The Nuclear Decommissioning Authority

New Chief Executive John Clarke has made a number of organisational changes to the NDA structure to reflect the priority allocated to Sellafield.

The key feature is the appointmentof Mark Lesinski, currently Executive Director – Delivery, to the new position of Chief Operating Officer, where his focus will be overwhelmingly on Sellafield.

Supporting Mark at the Cumbrian site will be Mark Steele who is confirmed as the new Head of Programmes – Sellafield, a post he already occupies as the interim replacement for Ian Hudson.

A new post managing oversight of DSRL, Magnox/RSRL and National Programmes will be created, reporting to Mark Lesinski and headed up on an interim basis by Chief Financial Officer David Batters, in addition to his existing duties.

The post of Business Planning Director, previously held by John, will not be replaced.

Adrian Simper will remain as Strategy and Technology Director reporting to John Clarke, and take over John's responsibilities as Chair of the Shadow Board at NDA's Radioactive Waste Management Directorate (RWMD) in preparation for its creation as a separate organisation. RWMD Managing Director Bruce McKirdy will report to Adrian. Adrian will also become Chair of NDA subsidiary INS.

Sean Balmer will remain as Commercial Director and continue to have accountability for the commercial activities managed by INS on the NDA's behalf.

Martin Liefeith, as Head of Business Planning, and Rob Higgins, as Head of Legal, will report to David Batters.

David will also lead a review of how performance is measured across the estate which, when complete, may lead to some further changes in the organisational structure.

The number of Executive Directors on the Board is reduced from four to three as a result of the changes.

• More information in our people section