Julien holds a master in History from Paris I University. He dedicated his master’s dissertation to the Parisian press in 1848, under the supervision of Prof. Vincent Robert. He has also worked on the democratisation of the French society in the mid-nineteenth century, through the circulation of a partisan press at low prices during a short period of abolition of censorship. He holds a master in Education and Teaching too. Since 2012, he teaches history in high-schools of Paris area. Within GMAP, Julien works on the patterns of major historical transformations.