The Head of SIXEP leads, directs and develops a complex sub-portfolio which may consist of a combination of operations, programme, projects and decommissioning activities to ensure safe and secure delivery to meet strategic performance outcomes, targets and realise benefits while reducing waste and maximising value for our stakeholders.
The Head of SIXEP holds full accountability for the delivery of site SIXEP capability. This strategically significant role centres on complex operational and programme integration leadership, including the delivery of business case outcomes and the effective client activities and integration of multiple major capital projects. These being the £4–9 billion new capability programme’s of SIXEP Continuity, SIXEP Retrievals, and the SIXEP Waste Treatment Project. Supported by a wider suite of enabling activities that collectively secure the site’s long‑term effluent treatment capability. The role supports strategic alignment, governance, assurance and sponsorship to ensure the collective achievement of the required SIXEP programme outcomes and future operational capacity for the continuity of the site. In parallel with this change portfolio, the postholder manages an annual programme budget of approximately £30 million. This demands rigorous prioritisation, robust financial governance and effective performance management to maintain safe, efficient and value‑driven delivery. The Head of SIXEP also leads a substantial organisational footprint, with accountability for up to 100 direct staff and a similar number indirectly through contractors and partnered delivery models. The role requires high‑quality engagement with executive, board‑level and government stakeholders, representing the programme externally, shaping strategic decisions and securing sustained long‑term support. Alongside these programme responsibilities, the postholder holds full accountability for the safe, reliable and compliant operation of the existing SIXEP plant, ensuring ongoing operational performance while balancing day‑to‑day plant demands with the delivery of transformational future capability. Manage all activities within the business area to ensure agreed performance targets are met and nuclear...
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