Theodore D Cosco is a Postdoctoral Research Associate at MRC Unit for Lifelong Health and Ageing at UCL. Originally from Whitehorse, Yukon, Theodore developed an interest in gerontology early on. By age 12 he was volunteering at a long-term care facility; a decade later he was engrossed in the BSc with Specialisation in Psychology at the University of Alberta, which included a year as a Research Intern in a dementia care facility. Upon completion of his undergraduate studies, Theodore emigrated to Ireland to complete a MSc in Applied Social Research at Trinity College Dublin. After working as a Research Officer at the Royal College of Surgeons in Ireland he joined the Cambridge Institute of Public Health to pursue his doctoral studies at the University of Cambridge. Theodore’s primary interests are in positive aspects of ageing, e.g. resilience, and applying longitudinal modelling techniques within a life course epidemiological framework.