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Mark Costello KC

Bachelor of Laws - Queensland University of Technology
Master of Laws - Australian National University


Admitted to the Bar 2011

Appointed Senior Counsel 2022


Mark practises nationally, undertaking trial and appellate work in a range of areas in State and Federal Courts.

His commercial law practice covers all major areas of including arbitration, class actions, contract disputes, competition law, corporate insolvency, regulatory litigation and schemes of arrangement. He has also regularly been briefed in professional liability matters, most commonly involving alleged professional negligence by solicitors. Since taking Silk has also been briefed in a series of complex common law claims.

His public law practice is focused on administrative law, constitutional law and environmental law.

Principal Areas of Practice

  • Commercial Law See all +Close -
    • Administrative Law
    • Appellate
    • Arbitration
    • Aviation and Transportation Law
    • Banking and Financial Services
    • Bankruptcy and Insolvency
    • Class Actions
    • Communications
    • Competition and Consumer
    • Conflict of Laws
    • Contracts
    • Corporations and Securities
    • Cross-border Insolvency
    • Environment and Planning
    • Insurance and Reinsurance
    • Mining resources and energy
    • Partnership disputes
    • Product liability
    • Professional liability
    • Shareholder class actions
  • Common Law See all +Close -
    • Appellate
    • Class Actions
    • Insurance and Reinsurance
    • Professional indemnity
    • Professional liability
  • Equity See all +Close -
    • Appellate
    • Trusts
  • Inquests and Inquiries See all +Close -
    • Commissions of Inquiry
  • Public and Administrative Law See all +Close -
    • Appellate
    • Constitutional Law
    • Judicial review and administrative law
    • Public law


Banks & Financial Services, Funds, Primary Resources, Power & Utilities, Real Estate, Technology, Media & Telecommunications,

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