The Australian Cyber Security Centre (ACSC) leads the Australian Government’s efforts to improve cyber security. Our role is to help make Australia the safest place to connect online.
We monitor cyber threats across the globe 24 hours a day, seven days a week so we can alert Australians early on what to do.
We provide advice and information about how to protect yourself and your business online. When there is a cyber security incident, we provide clear and timely advice to individuals, small to medium business, big business and critical infrastructure operators.
We work with our business, government and academic partners and experts in Australia and overseas to investigate and develop solutions to cyber security threats.
We have a national footprint of Joint Cyber Security Centres where we collaborate with nearly 200 industry, government and academic partners on current cyber security issues. We also work with law enforcement authorities to fight cybercrime.
We are part of the Australian Signals Directorate (ASD), which has a long history of cyber security excellence. For more information about the ACSC, visit our corporate page.
Cyber security is everyone’s responsibility. Let’s work together to make Australia the safest place to connect online.
Minister for Defence
Senator the Hon Linda Reynolds CSC
The Minister for Defence is responsible for the Australian Signals Directorate (ASD).
The Director-General leads ASD and is responsible to the Minister for Defence.
In December 2017, the Prime Minister announced Mr Mike Burgess as the Director-General Designate of ASD. Mr Burgess commenced his appointment on 4 January 2018. Mr Burgess became the first Director-General of ASD on 1 July 2018.
Prior to his appointment to ASD, Mr Burgess was an independent consultant specialising in strategic cyber security advice. In 2017, Mr Burgess was also a member of the Federal Government’s naval shipbuilding advisory board, a member of the board of the Australian Cyber Security Growth Network and a non-executive director of SC8 Limited.
Mr Burgess was a member of the Prime Minister’s expert panel for Australia’s 2016 Cyber Security Strategy. Previously Mr Burgess was the Deputy Director for Cyber and Information Security at the Defence Signals Directorate (DSD) from 2008 to 2013.
Mr Burgess has a degree in electronics engineering from the South Australian Institute of Technology. He worked in private industry before joining the Defence Science and Technology Organisation in 1991 working in the field of imaging radar. Mr Burgess joined DSD as a collection engineer in 1995. During his career at DSD Mr Burgess held a variety of roles spanning the intelligence, security, capability development and executive aspects of DSD’s business. He left DSD in early 2013 to become Telstra’s Chief Information Security Officer. He held this role until November 2016.
Principal Deputy Director-General and Head ACSC
Lieutenant General John Frewen DSC AM
John Frewen is a career infantry officer whose father and grandfather also served in the Australian Army. He completed his secondary education at Xavier College in Melbourne and graduated from the Royal Military College, Duntroon, in 1986. His first appointment was as an Infantry Platoon Commander in the First Battalion of the Royal Australian Regiment (1 RAR). He subsequently went on to command the Second Battalion of the Royal Australian Regiment (2 RAR) and later the Army’s 1st Brigade in Darwin.
Lieutenant General Frewen has held a range of senior staff appointments, most notably Military Assistant to the Chief of Army, Chief of Staff Headquarters Forces Command, and Head Military Strategic Commitments in Australian Defence Headquarters.
His operational service includes Rwanda with the United Nations in 1994–95; leadership of the initial regional military intervention force in support of the re-establishment of law and order in the Solomon Islands in 2003 (comprising military personnel from Australia, New Zealand, Fiji, Papua New Guinea and Tonga); time in Afghanistan as both the Australian National Commander in Kabul and, later, in Kandahar coordinating NATO efforts to rebuild the Afghan National Army and Afghan National Police across Regional Command South. Most recently he was the national commander of all Australian Defence personnel in the Middle East, including Iraq and Afghanistan, throughout 2017.
Lieutenant General Frewen is a graduate of the University of New South Wales, the Australian Army Command and Staff College, and the US Army War College. He holds a Bachelor of Arts degree and Masters degrees in both Defence and Strategic Studies. He was appointed as a Member of the Order of Australia (AM) for his leadership in the Solomon Islands. He was awarded the Distinguished Service Cross for his command of forces in the Middle East in 2017.
Lieutenant General Frewen was appointed as the Principal Deputy Director of the Australian Signals Directorate on 1 March 2018 and, additionally, as Head ACSC on 29 March 2019. He will remain Head ACSC until a permanent replacement is found.
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