This is a full-time, permanent position for a Senior Business Systems Analyst in a hybrid working model, requiring on-site attendance at least three days per week in Milton Keynes. In this role, you will be a key contributor to a large-scale managed services program, leading business analysis initiatives that drive operational excellence and enable future modernisation for our long-standing, prestigious client. You will work on complex, high-impact projects, collaborating with client teams, internal cross-functional groups, and senior stakeholders to design and deliver solutions aligned with strategic objectives. This is an excellent opportunity for a professional who thrives in dynamic environments and is passionate about enhancing processes and systems in mission-critical settings. Candidates must be eligible to obtain UK Security Clearance and therefore must have at least three years of UK residence. Key Responsibilities Deliver expert Business Systems Analysis support on complex projects with significant business impact. Participate in business strategy and portfolio-level discussions, providing insights and recommendations. Act as a consultative partner to peers, business stakeholders, and technical teams in planning and execution. Conduct end-to-end business assessments, ensuring comprehensive coverage of process and technical requirements. Analyse and document impacts of change requests across multiple functions and systems. Ensure proposed solutions address cost, ris