Mark Alfred Dreyfus (born 3 October 1956) is an Australian politician and lawyer. He is a member of the Australian Labor Party (ALP), and has been the MP for Isaacs since the 2007 election. Dreyfus served as the attorney-general of Australia in 2013 and then 2022 to 2025, and as cabinet secretary from 2010 to 2013 and then 2022 to 2025.
Before beginning his political career, Dreyfus worked as a barrister for two decades, specialising in constitutional, commercial and environmental law. After winning the seat of Isaacs in 2007, Dreyfus was appointed to the Cabinet in September 2010 by Julia Gillard as Cabinet Secretary. In February 2013, following the resignation of Nicola Roxon, he was moved to become Attorney-General for the first time. After Kevin Rudd replaced Gillard as Prime Minister in June 2013, Dreyfus was retained as Attorney-General and given the additional roles of Special Minister of State and Minister for the Public Service and Integrity. He would hold these positions for less than three months, as Labor was defeated in the 2013 election.
Throughout Labor's subsequent nine years in opposition, Dreyfus served as shadow attorney-general under both Bill Shorten and Anthony Albanese. Following Labor's victory in the 2022 election, he was appointed to the positions of Attorney-General and Cabinet Secretary for the second time within the first Albanese ministry. During his second tenure as attorney-general, he oversaw the introduction of the National Anti-Corruption Commission, the creation of the Administrative Review Tribunal in place of the abolished Administrative Appeals Tribunal, and the establishment of the Royal Commission into the Robodebt Scheme. He also ordered the discontinuation of the prosecution of whistleblower Bernard Collaery. He was removed as attorney-general following a cabinet reshuffle after the 2025 election.
Dreyfus was educated at Scotch College, Melbourne on a full scholarship and the University of Melbourne, where he resided at Ormond College and graduated with a Bachelor of Arts and a Bachelor of Laws.
Dreyfus also served as a director of the Law Council of Australia and on the Victorian Bar Council and Victorian Bar Ethics Committee.
Since his first professional role as a Field Officer for the Northern Land Council, Dreyfus has worked closely with Aboriginal communities in the Northern Territory, including representing a number of the claimants in the landmark Stolen Generations litigation.
Following Labor's victory at the 2007 Australian federal election, Dreyfus was appointed the Chair of the House of Representatives Legal and Constitutional Affairs Committee. At the 2010 Australian federal election, Dreyfus was re-elected, gaining a further 3.33-point swing to Labor.
In September 2010, Dreyfus was appointed as Cabinet Secretary as well as Parliamentary Secretary for Climate Change and Energy Efficiency in the Second Gillard Ministry. Dreyfus took on additional responsibilities in December 2011 when he was appointed as Parliamentary Secretary for Industry and Innovation.
At the 2013 Australian federal election, Dreyfus was re-elected with a reduced margin of 3.9%, which was extended to 5.9% at the 2016 Australian federal election.
Dreyfus had an easier run at the 2019 Australian federal election after his Liberal Party of Australia opponent was disendorsed for an earlier 'anti-Muslim rant', Dreyfus was re-elected with a 3.45 percent swing in his favour.
Dreyfus was again comfortably re-elected in the 2022 Australian federal election, though his campaign was assisted when his Liberal Party opponent was referred to the Australian Federal Police for investigation after admitting that, though he was enrolled to vote at a pub in the Isaacs electorate, he actually lived in the Melbourne suburb of Camberwell, some 20 km away.
Dreyfus is a member of Labor Right. He is a strong advocate for action on climate change and for the establishment a federal anti-corruption agency. Dreyfus was a vocal supporter of the 'yes' campaign during the Australian Marriage Law Postal Survey and a vocal opponent against Abbott government era funding reductions to climate science research at the CSIRO.
As Attorney-General, Dreyfus appeared before the International Court of Justice in The Hague as Counsel and Advocate for Australia in the case of Whaling in the Antarctic (Australia v Japan; New Zealand intervening) in June and July 2013. ICJ Hears Case of Whaling in Antarctic: Australia vs. Japan United Nations Information Centre Canberra On 1 April 2014, the ICJ handed down its decision in favour of Australia that Japan cease whaling in the Southern Ocean.
Dreyfus as shadow attorney general is the only person to hold the same portfolio in the entirety of Labor's nine years in opposition between 2013 and 2022 as well as being longest serving shadow attorney general.
On 7 July 2022 Dreyfus used his powers as Attorney-General to discontinue the prosecution of lawyer Bernard Collaery, which had been initiated by his predecessor Christian Porter. Collaery had been charged with disclosing confidential intelligence information about the Australia–East Timor spying scandal, with many criticising his prosecution as unjust and unfair.
Dreyfus led the establishment of the Royal Commission into the Robodebt Scheme, announcing the Letters Patent on 25 August 2022 alongside Prime Minister Anthony Albanese.
Dreyfus is a member of the Parliamentary Friends of the IHRA, which has been advocating for universities to adopt a controversial definition of antisemitism.
In 2024, the Albanese government banned the display of Nazi symbols, as well as the symbols of proscribed terrorist organisations.
Dreyfus is a keen swimmer, cyclist and runner and is a frequent participant in open water swims and fun runs within his electorate.
Dreyfus speaks fluent Spanish and has stated that, had he not become a lawyer, he would have liked to become a park ranger in the Alpine National Park.
He is a supporter of the St Kilda Football Club.
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