Guillaume Tarel joined the ORDECSYS team at the beginning of 2012. He holds engineering degrees from Ecole Centrale (Paris) and Ecole Polytechnique Férérale (Lausanne). He also has a PhD in Physics from EPFL. He wants to promote optimization in Energy and Environmental modeling, and more generally to OR applications in Industry and large Orgnaizations. ORDECSYS is very happy to welcome him.