Cat is an NIHR Clinical Lecturer in Public Health Medicine at the Institute of Health Informatics at UCL and specialty registrar (ST5) in London. She is also an Honorary Lecturer at King's College London and The George Institute for Global Health, UK, in partnership with Imperial College London. She is also an NIHR ARC NWL Improvement Leader Fellow in the 2023 cohort.

She completed medical school in Portugal in 2012 and moved to the UK inspired by her dream of working for the NHS. Although she initially started her specialty training in Cardiothoracic Surgery in Manchester, her long-term illness forced a sharp turn in her career. She completed her DPhil in the University of Oxford, simultaneously with an MSc in Public Health at King's College London. She started her specialty training in Public Health in August 2020 as NIHR Academic Clinical Fellow at King's College London.

She has an insatiable curiosity and broad research interests, which explains why she has been involved in many different types of research over the years. She has finally committed to her two passions: climate & air pollution and health and gender inequalities. She co-leads the implementation of the Climate & Health Strategy with the Climate & Health Committee of the Faculty of Public Health; is chair of the Specialty Registrars’ Committee, which represents registrars nationwide in the Faculty of Public Health; and co-chair of the Academic Public Health Special Interest Group, which she co-founded in 2022. In addition, she is committed to Public Health education and has been actively teaching in the MPH at King's College London and University College London since 2020. She is also leading the European course on climate & health organised by the Association of Schools of Public Health in the European Region (ASPHER), as she is member of the working group on climate and health.