Maria O'Brien

Ian G. Roberts SC is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Law, Construction / Infrastructure Law and Insurance Law. Ian G., who practices law in Sydney, Australia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ian G. is held by other top lawyers in the same geographic and legal practice area.

I practice exclusively in family law and have done so for the better part of the last 25 years. I have developed a reputation for resolving complex financial and parenting matters in a sensitive but structured way. You can rely on me to provide you with honest and practical advice. Whether you are in the process of separating or needing to protect yourself with a pre-nuptial agreement you can be sure that I will look after your interests. I will keep you informed every step of the way and giv...

Alex Hartmann is a top attorney recognized by Best Lawyers in the practice area(s) of Alternative Dispute Resolution and Construction / Infrastructure Law. Alex, who practices law in Sydney, Australia, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alex is held by other top lawyers in the same geographic and legal practice area.

Quintin was admitted as a lawyer in 2012 and was called to the Bar in 2014. Quintin regularly appears in commercial, estoppel, abuse of process, tax, equity, trust, jurisdictional, constitutional, maritime, property, consumer and tort matters. He is a generalist who is often briefed in cases where multiple areas of law interact. He regularly runs unled trials in the Federal Court and NSW Supreme Court and regularly appears unled in intermediate appellate courts. He is experienced in represent...

Kate Rafton is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Kate, who practices law in Parramatta, Australia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kate is held by other top lawyers in the same geographic and legal practice area.

Julian Peake is a top attorney recognized by Best Lawyers in the practice area(s) of Professional Malpractice Litigation. Julian, who practices law in Sydney, Australia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Julian is held by other top lawyers in the same geographic and legal practice area.

Arthur Moses SC is a top attorney recognized by Best Lawyers in the practice area(s) of Occupational Health and Safety Law and Regulatory Practice. Arthur, who practices law in Sydney, Australia, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Arthur is held by other top lawyers in the same geographic and legal practice area. Arthur Moses SC has been practicing at the NSW Bar in excess of 25 years. He was appoi...

David is regularly briefed in complex commercial and corporate disputes in the Supreme Court and Federal Court. David also appears regularly in the Federal Court in judicial review applications of administrative decisions. As an author of the leading work The Interpretation of Contracts in Australia (now in its second edition) David is often consulted on difficult or financially significant questions of contract law. David also has expertise in private international law, and he is a former le...

Darren Bick is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Darren, who practices law in Sydney, Australia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Darren is held by other top lawyers in the same geographic and legal practice area.

Rohan is a partner in our Sydney office and leads Mills Oakley’s Government and Administrative Law team. Rohan is an experienced solicitor in government and public and administrative law. He has over 20 years’ experience in advising and representing Commonwealth officers, Departments and agencies on sound decision-making procedures, merits and judicial review litigation, statutory interpretation, policy development and implementation and access to information. Rohan is also very e...