; paid vacation, sick leave, and holidays; U of A/ASU/NAU tuition reduction for the employee and qualified family members; access to U of A recreation and cultural activities; and more!* The University of Arizona has been recognized for our innovative work-life programs. **Duties & Responsibilities** - Design and implement nonlinear, non-Gaussian state estimation and multi-target tracking algorithms (e.g., Kalman/particle filters, Gaussian mixture filters, random finite set methods, MCMC-based approaches) for SSA/SDA and aerospace applications. Develop novel Bayesian frameworks for orbit determination, relative navigation, and maneuvering target tracking under uncertainty. - Develop and integrate estimation algorithms within closed-loop GNC systems for space and hypersonic applica