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Organisation information

Department of Defence - Who Does What


Secretary General

Jacqui McCrum
Secretary General of the Department of Defence

Assistant Secretary (Acting), Corporate Affairs

Ronan Mulhall
Assistant Secretary Corporate Affairs

Direct reports

Dermot Ryan
Principal Officer, Communications
Bernie Dempsey
Principal Officer, Corporate Support Branch
Tom Hussey
Principal Officer, Finance Branch
Siobhan Joyce
Principal Officer, People and Development Branch
Jarlath Loftus
Principal Officer, Finance Branch - Payroll and Pensions
Helen Feeney
Principal Officer, Internal Audit
Brigitta O'Doherty
Principal Officer, Military Aviation Authority

Assistant Secretary, Defence & Security Policy

Bernie Maguire
Assistant Secretary, Defence & Security Policy

Direct reports

Brian O'Meara
Principal Officer, International Security and Defence Policy Branch
Killian Magee
Principal Officer , National Security & Defence Policy
Billy Tuohy
Principal Officer, Legislation Branch
Lisa Hennessy
Principal Officer, Legislation Branch
Barry Conroy
Principal Officer, Permanent Representative, Brussels
Margaret Stanley
Principal Officer, Maritime Security Unit

Assistant Secretary, Strategic Change & Capability Development

Aileen Nolan
Assistant Secretary for Strategic Change & Capability Development

Direct reports

Melanie Connolly
Principal Officer, Capability Development Unit
Cathal Duffy
Principal Officer- Procurement & Acquisitions
Gráinne Guinan
Principal Officer- Procurement & Acquisitions
Fiona Lafferty
Principal Officer- Procurement & Acquisitions
Deirdre Gallagher
Principal Officer- Change Management Office
Liam Morrow
Principal Officer, ICT/Enterprise Branch
Derek Byrne
Principal Officer, ICT/Enterprise Branch
James Ryan
Principal Officer, EU Industry Engagement

Assistant Secretary, Defence Capability People Policy

Clare Tiernan
Assistant Secretary, Defence Capability People Policy

Direct reports

Carol Bourke
Principal Officer, Defence Forces Personnel Policy Branch
David Geraghty
Principal Officer, Support Services and Veteran Affairs
Eimear Lavelle
Principal Officer, Capability (People) Development & Support Branch
Jillian O'Keefe
Principal Officer, Conciliation and Arbitration Branch
Philip O'Sullivan
Principal Officer, Litigation Branch

Assistant Secretary (Acting), IRG Implementation

Stephen Hall
Assistant Secretary (Acting), Inquiries Statutory & Non Statutory

Direct reports

Jennifer Hanrahan
Principal Officer - IRG Implementation
John Doyle
Principal Officer, Inquiries, Statutory and Non Statutory
Marianne Nolan
Principal Officer, External Oversight Body

Assistant Secretary, Emergency Operations, and Infrastructure Oversight

Jason Kearney
Assistant Secretary of Emergency, Operations and Infrastructure Oversight

Direct reports

Cep Carty
Principal Officer, Civil Defence Branch
David Byrne
Principal Officer, National Operations Policy
Eoin McDonnell
Principal Officer, Property Management Branch
Kealan McMoreland
Principal Officer, Office of Emergency Planning Branch

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