HawkEye 360 is seeking a Principal Systems Engineer to join the Systems Engineering Team to lead satellite systems engineering efforts supporting HawkEye 360's next-generation RF collection payloads and commercial constellation. This includes spacecraft systems engineering, constellation planning, end-to-end system architecture, and supporting business development initiatives. In this strategic role, you will ensure key company mission and customer objectives are translated into clear, verifiable technical requirements and flowed down into the technical solution across spacecraft platforms. You will collaborate across engineering, business development, and mission teams to influence space platform architecture, design, testing, and operations - ensuring all systems meet rigorous performance and operational requirements. You will provide technical oversight to vendors and suppliers, driving the successful delivery of future satellite clusters aligned with HawkEye 360's strategic goals.