Recognised Expertise in Workers Compensation
Jon May is a leading specialist in workers compensation law in the Australian Capital Territory. His expertise has been recognised by Doyle’s Guide, naming him a Leading Work Injury Compensation Lawyer (Plaintiff) – ACT in both 2024 and 2025. With a career spanning nearly two decades, Jon has built a reputation for delivering outstanding results in complex compensation matters.
Advocacy in Historical Sexual Abuse & Medical Negligence
Jon leads Chamberlains’ historical sexual abuse practice, representing survivors in deeply sensitive and complex claims. His work in this area is marked by compassion, discretion, and a commitment to justice.
He is also highly regarded for his work in medical negligence litigation, having run some of the most intricate cases in the ACT. His strategic approach has resulted in significant outcomes for clients affected by medical errors and institutional failures.
Courtroom Experience & Client-Focused Approach
Jon has extensive advocacy experience and regularly appears before the Federal Court of Australia, the ACT Supreme Court, and the ACT Magistrates Court as a solicitor advocate. His courtroom presence is backed by a practical, client-focused approach that prioritises collaboration, clarity, and problem-solving.
Known for his ability to resolve difficult legal issues in highly litigious environments, Jon works closely with each client to tailor strategies that achieve the best possible outcome.
Bio coming soon…
Robert McKessar joined Chamberlains on 27 January 2026 as part of the merger with Braye Cragg Solicitors. He brings decades of specialist experience and a strong reputation for clear, strategic and client‑focused advocacy.
Robert is a Special Counsel and an Accredited Specialist in Personal Injury Law. He holds a Bachelor of Laws and a Bachelor of Economics, and was admitted as a Solicitor in both the Supreme Court of New South Wales and the High Court of Australia in 1983. His extensive background spans workers’ compensation, motor accident and traffic claims, industrial accidents, public liability, product liability, professional indemnity, historical sexual abuse matters, negligence disputes, employment law, and superannuation and insurance claims.
Known for his ability to unravel complex factual and legal issues, Robert approaches each matter like a detailed puzzle, carefully assembling medical, legal, personal and practical information to provide clients with clarity and realistic expectations. Maintaining close oversight of every file, he weighs each decision strategically to secure the best long‑term outcomes. His guiding principle remains: resolve what can be resolved, and fight what must be fought.
Robert is an active member of the New South Wales Law Society and the Newcastle Law Society. He also serves as Honorary Solicitor for the Stockton Surf Life Saving Club, Stockton Bowling Club and Stockton After School Care.
Keziah is a personal injury lawyer practicing almost exclusively in historical institutional child sexual abuse law and is located in our Perth office.
Keziah originally hails from the Kimberley region in WA and is proud of her mixed Indigenous and Asian heritage. Keziah’s mixed heritage along with her broad professional experiences in personal injury law has led her to a career seeking justice and empowerment for survivors of childhood sexual abuse. Previously, Keziah represented an abuse client who received a significant amount of compensation and who’s story was told in the West Australian and other media outlets in 2021. Keziah also successfully achieved compensation for a survivor who was abused whilst a young recruit in the Defence Force.
Keziah understands that the impact of abuse can be incredibly debilitating and far reaching into all areas of an individual’s life including their social and personal relationships, general health, education and working life.
Keziah is passionate about seeking justice and a voice for her clients and is highly relatable and empathic in how she engages with her clients, some of whom are our most vulnerable in society. Keziah explains complex legal processes in a way her clients can understand and prides herself on her ability to build strong relationships and rapport with clients and other stakeholders involved in abuse litigation. Keziah always aims to put her clients at ease whilst navigating the complex legal processes involved in abuse law.
At Chamberlains, Keziah wants to make a positive difference to the lives of her clients so that they may be able to move forward with their lives with lighter hearts and minds.
Keziah is a mother of two and enjoys drinking coffee with friends, swimming and spending time with her family.
Musstafa completed a double degree being a Bachelor of Laws and Bachelor of Business in 2019, he was admitted as a solicitor of the Supreme Court of NSW shortly after. He began his career in Injury & Compensation in 2017 and has become a passionate advocate for injured people across Australia but predominately in NSW. Musstafa regularly appears in tribunals and courts representing his client’s best interest at heart.
Musstafa takes every case as if it were his own, implementing professional expertise by providing legal advice in a simplified manner and maintains personal relationships with clients showing passion and constant contact. He has acted in multiple complex claims, appeals to the Supreme Court of NSW and is not shy of a matter if he believes there are reasonable prospects that it could win.
His expertise is underscored by his status as an Accredited Specialist in Personal Injury Law. His deep understanding of this practice allows him to provide exceptional legal advice and representation to his clients, ensuring they receive the best possible care throughout their journey. Whether dealing with complex legal issues or navigating the intricacies of personal injury claims, Musstafa’s expertise makes him a trusted and reliable advocate for his clients.
In his everyday dealings Musstafa is a problem solver advising client’s as to the benefits, issues, risks that will arise in the claim and implements innovative methods in mitigating the risks that could arise. Success for him is knowing that a satisfied client has been serviced to the best of his ability.
Sarah Hayman is a seasoned legal professional with over 12 years of dedicated experience in abuse work. Her career is marked by a diverse range of roles that have shaped her skills and deepened her commitment to her clients.
Sarah began her journey with the Australian Government Solicitor, working in the Commercial team and conveyancing. She then took a unique path, spending three years helping her brothers run Denman Cellars Beer Café in Airlie Beach, showcasing her adaptability and management skills.
Returning to Canberra, Sarah joined the Director of Public Prosecutions, where she worked on the Family Violence and sexual assault list. As a prosecutor’s assistant, she gained invaluable courtroom experience, attending court sessions and sitting in on various cases, including high-profile murder trials. This role was extremely interesting and further fueled her passion for justice.
Sarah’s expertise in historical abuse cases was solidified through her work with Porters Lawyers, Ken Cush & Associates, and Shine Lawyers. Her dedication to this challenging field is evident in her extensive experience and unwavering commitment to her clients.
In addition to her legal roles, Sarah served as a PA to a Commandant at the Department of Defence, demonstrating her strong administrative skills and ability to support high-level officials.
In March 2023, Sarah moved to Queensland, seeking a new environment and fresh opportunities. She now thrives in her management position with the Personal Injury Team at Chamberlains Law Firm. Sarah’s strong focus on abuse work continues to drive her, and she is passionate about making a difference in the lives of her clients. Her extensive background and dedication make her an invaluable asset to the firm and a steadfast advocate for those she serves.
Rüfus obtained his Bachelor of Laws from Deakin University, and throughout his studies, worked at a community legal centre in Melbourne. After graduating, Rüfus completed his practical legal training with a criminal law Barrister whilst also working as an Independent Children’s Lawyer Paralegal.
Starting at Chamberlains one week after being admitted to practice, he joined the personal injury team to specialise in historical abuse cases. However, since working with Chamberlains, Rüfus has successfully run cases in many areas of personal injury such as medical negligence, workers compensation, workplace negligence, public and occupiers’ liability, and historical abuse.
Rüfus currently has cases in multiple jurisdictions across Australia, including the ACT, NSW, TAS and VIC, and often appears in the Supreme, District and Magistrates Court.
Rüfus diligently analyses the evidence available to best represent and advise his clients. With a passion for the law as a means to seek justice, Rüfus is a strong advocate for those who have suffered harm.
Sarah was admitted as a solicitor in the Supreme Court of New South Wales on 18 June 2021, after being awarded a Bachelor of Laws and Bachelor of Business and Commerce (majoring in Human Resources and Industrial Relations Management) from her university.
Sarah has worked almost exclusively in personal injury law and is passionate about advising clients who have been injured through no fault of their own. For the last 18 months, Sarah has worked solely on historical sexual abuse claims and believes assisting survivors of sexual abuse is the most worthwhile and rewarding work she can undertake with her law degree.
Sarah has represented clients in the District and Supreme Courts of New South Wales, as well as the motor accidents division of the Personal Injury Commission.
Based in our Newcastle office, Tyler Drayton exclusively practices in historical institutional abuse matters, appearing in both the Supreme and District Courts. His work spans across Australia, with active cases in New South Wales, Western Australia, Tasmania, Queensland, and South Australia.
Before entering the legal field, Tyler spent eight years as a landscaper, working on defence bases and at the Newcastle Jockey Club. It was during this time that he developed a strong work ethic and a grounded perspective, qualities that continue to shape his legal practice today. Driven by a desire to make a meaningful difference in people’s lives, he transitioned into law with a clear sense of purpose.
Tyler began his legal studies with a year in Legal Services at TAFE NSW before studying at the University of Newcastle, where he completed a Bachelor of Criminology and a Bachelor of Laws, along with a Diploma of Laws. His academic background is complemented by a diverse range of additional qualifications, including:
These credentials reflect Tyler’s lifelong commitment to learning and his ability to bring a broad skill set to his legal practice.
Tyler’s legal career began with paralegal roles in both plaintiff and defendant work, including debt recovery and motor vehicle accidents. However, it was in plaintiff institutional abuse litigation where he found his calling. Here, he honed his advocacy skills and developed a reputation for loyalty, tenacity, and unwavering dedication to his clients, particularly those who have long been overlooked or unheard.
Known for his passion, integrity, and deep sense of responsibility, Tyler is a fierce advocate for the vulnerable. He brings a client-first approach to every case, ensuring that each matter is handled with the care, respect, and diligence it deserves.