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Bret Walker

Bret William Walker AO FAAL SC is an Australian barrister practicing at the New South Wales Bar. Admitted to the Bar in 1979 and appointed Senior Counsel in 1993, Walker is renowned for his appellate advocacy across diverse legal fields, including constitutional, criminal, and commercial law. He has appeared in numerous high-profile cases before the High Court of Australia, representing clients such as Cardinal George Pell in his successful 2020 appeal against convictions for historical child sex offenses. In 2021, Walker recorded the highest number of appearances in the High Court, arguing 35 matters—more than twice that of the next most active advocate—and prevailed in eight of 15 special leave applications. A generalist practitioner who advises governments and major corporations, he has earned accolades including the 2009 Law Council of Australia President's Medal for his contributions to the profession and appointment as an Officer of the Order of Australia in 2021. Walker has also served as past President of the New South Wales Bar Association and as a founding fellow of the Australian Academy of Law.

Early Life and Education

Family Background

Bret Walker was born in 1954 to an Anglican minister father and a homemaker mother. His father presided over a congregation in Concord West, a Sydney suburb, placing the family within the tradition of clerical households akin to those of former Prime Minister Bob Hawke and Senator John Button. This background reflects a modest, faith-oriented upbringing in mid-20th-century Australia, though specific details on parental names or extended family remain undocumented in public records.

Academic and Professional Training

Walker obtained a Bachelor of Arts and a Bachelor of Laws from the University of Sydney. He completed practical legal training required for admission to the legal profession in New South Wales and was admitted to the bar on an unspecified date in 1979. Upon admission, Walker commenced independent practice as a barrister at the New South Wales Bar, focusing initially on general advocacy before developing specialization in appellate and constitutional matters. In 1993, he was appointed Senior Counsel, a designation reflecting advanced professional standing and typically awarded after years of demonstrated excellence in complex litigation.

Admission and Early Practice

Bret Walker was admitted to the bar of in November 1979 and enrolled as a practitioner of the the same year. He commenced practice as a from chambers in on 9 November 1979. In his initial years at the bar, Walker engaged in common law and equity matters, gradually incorporating appellate work, including High Court appearances related to negligence litigation. He did not initially maintain a substantial personal injury practice but built a reputation as a sharp and formidable advocate over the ensuing decade and a half before taking silk. This period laid the groundwork for his later preeminence in constitutional and public law advocacy.

Development as Senior Counsel

Bret Walker was appointed Senior Counsel in New South Wales on 1 December 1993. He took silk in the same month and was subsequently appointed Queen's Counsel in Western Australia in 1994. Following his elevation, Walker assumed key leadership roles in the legal profession, serving as President of the Law Council of Australia from 1997 to 1998. He also acted as past President of the New South Wales Bar Association and chaired the Law Council's National Criminal Law Liaison Committee from 1998 to 2001. These positions underscored his growing influence in shaping professional standards and policy. Walker's practice as Senior Counsel centered on appellate and constitutional law, with a focus on High Court of Australia appearances across diverse areas including public and administrative law. He emerged as one of Australia's foremost advocates, noted for intellectual rigor in complex matters. In 2021, Walker led all barristers in High Court hearings, appearing 35 times—more than double the next most frequent advocate. This volume reflected his established status in appellate work, where peers rank him among the top barristers nationally for sustained excellence.

High Court of Australia Cases

Bret Walker has appeared extensively before the , often representing appellants and respondents in constitutional, criminal, and civil matters. In 2021 alone, he participated in 35 hearings across 32 cases, more than twice the appearances of the next most active counsel, underscoring his prominence in the court's docket. One of his most high-profile involvements was in Pell v The Queen HCA 12, where Walker served as senior counsel for Cardinal George Pell, appealing convictions for historical child sexual offenses. He argued that the jury must have entertained reasonable doubt, as the prosecution failed to negate the improbability of the alleged events given logistical impossibilities in the cathedral setting post-Mass. The High Court unanimously allowed the appeal on April 7, 2020, quashing the convictions and entering acquittals, deeming the verdicts unsafe due to inconsistencies with unchallenged evidence. In Egan v Willis (1998) 195 CLR 1, Walker appeared as counsel for the respondents in a dispute over and proceedings against legislators. The case examined the scope of Article 9 of the Bill of Rights 1688 in contexts, with the court upholding absolute privilege for parliamentary proceedings while clarifying limits on its extension to non-parliamentary acts. Walker has also argued in matters involving institutional liability, such as a 2023-2024 High Court hearing on vicarious liability for clergy misconduct, where, representing a diocese, he emphasized common law stability and distinctions between employees and independent contractors to resist expansive interpretations that could unsettle prior precedents. More recently, in 2025, he represented the Russian Federation in a constitutional challenge to federal approvals for a new embassy site in Canberra, contesting inconsistencies with planning laws and foreign relations powers under section 51(xxix) of the Constitution; the matter remained pending as of mid-year.

Other High-Profile Matters

Walker represented former Attorney-General Christian Porter in a defamation action against the Australian Broadcasting Corporation (ABC) and journalist Louise Milligan in the Federal Court of Australia. The suit arose from a February 2021 ABC report alleging Porter had raped a woman in Sydney in 1988 when both were teenagers; Porter, who denied the allegation, claimed the article conveyed that he was guilty of historical sexual assault. The case settled in September 2021, with the ABC issuing an apology, paying Porter's costs, and making an ex gratia payment to a charity nominated by Porter, without any admission of liability by the ABC. In the defamation proceedings brought by Victoria Cross recipient Ben Roberts-Smith against Nine Entertainment and The Canberra Times, Walker led the appeal before the Full Federal Court following a 2023 trial judgment that rejected Roberts-Smith's claims and found, on the balance of probabilities, that he had committed war crimes including unlawful killings in Afghanistan. Roberts-Smith argued the trial judge failed to afford him the presumption of innocence and relied on inconsistent witness evidence; the appeal was dismissed in May 2024, upholding the findings against him. Walker contended during hearings that phrases like "blooding the rookie" did not necessarily imply illegitimate killings and highlighted contradictions in Afghan witness testimony. Walker acted for former New South Wales Premier Gladys Berejiklian in her appeal to the New South Wales Court of Appeal against findings by the Independent Commission Against Corruption (ICAC) that she engaged in serious corrupt conduct by failing to disclose a conflict of interest in providing grants to a project linked to her secret partner, Daryl Maguire. In July 2024, the court allowed the appeal in part, ruling that ICAC's determination of "serious corrupt conduct" was affected by apprehended bias due to the commissioner's prior public comments and jurisdictional overreach in characterizing the conduct without proven dishonesty. Walker also represented lawyer Bernard Collaery in proceedings under the National Security Information Act in the ACT Supreme Court, where closed hearings were mandated to protect classified material related to Collaery's charges of breaching secrecy provisions over disclosures about a Timor-Leste spying operation. During a 2021 hearing, Walker conceded the Act compelled the court to conduct parts of the trial in secret but argued for safeguards against undue prejudice. The charges against Collaery were dropped by the Commonwealth in June 2022.

Public Commentary and Intellectual Contributions

Views on Constitutional and Political Issues

Walker has expressed support for the proposed Indigenous Voice to Parliament, emphasizing that legal critiques overemphasizing justiciability risks distract from substantive democratic debate. In a March 2023 address to the Australian Bar Association, he argued that fears of the Voice wielding undue moral or political influence—without capacity to invalidate laws—mirror uncontroversial advisory bodies like the Productivity Commission, and deeming it uniquely problematic on those grounds constitutes racism, as no equivalent objection arises for non-Indigenous institutions. He criticized fellow lawyers for amplifying "doomsday" scenarios of litigation flooding courts, asserting such justiciability concerns are overstated and that professionals should prioritize voter education on merits over procedural alarms. By August 2023, Walker reiterated that lawyers had sufficiently aired constitutional qualms, urging focus on the proposal's alignment with existing race-based constitutional provisions, while decrying its framing as a "Canberra Voice" disconnected from Indigenous communities. In constitutional interpretation, Walker advocates a robust implied freedom of political communication derived from the Australian Constitution's structure, particularly Sections 7 and 24 mandating representative government. He has litigated challenges asserting that laws restricting speech, such as Section 18C of the Racial Discrimination Act 1975 prohibiting acts reasonably likely to offend based on race, impermissibly burden this freedom when applied to political discourse. Representing Senator Pauline Hanson in a 2023 High Court bid to repeal or narrow 18C, Walker contended the provision chills core political expression essential to democratic accountability, extending prior arguments in cases like McCloy v New South Wales (2015) where he contested donation caps as infringing communication flows. Yet, he distinguishes national security measures from free speech encroachments; in an August 2014 address at the Free Speech conference, Walker maintained that counter-terrorism laws primarily address conduct, not expression, and do not equate to broader censorship absent direct political targeting. Walker emphasizes transparency as foundational to democracy, arguing in his June 2018 Whitlam Oration that elected officials and executives bear a duty to disclose information enabling informed public scrutiny, beyond mere open justice in courts. He critiqued secrecy in governance—statutory or common law—as vulnerable to partisan abuse, urging government lawyers to dissuade clients from leveraging legal opacity for political advantage, as secrecy undermines causal accountability in decision-making. In his 2017 Harry Evans Lecture, he examined parliamentary immunities under Article 9 of the Bill of Rights 1689, questioning whether absolute protections for proceedings justify shielding politically motivated statements, advocating calibrated limits to preserve legislative integrity without eroding deliberative freedoms. These positions reflect a first-principles commitment to constitutional mechanisms fostering genuine representation, wary of institutional biases toward opacity or selective enforcement that distort public discourse. Bret Walker has addressed in several lectures and publications, focusing on the tensions between professional duties, commercialization, and independent judgment. In his 2005 speech "Lawyers and Money," delivered at the Ethics Centre, he critiqued the legal profession's increasing alignment with entrepreneurial business models, arguing that profit-driven practices risk undermining ethical commitments to client service and . He highlighted conflicts arising from litigation funding and "spec briefs," where financial considerations could compromise barristers' undivided loyalty to clients, stating that "lawyers and money are thus treated as amounting to legal practice as entrepreneurial business." Walker advocated preserving smaller firms' focus on integrity over revenue maximization, warning that excessive commercialization erodes the profession's prestige and ethical core. In a 2025 event at the Supreme Court of New South Wales, Walker revisited these themes in "Lawyers and Money: 20 Years Later," discussing persistent ethical challenges from the profession's business-for-profit orientation, including threats to traditional values like impartial advocacy. He reiterated concerns over how financial pressures, such as those from large firms prioritizing billable hours, can prioritize revenue over justice, potentially leading to diluted client care. Walker has also opined on barristers' core ethical duties, emphasizing zealous representation tempered by candor to the court. In his 1998 article "Test of Loyalty - Procedural Reform and Advocates' Ethics," he described as encompassing norms beyond personal honesty, including the duty to advance client interests diligently while exercising forensic judgment uninfluenced by personal views. Barristers, he noted, must disclose binding adverse authorities and may strategically narrow issues for efficiency, but loyalty remains paramount unless overridden by court obligations, such as avoiding misleading conduct. This framework supports advocates' immunity from negligence suits in court work, as it incentivizes fearless . In "Ethics in Law" (1999), Walker examined the inseparability of legal rules and ethical practice, praising moves toward uniform national conduct standards via the Law Council of Australia while cautioning against business structures that dilute personal accountability. He underscored client communication and informed instructions as ethical imperatives, akin to tortious duties of care. Walker has defended the cab-rank rule as vital for access to justice, obliging competent barristers to accept briefs regardless of client unpopularity, thereby preventing selective representation based on moral judgments and ensuring representation for controversial causes. These views align with his role as a foundation member of the Bar's Ethics Advisory Panel since 2003.

Recognition and Legacy

Honors and Awards

Walker was appointed Senior Counsel in New South Wales in 1993 and Queen's Counsel in 1994. He became a Foundation Fellow of the Australian Academy of Law upon its establishment in 2007. In September 2009, at the 36th Australian Legal Convention in Perth, Walker received the Law Council of Australia's President's Medal, the organization's highest honor, nominated by the New South Wales Bar Association for his nearly three decades as a barrister, advisory role to government on constitutional matters, pro bono assistance to social justice causes, and commitment to the rule of law. On 26 January 2021, in the Australia Day Honours, Walker was appointed an Officer of the Order of Australia (AO) in the General Division for distinguished service to the law, particularly constitutional and appellate litigation, to professional associations, and to the community.

Reputation and Influence

Bret Walker SC is widely regarded as one of Australia's preeminent barristers, particularly in constitutional and appellate matters before the High Court. Legal observers and media have described him as a "formidable" advocate who has built a reputation for incisive cross-examination and strategic argumentation in high-stakes cases. His frequent appearances in the High Court underscore this standing; in 2021, he was the most active counsel, participating in 35 hearings, more than double the next busiest advocate. Publications such as the Australian Financial Review have labeled him "Australia's leading silk," reflecting his influence in shaping legal discourse on issues like the Indigenous Voice referendum. Walker's influence extends beyond courtroom advocacy through leadership roles and public commentary. As former president of the Bar Association and a founding fellow of the Australian Academy of Law, he has contributed to the profession's governance and ethical standards. His representations in landmark cases, including the successful appeal for Cardinal in 2020 and advice on flood plain harvesting regulations in in 2021, have set precedents and informed policy debates. In 2025, his briefing to represent the Russian Federation in a challenge against the Australian government further highlights his selection for internationally sensitive matters. Walker's reputation for intellectual rigor is evidenced by his Officer of the Order of Australia (AO) award and recognition in professional rankings as a top criminal and constitutional lawyer. His public statements, such as cautions on the presumption of innocence in media trials, have influenced broader discussions on legal ethics and fair trial principles. Despite occasional controversy over client choices, his peers and judiciary acknowledge his exceptional skill, with judges noting the challenges posed by his arguments in complex litigation.

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