Infleqtion is a leader in atom-based quantum technology - the most scalable and commercially viable platform for quantum. We develop quantum information processing systems, precision timekeeping, and quantum sensing solutions. With offices in Boulder, CO; Madison, WI; Chicago, IL; Oxford, UK; and Melbourne, AU, we operate globally to drive innovation in quantum technology. As a deep-tech startup, Infleqtion embraces a results-driven, fast-paced, and customer-focused approach to innovation.  We seek an experienced Senior Systems Engineer to support the execution of multidisciplinary government and commercial R&D projects within our Emerging Technologies portfolio. This role will require critical contributions and support to quantum gravity and radiofrequency sensing solutions. LOCATION This position is a full-time position located in our Louisville, CO office JOB RESPONSIBILITIES The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all the following duties. Additional duties may also arise. * Work with internal teams and customers throughout multiple programs to develop and manage system architectures, subsystem functions, and interface requirements for quantum technology platforms-such as sensors, clocks, and control systems * Establish standardized system engineering practices and processes to support programs ranging from deep technology R&D to early product development * Work with team members across the company to refine and update our Product Lifecycle (PLC) policy and workflows to optimize efficiency and process value * Ensure uniform application of systems engineering tools (e.g. Jama) and methods across projects * For selected key R&D projects: * Define scope of internal PLC and associated list of deliverables * Support and track execution of tasks and deliverables through the phases of the PLC * Prepare and support gate reviews with project team * Provide systems engineering expertise for selected key projects * Create core systems engineering documents (requirements, interface control, architecture, test plans, etc.) * Work with multi-functional teams to maintain system configuration and documentation