Best Tax Lawyers, Sydney Australia - Tax audits, taxation objections, tax litigation, tax disputes & prosecutions

Our Team

Principal Director

Tania Waterhouse    LLB (Hons) LLM (Tax)   

Tania is a former director of the Australian Taxation Office (ATO).

She began her legal career with Mallesons Stephen Jacques where she specialised in tax and superannuation.

Tania then joined the ATO where she worked for almost a decade as a Director. During this time she acquired in-depth knowledge of international taxation, superannuation and tax litigation. Tania also developed close professional relationships with numerous senior staff and has maintained this relationship since leaving the ATO.

Tania used all of private and public sector legal experience to establish her own law firm. She now uses her specialist knowledge of taxation law to gain great results for most of her clients.

Clients are always impressed by Tania’s warm, open approach to their tax problems. After talking through their issues with her they always depart feeling greatly relieved to have Tania on their side.

Tania is also a professional florist. She owned her own florist for several years so she knows from personal experience the difficulties small business owners face trying to keep up with their tax obligations while trying to run a successful business. These days she only arranges flowers at home.

Senior Tax Counsel

Will Attoh    LLB(Hons), BAv   

William is a highly skilled tax lawyer with particular experience in debt recovery and litigation.

Upon completion of his law degree, William worked as a researcher for the Justices of the New South Wales Court of Appeal, a role which gave him an invaluable insight into the functions of the court and litigation.

William is adept at managing his time, having studied full time for his law degree whilst working full time. Despite this, he graduated with Honours in the top three of his graduating class and was awarded the Law Prize for Legal Practice, Management and Ethics.

William is a licensed commercial pilot but only flies for fun these days.  He even has a Bachelor of Aviation.


Law Graduate

Sophie Marquis    LLB, BComm   

Sophie graduated with a Bachelor of Laws/ Commerce (major in Financial Planning). She has spent the last five years employed part-time in the financial planning industry and continues to provide financial planning advice.  Sophie  experienced in lodgements of individual, company and trust tax returns through her previous role as a client tax services officer in an accounting firm.

Sophie joined the Waterhouse team to pursue a career in tax law and has a great interest in the residency area of taxation law. She also assists clients in applying for tax debt payment plans and penalty remissions with the Australian Tax Office.

Sophie is passionate about taxation and financial planning for all Australians. Her experience in client engagement means that she cares about our clients and thrives to provide outstanding and efficient services.

In her downtime, Sophie loves to explore the majestic South Coast beaches with her Australian Kelpie.

Law Graduate

Aliyah Aziz    LLB, BComm   

Aliyah is commercially-astute graduate and has a passion for taxation law. Throughout her university studies, she undertook a minor in taxation which accredits her with the qualifications of a registered tax agent.

Since joining Waterhouse Lawyers, Aliyah has been able to use her qualifications to assist clients in matters concerning residency, superannuation and capital gain taxes. She has previously had experience in commercial litigation, from which her exceptional legal research skills can be used to assist clients in various taxation matters.

Aliyah is a true people-person and enjoys engaging with new clients.

In her spare time, she enjoys gardening and researching natural medicine.