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O'Sullivan Mediation Pty Ltd
Tom O'Sullivan cover
Tom O'Sullivan

Tom O'Sullivan

Senior Solicitor O'Sullivan Mediation Pty Ltd

Sydney, NSW
Contact us

About Tom

Tom O'Sullivan is a distinguished Senior Solicitor at O'Sullivan Mediation, where he serves as the Principal Mediator. Tom brings extensive expertise in resolving family law, parenting, and property disputes. As a nationally accredited mediator and registered Family Dispute Resolution Practitioner with the Commonwealth Attorney-General's Department, he specialises in mediations that address family provision, contested estate claims, workplace conflicts such as bullying and harassment, and business disputes involving partners and landlords. Tom is committed to helping clients navigate and resolve conflicts efficiently, reducing stress and legal expenses. His practice encompasses face-to-face, online, and telephone mediations both nationally and internationally. His academic credentials include a Bachelor of Laws, Master of Applied Law majoring in Family Law, Bachelor of Commerce, and Master of Commerce. Additionally, he holds a Graduate Diploma in Family Dispute Resolution and a Graduate Diploma in Counselling, further complemented by Advanced Mediation Training with the Australian Institute of Family Law Arbitrators and Mediators. Tom's professional affiliations are extensive. He is an Australian lawyer, a Chartered Tax Advisor with The Tax Institute, a Nationally-Accredited Mediator, and a Registered Family Dispute Resolution Practitioner. He is also an active member of The Law Society of Queensland, The Resolution Institute, and The Tax Institute. His career reflects a dedication to both legal practice and education. At O'Sullivan Legal, Tom focuses on family law, commercial law, tax law, succession law, and estate planning issues, providing clients with effective and affordable legal services. Furthermore, he plays a pivotal role at The Tax Institute as the Course Convenor for the Chartered Tax Adviser program, imparting his technical expertise to future tax professionals. As a lecturer at Macquarie University, Tom inspires postgraduate students in advanced taxation law, enriching their understanding of complex legal issues and policy. Tom's former role as Deputy Head of Content at Wolters Kluwer underscored his ability to lead and communicate intricate regulatory materials, contributing significantly to well-regarded publications such as the Australian Master Tax Guide. Throughout his career, Tom has been recognised for his analytical acumen, collaborative style, and stakeholder management, which have solidified his standing in the legal and education communities.

Practice areas

Commercial Law
Employment Law
Estate Planning
Family Law

Resume

Experience

Special Counsel

Special Counsel

O'Sullivan Legal

Dec 2017 - Present • 8 years 10 months

Lecturer

Lecturer

Macquarie University

Feb 2014 - Present • 12 years 8 months

Deputy Head of Content - Tax, Accounting & Superannuation

Deputy Head of Content - Tax, Accounting & Superannuation

Wolters Kluwer

Sep 2012 - Sep 2017 • 5 years

Course Convenor

Course Convenor

The Tax Institute

Jul 2007 - Present • 19 years 3 months

Jul 1999 - Aug 2012 • 13 years 1 month

Education

NMAS Mediator (National Mediator Accreditation System), Mediation

NMAS Mediator (National Mediator Accreditation System), Mediation

Resolution Institute

2019

Graduate Diploma of Family Dispute Resolution, Mediation

Graduate Diploma of Family Dispute Resolution, Mediation

Australian Institute of Social Relations

2019

Master of Applied Law, Family Law

Master of Applied Law, Family Law

The College of Law Australia

2018 - 2020

Graduate Certificate in University Learning and Teaching, Higher Education/Higher Education Administration

Graduate Certificate in University Learning and Teaching, Higher Education/Higher Education Administration

UNSW

2002 - 2003

Graduate Diploma in Legal Practice

Graduate Diploma in Legal Practice

The College of Law Australia

2000

Master's Degree, Commerce/ Taxation Law

Master's Degree, Commerce/ Taxation Law

UNSW Business School

1999 - 2003

Bachelor's Degree, Law

Bachelor's Degree, Law

UNSW

1994 - 1998

Bachelor's Degree, Commerce (Marketing Major)

Bachelor's Degree, Commerce (Marketing Major)

UNSW

1994 - 1998

Contact information

Sydney, NSW

Suite 15, Level 2, 123 Clarence Street, Sydney, NSWWebsite

Practice certificate

Name
Tom O'Sullivan
Date of admission
2012
Certification type
Principal of a law practice
Class
Law Practice
Region
NSW

Last checked: 20 Jul 2026 • Checked with Law Society of NSW

Practice areas

Commercial Law
  • Tax Law
Employment Law
  • Employment Disputes
Estate Planning
  • Estate Disputes
Family Law
  • Mediation