Born in 1989 in the southern French Alps, Giacometti devoted himself to journalism and photography after a career start as a chef. He published his first novel, Puisque chante la nuit (Because the night sings), in 2013. In 2018 he moved to Marseille and started working for the national and international press: Le Monde, Libération, The Guardian, etc. He is a member of Studio Hans Lucas, a platform for freelance photographers and photo agency. In 2022 he was awarded the Mondes Nouveaux grant by the French Ministry of Culture.