The Secretary General of the Department of Defence is Maurice Quinn.
The Department is organised in four Divisions, each of which is headed by an Assistant Secretary or Director who also oversees governance of the Department
- Des Dowling Strategic Planning, Capability-Development
and Corporate Support Divisions
- Ciarán Murphy International / Legislation Division
- Robert Mooney Defence Capability regarding People Division
- Clare Tiernan Operations Division
Further information on the allocation of management responsibilities can be found at whodoeswhat.gov.ie
A list of the people who are Designated Public Officials for the purposes of the Regulation of Lobbying Act may be viewed here.