Thirusha received her Bachelor of Arts Social Science Psychology Degree from the University of KwaZulu-Natal, in 2005. She then obtained her Psychology Honours Degree two years later from the University of South Africa. After obtaining her honours degree, she worked for 9 months as an intern Psychometrist for the South African Police Services in their Employee Assistance Wellness Division. She then went on to obtain a Masters Degree in Clinical Psychology from the University of Zululand in 2010, after completing a dissertation which focused on gender equity and psychopathology. Thereafter, she completed an internship at Fort Napier and Townhill Hospitals in Pietermaritzburg and following graduation, worked for a year at Mahatma Gandhi Memorial Hospital, in Durban, as a Clinical Psychologist.

In April 2014, she opened her private practice in Durban North, at the Core Sport and Wellness Medical Centre. And since July 2020 she has been practicing at the Beacon Rock Medical Centre, in Umhlanga Rocks.