She is an associate professor at Simon Fraser University and St. Paul's Hospital Chair in Substance Use Research.

[2] Hayashi remained at UBC following her PhD to conduct postdoctoral research in illicit drug use and related harms.

[3] In 2014, she received the Royal Society of Canada's Alice Wilson Award as a woman with "outstanding academic qualifications who is entering a career in scholarship or research at the postdoctoral level.

[5] Upon completing her postdoctoral studies, Hayashi joined the faculty at Simon Fraser University in September 2016.

[6] In this role, Hayashi leads the Vancouver Injection Drug Users Study and Mitsampan Community Research Project.