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Steven Mattiussi


Call Steven +61 2 8915 1085
Call Steven +61 419 445 362

“My clients are often experiencing the most challenging of times in their business and affairs. I work to protect, guide, and strategically advance their interests.”

Steven specialises in and leads the Commercial Litigation & Dispute Resolution, and Insolvency & Restructuring practices at Addisons.

An experienced litigator in upper Australian jurisdictions and abroad, Steven acts across a wide range of complex corporate and commercial disputes including contract disputes, shareholder disputes and issues of succession, as well as claims involving high-value deceased estates.

Steven also draws on his core skills to provide corporate and commercial advice to assist with the financial settlements between separating parties in large matrimonial estates involving complex corporate, trust and joint venture structures.

At the core of Steven’s practice is advice to clients during periods of actual or potential financial stress, including formal insolvency processes (administrations, liquidations, and bankruptcies), and often this work requires various regulatory considerations and investigations. Clients trust Steven to understand their commercial objectives, offer practical advice, and guide them sensitively and reliably through periods of distress whilst navigating highly technical legal considerations.

Steven’s clients span a variety of industries including property & construction, retail, hospitality, manufacturing, IT, professional services and financial services.

Administration & Liquidation of Property Developer — acted for the external administrators of failed property developers regarding projects in rural NSW and regional Victoria, pursued claims against former directors, advisors and related parties to recoup company losses for creditors and investors.

ASIC — acted for section 19 examinees in connection with a tech start-up.

Austral Enterprises Pty Ltd (Receiver & Manager Appointed) (In Liquidation) — acted for the court-appointed receiver and then liquidator of a foundry business following a shareholder dispute.

Calverly Properties (Kingswood Birches) Limited (In Administration) — acted for the administrators of a UK-based property fund in respect of fraudulent conduct perpetrated by the directors and their professional advisors resulting in multi-million-pound losses for investors and the major secured creditor, Clydesdale Bank.

Deceased Estate — acted on a Family Provision Act claim in respect of a deceased estate with an estimated value of more than $40 million.

Financial Settlement — acted for one of the parties to a matrimonial separation in the unwinding of a significant rural enterprise involving various trust, corporate and joint venture structures, and separate litigation in both the Supreme Court of NSW and the Federal Circuit and Family Court of Australia.

Guvera Australia Pty Limited and Guv Services Pty Limited (both, In Liquidation) — acted for the liquidators of the failed music streaming start-up that resulted in investor losses of ~$180 million, undertook public examinations and pursued recovery actions.

ICRA Rolleston Pty Ltd (In Administration) — acted for the administrators of the company, whose interests included a coal mining enterprise at Rolleston, QLD.

Lehman Brothers — assisted with the external administration of the Asian-based Lehman entities regarding the affairs of their subsidiaries, the Australian-based Lehman entities.

Ovato Limited (ASX: OVT) — acted for the group’s secured creditor in connection with the voluntary administration and ultimate sale to IVE Group (ASX: IGL).

Regency Funding — acted for the litigation funder of multiple airbag class actions against various international motor vehicle manufacturers, including applications regarding the Court’s powers to make common fund orders and, ultimately, settlement approval of a $52 million resolution of six of those class actions.

Shareholder Dispute — acted for the minority shareholder in oppression proceedings regarding the operations of a renowned Sydney restaurant business.

Sirtex Medical Limited (ASX: SRX) — acted for Sirtex on the Scheme of Arrangement.

Committees and memberships

Admitted to practice in the Supreme Court of New South Wales and the High Court of Australia,

Member, Law Society of New South Wales

Fellow, Australian Restructuring, Insolvency & Turnaround Association (ARITA)

Member, International Association of Restructuring, Insolvency & Bankruptcy Professionals (INSOL International)


Building and Construction

Financial Services


Professional Services


Property and Commercial Development





Bachelor of Arts, University of Sydney

Bachelor of Law, University of Sydney