She is the manager of the Data Journalism Awards, an international data journalism competition organised by the Global Editors Network. She is also the founder and director of HEI-DA, a data storytelling nonprofit promoting digital innovation, the future of data journalism and open data. Before launching HEI-DA, Marianne spent 10 years in London where she worked as a web producer, data journalism and graphics editor for Bloomberg News. She also created the Data Journalism Blog in 2011 and gives lectures at journalism schools, in the UK and in France.