Guerric Péré has degrees from the École nationale supérieure du paysage de Versailles and Urbaniste SFU. Since 1996, he has been teaching at the Marseille campus of the École nationale supérieure de Versailles. He has also written extensively on the notion of urban nature. In 1987, in collaboration with Martine Rascle, Péré founded Ilex, a French landscaping firm. The multidisciplinary firm is involved in projects of various sizes, from the creation of urban public spaces to the design of territorial land-use plans.