Professor Brennan has been in University College Dublin (UCD) since 2000, as a Research Fellow, Career Track Investigator, Lecturer, Senior Lecturer, and, since 2015, Professor. Previously she was a postdoctoral fellow in Instituto de Tecnologia Química e Biológica in Portugal and a visiting scientist in the University of Cambridge, and was educated in Trinity College Dublin and the University of Southampton. Professor Brennan is at the forefront of nutrition and metabolomics research, running the Nutrition, Biomarkers, and Health research group (www.ucd.ie/nutrimarkers), obtaining considerable national and European research funding (over €6 million as PI), and publishing numerous peer-reviewed articles. Recent funding successes have included a European Research Council (ERC) Consolidator Award for the project ‘A-DIET: Metabolomics based biomarkers of dietary intake – new tools for nutrition research’ (2015-2020; €1.9 m). Professor Brennan led UCD’s inputs into Joint Programme Initiatives (JPIs) in the areas of ‘A Healthy Diet for a Healthy Life’ and ‘Biomarkers for Nutrition and Health’. Professor Brennan has supervised 13 PhD students and two Masters students to completion as Principal Supervisor. She has been Director of the European Nutrigenomics Organisation since 2014, and is currently Secretary of the Irish Nutrition Society. Professor Brennan has acted as an external examiner for several PhD vivas and has given more than 20 invited conference presentations. She reviews numerous manuscripts, including for leading journals such as Nature, Journal of Proteome Research, OMICS, PLoS ONE, PLoS, Analytical Biochemistry, American Journal of Physiology, AJCN, BJN. Her publications have obtained over 6,000 citations, and a h-index of 39. She is also involved in developing the incorporation of research into teaching, and a range of outreach activities.