Giovanni Accornero, after studying guitar during his childhood, soon became interested in violin making, building his first instrument at the age of 18 under the guidance of luthier Pietro Gallinotti (Solero - Alessandria). In addition to building and restoring plucked instruments, he devoted himself to the restoration of stringed instruments, attending Arnaldo Morano's workshop and participating in restoration courses.
In 2002, he built a guitar for the "Palacio de la Guitarra" museum in Tokyo, the first Italian guitar to become part of this prestigious collection.
Collaboration with the most authoritative international researchers, organologists, restorers, scholars, experts and luthiers has enabled him to acquire a deep knowledge on the history of ancient and modern Italian stringed instrument making, especially Piedmontese, and his certificates of authenticity are now internationally recognized by collectors, musicians, public and private institutions.
He has also collaborated on countless publications and has been curator of important exhibitions of stringed and plucked instruments.
Since 2011 Giovanni Accomero has been a member of the association "Friends of Stradivari," which is engaged in activities aimed at popularizing stringed instrument making in the world, especially violin making from Piedmont and Cremona.
Since 2012 he has been the official advisor to the German foundation KulturFonds - Peter E. Eckes, active in patronage operations in the search and purchase of stringed instruments to lend to talented young musicians. The latter include violinist Bin Huang, violinist Giovanni Andrea Zanon and the Cremona Quartet.
In 2013, he was appointed conservator of the collection of historical musical instruments donated by Eng. Carlo Alberto Carutti to the city of Cremona, for which he edited the catalog, on permanent display at "Le Stanze per la Musica" rooms, of the Ala Ponzone Civic Museum in Cremona.
Since 2015 he has been an employee of the Lugano-based company MusicMasterpieces, committed to supporting talented young musicians through the Adopt a Musician initiative, managing the loan of string instruments from important private collections.