Head of Portfolio PMO - Interim Start 1st of June, 2026Stevenage Head Office - hybrid working 1000 to 1200 per day - Inside of IR35Monthly rollingA senior leadership role within the Strategic Projects and Management Office. The postholder is accountable for establishing, leading, and continuously improving the way the change portfolio is delivered. The role ensures that robust governance, delivery frameworks, quality standards, and assurance processes are in place to enable successful delivery of projects and programmes. The role influences organisational delivery capability, providing the delivery framework, and expert support to project and programme managers. Driving consistency, transparency, and control across the change portfolio while enabling teams to deliver effectively is a key requirement. This position requires a commercially minded, proactive, and experienced technology professional. The successful candidate will have a proven track record of managing complex portfolios and be confident engaging with C Suite stakeholders. Key Responsibilities: PMO Strategy and Leadership Operate PMO function as a centre of excellence for change governance, standards, and best practice. Lead, mentor, and develop PMO teams, fostering a high-performance and service-oriented culture. Act as a senior advisor to leadership on delivery capability, governance, and performance. Governance and Control: Design, implement, and maintain a scalable governance framework across projects and pr