[6] At Osler, Hoskin & Harcourt, she oversaw the firm's Montreal office litigation group while her own practice area centred around complex civil and commercial cases.
[2] She was nominated to the Supreme Court of Canada by Prime Minister Stephen Harper to replace retiring justice Louis LeBel.
[8] In June 2018, Côté wrote a concurrence when the majority found that the Canadian Human Rights Tribunal's determination that the Indian Act did not violate the Canadian Human Rights Act was reasonable due to judicial deference, in which she argued instead that the Tribunal's decision was correct.
[9] In June 2020, Côté dissented alone when the majority found that an arbitration clause in a standard form contract was void for unconscionability in Uber Technologies Inc v Heller.
In her decision, she agreed carbon pricing is a matter of “national concern,” but disagreed that the federal law was constitutional as written.