He is the founder and the director of the Swiss Club of Press. After his professional start on the pages of Journal de Geneve, Mettan cooperates with different magazines and reviews until becoming the editor-in-chief of a prestigious newspaper Tribune de Geneve. Then he starts his political activity joining the PDP central movement (Popular Democratic Party) and becomes the municipal counselor of Geneva. Guy Mettan is the author of numerous books on the history of his city.