Peter O’Brien

O’Brien Criminal & Civil Solicitors is a leading law firm based in Sydney, Australia, renowned for its commitment to justice and comprehensive legal services. Established by Principal Solicitor Peter O’Brien, the firm has built a formidable reputation over two decades, representing clients in criminal defence, civil litigation and defamation matters across New South Wales and nationwide. It is distinguished by its specialist expertise, ethical practice and proactive advocacy for marginalised communities. The civil law division at O’Brien Solicitors is dedicated to securing justice for individuals who have suffered harm due to unlawful actions by authorities or institutions. The firm handles a diverse array of civil cases, including:

Claims Against Police & Authorities: Representing clients in cases of unlawful arrest, false imprisonment, police misconduct and abuse of power.

Institutional Abuse Cases: Pursuing claims for victims of historical sexual abuse and other mistreatment by such institutions as schools, churches and government entities.

Medical Negligence: Assisting clients in seeking compensation for harm caused by substandard healthcare services.

Defamation: Protecting clients' reputations through legal action against false and damaging statements in media and social platforms.

The firm’s civil law team employs a trauma-informed approach, recognising the emotional and psychological impact of such legal proceedings on clients. This sensitivity ensures that clients receive compassionate and effective representation throughout the process.

Peter O’Brien, founder and Principal Solicitor, is a distinguished figure in Australian law. With more than 20 years’ experience, Mr O’Brien has demonstrated his dedication to civil justice, particularly in cases involving institutional abuse and unlawful conduct by authorities. His notable contributions include:

Co-Founding the UTS Community Law & Legal Research Centre: Established in 1996, the centre focuses on community legal education and research.

Representation in Major Royal Commissions: Mr O’Brien has acted for clients in all major Royal Commissions over the past decade, including the Royal Commission into Institutional Responses to Child Sexual Abuse.

Legal Precedents: He served as the instructing solicitor in a false imprisonment case that resulted in the establishment of new legal principles in Australia.

Academic Contributions: He co-authored Intentional Torts Litigation in Australia, a leading text in the field.

Mr O’Brien’s commitment to civil law has been recognised through various awards, including the Law Society’s President’s Medal in 2023 and the President’s Award by the Law Council of Australia in 2024, underscoring his impact on the legal profession and social justice. Meanwhile, the firm provides pro bono assistance and supports clients eligible for legal aid – ensuring access to justice for disadvantaged individuals and communities.