Mathieu is a research engineer at the Sciences Po Paris médialab since 2010. In the DIME-SHS Team he leads the web sub-project where he develops digital tools for the social sciences and provides support and advice in digital methods to scholars. His current research focuses on visual network analysis, digital methods and issue mapping. He initiated the Gephi network analysis software and is still developing it, notably through algorithms like ForceAtlas2, and he is currently developing the web crawler Hyphe. He was also strongly involved in the e-Diasporas Atlas program with Dana Diminescu from 2006 to 2010. He tweets at @jacomyma.