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)
  • Alastair Groom (Interim Financial Director)
  • Lucy Bogue (Chief of Staff)
  • John McGowan (Director of Project and Programme Delivery)
  • Jacqui Rock (Commercial Director)
  • Major General Nick Cavanagh (Director of Strategic Asset Planning and Programming)
  • Richard McKinney (Acting Director of Service Delivery)
  • Nik Doyle (Director of Transformation and Change)
  • James Colman (Head of Strategic Stakeholder Engagement and Communications)
  • Helen Hall (HR Director)

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

Corporate information

Access our information

Jobs and contracts