Kati Aubin is an associate lawyer at Nelligan O’Brien Payne LLP, and a member of our Litigation and Indigenous Law practice groups.

Kati represents clients in all aspects of litigation and advocacy, including insurance defence, commercial liability, and employment. She has appeared before the Ontario Divisional Court, Superior Court of Justice, and Small Claims Court on a wide array of matters. Kati also represents clients outside of court, in mediation and before tribunals.

While studying law at Queen’s University, Kati won the Samworth Advocacy Prize and the David Sabbath Prize in Trial Advocacy. Prior to joining the firm, she practised as a litigator in Toronto and Ottawa. Kati has been involved with the Philip C. Jessup International Law Moot Court Competition for many years, first winning prizes for her written and oral advocacy as a competitor, and now mentoring and judging law students from across Canada.

Kati is passionate about advocacy. She enjoys meeting the challenge of a legal problem, and building an argument from the ground up in order to best advocate for her clients. For Kati, the practice of law is about balancing competing interests and finding creative solutions that are practical and workable. It’s important to her that her clients feel like they’ve been heard.

Kati is unafraid to speak out on behalf of her clients. She can be, by her own admission, stubborn at times – for her clients, this means that she is prepared to fight to protect their interests. To balance this out, she also has a healthy sense of humour and is very approachable.

Outside of the office, Kati likes experimenting (not always successfully) in the kitchen. She also enjoys attending live music and theatre performances. She is no stranger to the stage herself, and has performed twice in the GCTC’s Lawyer Play.



  • >Call to the Ontario Bar (2014)
  • >Juris Doctor, Queen’s University (2013)
  • >Certificate in Public International Law, Queen’s International Study Centre (2011)
  • >Bachelor of Arts in Political Science (Hons.), University of Western Ontario (2009)

Professional Activities and Organizations

  • >County of Carleton Law Association
  • >Advocate’s Society