Domenico Giambonini came from a family of gunsmiths, who supplied, among others, the Carabinieri of Bellinzona. In 1895, he won his first international championship in Lugano. At the 1912 World Championship in Biarritz, Giambonini was on the Swiss national team for the first time. His next international championships were at Viborg in 1914, Antwerpen in 1920, and Lyon in 1921. Amazingly, he achieved his lifetime best score in 1936 at age 68. From 1918-40 Giambonini was an instructor and coach and an influential official as vice-president of the Cantonal Federation of Competitive Shooters (FTST).