Sean Brennan


I am a litigator and dispute resolution lawyer with a particular focus on commercial disputes and regulatory/criminal matters. I act on a range of disputes and have advised clients in matters involving judicial review, contract, tort, insurance, professional discipline and criminal liability. I have a particular interest in health and safety and resource management regulatory investigations and prosecutions.

I have regularly appeared in the District Court, High Court and Court of Appeal on a range of matters. I started my career as a Judge’s clerk in the Court of Appeal. Prior to joining Duncan Cotterill, I worked as a Crown Prosecutor, appearing and advising on all aspects of the criminal justice process.