Marie Costa
Biography
With a focus on regulatory matters, Marie has approximately 20 years' experience advising private and public sector clients in relation to regulatory investigations and proceedings, particularly in Australian workplace health and safety and criminal law.
Marie is valued by clients for her technical knowledge, sound judgment and pragmatic advice.
Practice Focus
Marie supports clients with a range of matters, including critical incident response, investigations, prosecutions, coronial inquests, legislative compliance, risk management, contractor management and training. Marie also assists clients with criminal law enquiries where there is an intersection with employment and workplace conduct.
Marie has acted for clients in a range of industries. These include construction, manufacturing, transport, rail, energy, technology, retail, professional services, aviation, ports and maritime, education, entertainment, health, disability services, emergency services and correctional services.
A broader area of Marie's practice involves advising clients in relation to public and private inquiries, including royal commissions, boards of inquiry and anti-corruption commission investigations.
Marie is an Accredited Mental Health First Aider.
Professional Honors
- Legal 500, Asia Pacific – Leading Associate (2025)
- Legal 500, Asia Pacific – Rising Star (2020-2024)
- Legal 500, Asia Pacific – Next Generation Lawyer (2017-2019)
Professional Associations and Memberships
- Law Institute of Victoria
- Mental Health First Aid Australia
Admissions
- High Court of Australia (2007)
- Supreme Court of Victoria (2006)
Languages
- English