Mark O'Callaghan

Principal M.G. O'Callaghan & Associates

Gosford, NSW

About Mark

Mark O'Callaghan is the Principal of M G O'Callaghan & Associates, a well-regarded legal practice serving the Central Coast for almost two decades. With an extensive background in the local judicial system, he spent 11 years in Local Courts, holding positions such as Registrar of the Bidura Children's Court and Deputy Registrar of the Gosford District and Local Court. Admitted to the roll of practising lawyers in June 1998, Mark initially honed his legal skills as an employed solicitor at Orchiston Ranzetta Finney for five years. In August 2003, Mark embarked on his journey as a sole practitioner, establishing M G O'Callaghan & Associates. Over the past 24 years, he has acquired a broad spectrum of experience in criminal law, probate and wills, as well as family law. His deep understanding of legal processes, coupled with his practical courtroom experience, enables him to provide comprehensive legal services tailored to the needs of his clients.

Practice areas

Criminal & Traffic

Estate Planning

Family Law

Contact information

Gosford, NSW

Suite 49, 24-26 Watt Street, Gosford, NSWWebsite

Practice certificate

Name: Mark O'Callaghan
Date of admission: 1998
Certification type: Principal of a law practice
Class: Law Practice
Region: NSW

Last checked: 17 Apr 2026 • Checked with Law Society of NSW

Practice areas

Criminal & Traffic

Criminal Law

Estate Planning

Family Law