Dr Casan is a consultant clinical haematologist and haematopathologist, currently working as a clinical trials research fellow at Monash Haematology, and as the lymphoma genomics research fellow under the auspices of the Melbourne Genomics Health Alliance. He sees patients through Monash Haematology outpatient clinics and through the clinical trials unit, based at the Monash Health Translation Precinct.

Dr Casan was awarded an Emerging Researcher Fellowship by Monash Health and appointed to Monash University as an adjunct lecturer in 2018. He is an honorary member of the Shortt Blood Cancer Therapeutics laboratory, where he collaborates on a number of translational research projects related to haematological malignancies.