Russell is a Postdoctoral Research Officer at CHeBA UNSW focusing on clinical, genetic, and imaging biomarkers for vascular cognitive impairment. His PhD thesis was on the relationship between social cognition and ageing and dementia processes. Other work includes in vivo biomarkers and predictive factors of Alzheimer's disease, mild cognitive impairment, stroke, and cerebrovascular disease. Past work includes Parkinson's disease and autoimmune encephalitis.