Peter Drennan

Under-Secretary-General for Safety and Security

Peter Drennan of Australia was nominated as Under-Secretary-General for Safety and Security, on 28 June, 2014.

Mr. Drennan, who from 2009 served as Deputy Commissioner National Security with the Australian Federal Police, brings to the position an extensive career in policing and law enforcement at the community, national and international levels. His experience in safety and security spans over 35 years with the development of strong strategic collaborative partnerships covering national and international law enforcement counter-terrorism activities, peacekeeping and post-conflict capacity building missions with both the United Nations as well as bi- and multi-lateral regional missions, notably in North Africa, the Middle East, South West and South East Asia.

Having commenced his police officer career in 1979, Mr. Drennan served in key leadership and management roles since 2002 within the Federal Police, notably as Assistant Commissioner on Counter Terrorism, Economic and Special Operations, Border and International Network as well as the Eastern Region. He has further experience as the Federal Police’s Director of Operations Eastern Region and Regional Liaison Coordinator for East and South East Asia, based in Hong Kong.

Mr. Drennan has represented Australia in national and international policing forums including INTERPOL and ASEANPOL leading international liaison relationships. He has undertaken postgraduate studies in human resource management and police executive leadership programs with the Australian Institute of Police Management as well as external programs with the Australian Graduate School of Management and Institute of Company Directors. He graduated in 2011 from the FBI National Executive Institute program.

Born in 1957, Mr. Drennan is married and has two children.


Nóirín O'Sullivan

Assistant Secretary-General for Safety and Security

Nóirín O'Sullivan of Ireland was nominated as the Assistant Secretary-General for Safety and Security, on 31 October 2018.

As deputy to the Under-Secretary-General for Safety and Security (USG/DSS), the Assistant Secretary-General is responsible for the day-to-day overall management of the Department and supporting the USG in the overall leadership and management of the Department.

Ms. O’Sullivan has over 36 years of experience in the international law enforcement and security environment and most recently held the position of Garda Commissioner of An Garda Síochána in Ireland.  Prior to that, she was the Interim Acting Commissioner of An Garda Síochána, responsible for advising the Minister of Justice and the Government of Ireland on all matters pertaining to national security and policing.  Ms. O’Sullivan began her career with An Garda Síochána in Ireland in June 1981 and progressed through the ranks, holding various operational and managerial positions since then.

Ms. O’Sullivan brings to the role her extensive experience in international safety and security management, strategic management and leadership.  She is a leader in partnership building, leading teams and able to manage complexity and to drive strategic change.  She also brings an in-depth knowledge of international security, crisis management, strategic and institutional leadership and gender issues to the position.

Born in Ireland in 1960, Ms. O’Sullivan holds a Master of Business Studies (MBS) in Strategic Management and Planning from the Michael Smurfit School of Business, University College Dublin and a Bachelor of Arts in Police Management by Garda College and University of Limerick.  She holds an Honorary Doctorate of Laws from the University of Ulster.

Ms. O’Sullivan is married and has three sons.