Deborah O'Neill

Deborah Mary O'Neill (born 4 June 1961) is an Australian politician who has served as a Senator for New South Wales with the Australian Labor Party since 2013. In her Senate role, she has been described as taking "a fierce approach to accountability." In June 2023, O'Neill was appointed to chair the newly formed Parliamentary Joint Committee on Corporations and Financial Services. In this role, the committee focused on failures of governance and public accountability amongst the large consulting firms Deloitte, EY, KPMG and PwC. In May 2026, O'Neill was invited to chair the newly constituted Parliamentary Joint Committee on Defence.

Early life O'Neill was born in Parramatta, New South Wales. She grew up in Western Sydney, one of six children born to Irish Catholic immigrants Mary and Jim O'Neill. Her mother was born in Thomastown and her father in Cork, though they met in Manchester, England. Drawn by a sense of opportunity and the image "of washing drying in the sun in their own backyard", they migrated to Australia. With her death, O'Neill returned to tertiary studies, fulfilling a promise she made to her sister to become a teacher. O'Neill taught at Mercy Catholic College Chatswood, where she would meet her future husband, then at St Edward's College, East Gosford, and Corpus Christi College.

State politics Her political life began in New South Wales state politics, challenging the Liberal Party's Chris Hartcher for the seat of Gosford in the state election of 2003, reducing his margin to 272 votes. She challenged Hartcher again in the 2007 NSW election, this time in the newly created seat of Terrigal, but was defeated. thumb

National politics Entering federal politics, O'Neill was chosen as Labor candidate for Robertson gaining preselection over incumbent Labor member, Belinda Neal. She went on to win the seat for Labor at the 2010 Australian federal election, defeating the Liberal candidate Darren Jameson, and increasing Labor's margin by 1 point. She served with Labor under Prime Minister Julia Gillard, joining Committees for Health and Ageing; for Education and Employment; and Chairing the Committee on Corporations and Financial Services, at the behest of then assistant treasurer, Bill Shorten Her legacy from this time in office was the construction of a cancer clinic for the local region. As vacant Senate positions are filled by the respective state or territory, the matter was resolved by a joint sitting of NSW Parliament, which took four minutes, with the President of the Legislative Council appointing O'Neill to the Senate, in the term which had begun on 1 July. O'Neill joined the Senate on the opposition benches of the 44th Parliament of Australia serving on the Joint Standing Committee on Foreign Affairs, Defence and Trade. Her anticipated six-year term did not eventuate due to the double dissolution of parliament in 2016. While serving as Senator for NSW, O'Neill has also been made Labor's duty Senator for the divisions of Farrer, Lyne, Hume, Parkes, Calare and Riverina.

Senator and Shadow Minister, 45th Parliament Regardless, O'Neill was elected to the Senate in her own right in the 2016 Australian federal election. In the first sitting of the new Senate she was chosen to be one of the six-year senators in accordance with Section 13 of the Constitution. Serving under Opposition Leader Bill Shorten, she was appointed as Shadow Assistant Minister for Mental Health and Shadow Assistant Minister for Innovation. O'Neill chose to abstain from the Senate Vote on the Same Sex Marriage Bill in 2017. Her strong opposition to Matthias Corman's proposal to reduce corporate tax in 2018 led to her being listed amongst "Women Who Are Absolutely Done Listening To Men."

Senator, 46th Parliament

O'Neill continued to serve from opposition benches, but now under the leadership of Labor leader Anthony Albanese. In July 2019, she was appointed to the Joint Standing Committee on Foreign Affairs, Defence and Trade; and the Joint Statutory Committee on Corporations and Financial Services. Using this position she pressured Australian Securities & Investments Commission to investigate AMP Limited for unfair contracts with financial planners. She also accused AMP Limited, EY and KPMG of allowing sexual harassment and bullying in their organisations, and challenged a member of the Fair Work Commission for displaying sexualised waifus in a government office. In her committee work on Community Affairs, O'Neill confronted the cosmetic surgery industry for "butchering" many patients, then for gaslighting those patients; she also challenged government for its failure to regulate the industry. Likewise, O'Neill pursued the Department of Social Services' Robodebt scheme, for information about suicides amongst people who had been handed unlawful debts, and clashing with the department's secretary Kathryn Campbell. The scheme was scrapped in May 2020 with the government refunding $721m to Australian people. Prime Minister Anthony Albanese appointed her to the committees for Treaties, for Corporations and Financial Services and for Foreign Affairs, Defence and Trade – which she chairs. O'Neill has asserted Labor's commitment to introducing new laws, in 47th Parliament of Australia, allowing faith-based schools to select staff of that faith. She stood against legislation enabling Assisted suicide in Australia's territories. In this role she focused the committee on "uncovering the full extent of failure points" amongst the Big Four accounting firms, particularly their "lack of accountability" to "ensure the national interest prevails.”

Senator and Defence Committee Chair, 48th Parliament Returning to Parliament in 2025, O'Neill has provided oversight in defence, beginning as the Chair of the Defence Subcommittee of the Joint Standing Committee on Foreign Affairs and Trade. On 4 March 2026 the Minister for Defence, Richard Marles, announced legislation had passed to establish the Parliamentary Joint Committee on Defence which would consider matters relating to the Australian Defence Force, Department of Defence, Department of Veteran's Affairs and the Australian Submarine Agency. O'Neill, reported by the Australian Financial Review to be an "AUKUS champion", was reported to be the Chair of the new committee. Known as a devout Catholic Christian, she has described politics as her way of giving action to faith.

Her notable positions have been:

Supportive of a strong public sector, and with that a critic of neoliberal desire for private sector delivery of government services. Supportive of workers rights, advocating for the benefits of entitlements that come with fulltime positions for staff. Conservative on marriage, saying "I believe in the traditional definition of marriage." Concerned at the growing divide between religious and non-religious Australians. She called for a greater focus on religious studies in schools in order to further cultural literacy.

Personal life O'Neill has three children with her husband Paul and lives in Erina on NSW's Central Coast.