He was:
- Chief of the Defence Force of Australia (2014-2018)
- Vice Chief of the Defence Force (2011-2014)
- Chief of Air Force (2008-2011).
In 2020, he was Chair of the Royal Commission into National Natural Disaster Arrangements.
He is currently:
- Chair of the Australia Pacific Security College Advisory Board
- Deputy Chair of the Sir Richard Williams Foundation on the Boards:
- Western Parkland City Authority
- Australian International Military Games (Invictus Games Sydney 2018).
- a member of the Governing Committee of the Temora Aviation Museum
- Executive Director at BAE Systems Australia
- Non-Executive Director at Nihon Cyber Defence.
As Chief of Defence, Mark successfully led the Australian Defence Force, comprising 80,000 permanent and reserve personnel, to:
- significantly improve capabilities
- responses to major global events
- championed organisational change across areas of:
- national security
- culture
- diversity
- leadership performance.
He has provided national security advice to the highest levels of governments, industry leaders and international stakeholders, and his aerospace knowledge and expertise is extensive.
Mark was previously the ADF Airworthiness Authority and has over 3,500 hours in:
- single seat fighter aircraft including the A-4G Skyhawk
- Mirage 111O
- F-16C and F/A-18 Hornet.
He continues to be active in general aviation and holds a commercial, RAAus and Remote pilot licence, and is a warbird owner.
He has completed the Harvard Business School Advanced Management Program, is a graduate of the Australian Institute of Company Directors and a Fellow of the Royal Aeronautical Society.
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