Margie O’Neill – Director

Margie O'Neill

Margie O’Neill, a specialist accredited in Family Law, has extensive experience in all aspects of Family Law. This includes parenting, property settlements, Hague Convention matters, relocation and recovery applications and same-sex de facto matters.

Margie has been acknowledge as a recommended Leading Parenting Lawyer for the year 2024 by Doyles Guide.

Clients who have worked with Margie O’Neill describe her as an empathetic and sensitive professional who understands their unique needs. She has earned recognition for her straightforward and pragmatic approach. Margie keenly understands the emotional strain that often accompanies separation and divorce. Further, she possesses a profound insight into the potential harm caused by family conflicts, impacting both parents and children.

Margie places a strong emphasis on the best interests of children, and as a parent of three sons, she recognises the importance of parents working together for the benefit of their children. She believes in the value of maintaining respectful communication, even during challenging times.

Margie’s dedication to her field is evident through her recognition in Doyle’s Guide 2023. In addition she has been acknowledged as a leading Parenting and Children’s Lawyer in New South Wales, as well as a recommended Family Lawyer in Sydney.

For appointment scheduling please feel free to visit the De Saxe O’Neill contact page on our website, or you can contact our team at 02 9948 3820. We are here to assist you.

Margie has a Master of Laws in dispute resolution and is a trained Collaborative Lawyer and Mediator. Whilst her preferred method of resolving disputes is outside of the courtroom, if necessary Margie is comfortable and confident to ably represent clients in court.

Prior to becoming a lawyer, Margie practised as a Social Worker across a broad range of settings including medical, children’s services, disability and aged care. This knowledge and experience complement her legal skills to assist clients during times of crisis and stress.

Margie has an interest and skill in Elder Law and she is a trained Elder Mediator. Having worked as an ACAT social worker for 10 years Margie is very knowledgeable about the issues encountered as people grow older and the decisions that often must be made. She will work with a person respectfully to achieve the best outcome through mediated agreements and legal documents.

When she is not at work, Margie can be found exercising with family, her friends and her two dogs and she is passionate about skiing and diving. She grew up in Manly and still lives in the area with her family.

Family Law


  • Accredited Specialist Family Law
  • Master of Laws (Dispute Resolution) (University of Technology, Sydney)
  • Juris Doctor (University of Technology, Sydney)
  • Graduate Certificate in Professional Legal Practice (University of Technology, Sydney)
  • Bachelor of Social Work (University of New South Wales)
  • Collaboratively Trained Lawyer
  • Admitted to Practice Supreme Court of NSW
  • Admitted to Practice, High Court of Australia


  • Member, Law Society NSW
  • Board Member,  Collaborative Professionals (NSW) Inc
  • Member, Collaborative Professionals Northern Beaches
  • Member, Collaborative Professionals North Sydney
  • Member, Family Law Section of the Law Council of Australia
  • Co-founder and convener, Northern Suburbs and Beaches Family Lawyers Practice Group
  • Manly Legal Advice Service volunteer


  • The Law Society of NSW
  • Doyles Family Law
  • Doyles Parenting Law
  • Collaborative Professionals (NSW) inc
  • PEXA member
  • Just Fund Accredited
  • AACP

Contact Us

‘Bakery Mews’ Suite 6,
67 Wanganella Street, Balgowlah NSW 2093
Phone: 02 9948 3820