Our leadership team

Meet the Our Future Health leadership team

Dr Raghib Ali

Chief Executive and Chief Medical Officer
Raghib is a clinical epidemiologist whose research is focused on the causes, prevention and treatment of diseases including diabetes, heart disease and cancer, and on reducing health inequalities. He has spent the last 20 years at the Universities of Oxford and Cambridge and New York University working on similar studies, including UK Biobank and the UAE Healthy Future Study. He is also a Consultant in acute medicine at the Oxford University Hospitals NHS Trust and an Honorary Consultant with the Office for Health Disparities and Improvement. He graduated from Cambridge University and has been awarded postgraduate degrees in Epidemiology and Public Health from the Universities of London, Cambridge and Oxford and is a Fellow of the Royal College of Physicians. He was awarded an OBE in the Queen’s Birthdays Honours 2022 for services to the NHS and the Covid-19 response and was elected as an Honorary Fellow of the Faculty of Public Health in 2023.

Marko Balabanovic

Chief Technology Officer
Marko’s role is to help create a secure and scalable set of platforms for Our Future Health and create a high-quality data resource available for researchers. He has over 25 years’ experience leading technology teams and developing innovations in academia, corporations, and start-ups, in both the UK and US. He is also a Non-Executive Director on the Board of NHS Digital. He studied Computer Science at Cambridge University, and has a PhD in Computer Science (Artificial Intelligence) from Stanford.

Dr Michael B Cook

Executive Director of Science
Michael is a senior epidemiologist with broad and contemporary expertise in research, programme management, and scientific leadership. Michael was previously a tenured, Senior Investigator at the US National Institutes of Health. He has designed and conducted numerous studies to advance etiologic understanding, clinical management, and prevention of chronic disease.

Professor David Hunter MBBS MPH ScD FRACPHM

Chief Science Adviser
David combines his work as our science adviser with his role as Richard Doll Professor of Epidemiology and Medicine and Director of the Translational Epidemiology Unit at the Nuffield Department of Population Health, University of Oxford.

Dr Fiona Reddington

Executive Director of Strategic Partnerships
Fiona helped to establish Our Future Health in 2019 as our Interim Chief Operating Officer before taking responsibility for building our partnerships across the NHS, charities, and industry. She previously spent over ten years at Cancer Research UK where she was responsible for research portfolios in clinical trials, population research, prevention and early diagnosis. She holds a PhD (Neurophysiology) from Kings College London (UMDS).

Michael Warren

Chief Communications Officer
Michael joined Our Future Health in May 2020 and looks after our communications, policy and public affairs. He previously spent a year at the UK BioIndustry Association, following a 17-year career as a Senior Civil Servant responsible for communications teams at Innovate UK, the Department of Work and Pensions, the Home Office and the Prime Minister’s Office at No10 Downing Street. He studied psychology at the University of Durham.

Fiona Maleady-Crowe

Executive Director of Ethics, Compliance and Governance
Fiona joined Our Future Health in October 2021 and is responsible for the Ethics, Compliance and Governance function. She previously led the ethics function at Genomics England working across the 100,000 Genomes Project and the NHS Genomics Medicine Service. During the COVID pandemic, Fiona worked as an ethical advisor to Test and Trace and NHSX. She holds postgraduate degrees in neuroscience from Trinity College Dublin.

James Wyatt

Chief Financial and Operations Officer
James is a chartered accountant and accredited project manager. He has over 20 years of multi-sector experience in major blue-chip organisations, including Credit Suisse First Boston, Centrica, Virgin Media and Colt, and has also worked in the not-for-profit sector at the Francis Crick Institute. Alongside financial management, James is focused on organisational effectiveness, creating a positive culture, clear governance and consistent delivery of high-quality operations. These strands are intwined in his role at Our Future Health. To achieve success, he is passionate about combining insightful reporting and open discussions in a way that drives operational performance and decision-making. This has led to him publishing a book on The Art of Discussion. James studied Mathematics at Worcester College, Oxford University.

Dr Tim Sprosen

Executive Director, Participant Recruitment Operations
Tim joined Our Future Health in September 2022 and leads on participant recruitment operations. He has over 25 years’ experience of delivering large-scale prospective studies and was previously Chief Scientist at UK Biobank. He has worked at a number of leading universities including Imperial College London and Oxford. He chairs the Yorkshire and the Humber – Sheffield Research Ethics Committee. Tim has a PhD in neuropharmacology from the University of Cambridge.

Kate Evans

Executive Director of Researcher Data and Product
Kate’s role is to ensure that Our Future Health data enables researchers to do groundbreaking work. She also looks after the product function. Kate spent nearly 20 years in UK government national security, using data and technology to keep the country safe. Kate is also a trustee for the charity Mental Health Matters and an adviser on the Data for London Board. She studied languages and philosophy, and holds a postgraduate degree in Social Business and Entrepreneurship from the London School of Economics.

Dr Cosima Gretton

‪Executive Director of Digital Health and Deputy Chief Medical Officer
Cosima leads on two core parts of Our Future Health’s programme: returning health insights to our volunteers, and enabling our research community to conduct recontact studies. She started her career as an NHS doctor and went on to work at health technology start-ups. During the pandemic, Cosima was Deputy Director for new COVID-19 testing technologies at NHS Test & Trace, where she led the establishment of mobile and automated diagnostic laboratories across the UK. Cosima studied Experimental Psychology at Oxford University and Clinical Medicine at King’s College London.

Martin Berresford

Executive Director of People and Culture
Martin joined Our Future Health in January 2022 and leads on our people strategy, ensuring alignment between our mission and the evolving needs of our employees. Before joining Our Future Health, Martin’s early career focused on scaling technology organisations internationally, building high-performing teams and fostering collaborative work environments. Later, he transitioned to the life sciences and research sectors. In both fields, he has applied his HR expertise to create employee-centric environments, enhancing team performance and engagement across diverse industries. Martin is a Chartered Fellow of the Chartered Institute of Personnel and Development (CIPD), reflecting his commitment to progressive and responsible HR practices.

Dr Ghazanfar Khan MBChB (Hons) MRCGP MSPH

Interim Executive Director of Digital Health and Deputy Chief Medical Officer
Ghazanfar is a medical doctor and global health professional with expertise in health systems and digital health implementation. He led key initiatives for the World Health Organization and is Faculty Affiliate at the Harvard Medical School Center for Primary Care, supporting the Harvard Healthtech Fellowship programme. He is a Member of the Royal College of General Practitioners and holds a Masters in Public Health with Distinction from the London School of Hygiene and Tropical Medicine.