[2][3] After university, Devlin clerked for Justice Jack Major of the Supreme Court of Canada and was called to the Ontario bar in 1999.

[1] He then worked at the litigation department of Torys for one year before spending time as a Fox Scholar at Middle Temple in London.

He determined that the police owed a duty of care to individuals reporting crimes, allowing the lawsuit to proceed.

[10] Further that year, Devlin ruled that no jurors will be allowed to serve in an upcoming sexual assault trial unless they confirm they have been vaccinated for Covid-19, which sparked controversy.

[11] In March 2024, Devlin was the judge that overlooked the defamation suit initiated by Quebec based DJ SNAILS, where he awarded the plaintiff $1.5 million in damages.