The process for selecting his successor, as CIO for DWP, will begin immediately. The Cabinet Office will run a separate process for the next Government CIO along with the process that is already underway to replace Bill McCluggage, the Deputy Government CIO.
Worth noting the comments from Tony Collins:
Joe Harley has achieved much within the DWP – including cutting costs and helping to set up the administration, based on agile principles, of Universal Credit. But it was always going to be difficult combining a full-time job as DWP CIO with that of Government CIO. Harley’s retirement gives the government a chance to appoint a full-time CIO who is passionate about structural change and can build a strong public profile on the need for it.