About us

The Defence Infrastructure Organisation (DIO) plays a vital role in supporting our armed forces by building, maintaining and servicing the infrastructure needed to support defence.


We are responsible for enabling defence people to live, work, train and deploy at home and overseas.

Our vision is to equip defence with a significantly smaller, more efficient, better quality estate.

Watch the video below explaining what we do or see 'DIO on a page' (PDF, 9.83MB) in our rich picture illustration.

DIO: what we do


DIO’s priorities are:

Who we are

We are led by Chief Executive Graham Dalton.

He is supported by an executive management team comprising:

  • Geoff Robson (Chief Operating Officer)
  • Kate Harrison (Financial Director)
  • Lucy Bogue (Chief of Staff)
  • David Marsh (Director of Major Programmes)
  • Jacqui Rock (Commercial Director)
  • Major General Nick Cavanagh (Director of Strategy and Planning)
  • Nik Doyle (Director of Transformation and Change)
  • Emma Reynolds (Head of Corporate Communications)
  • Helen Hall (HR Director)

Find out more about DIO by reading our Inside DIO blog.

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