Cathy Maser is a paediatric nurse working at The Hospital for Sick Children for the past 30 years. Since obtaining her Master of Nursing degree at the University of Toronto in 2007, she has been working as a Nurse Practitioner in the Division of Adolescent Medicine. Her clinical focus is with youth with chronic illness, substance misuse, sexual health, gender identity and minor mood disorders. Cathy is the team lead (and a founding member) of the Transgender Youth Clinic since its opening in 2013, where she is actively involved in partnerships within the transgender care community and often provides education to schools, parents, health care providers and community agencies on adolescent brain development, mental health, substance use and gender diverse identities. Cathy has academic and professional teaching credentials, plus a great deal of experience and expertise working with marginalized groups.