He was born in Rome on 11 February 1883, the son of Piedmontese general Pier Oddone Mondino and of Parmese marquise Beatrice Pallavicino.

On 1 June 1936 he was promoted to Brigadier General, becoming Chief of Staff of the Army Command of Turin; on 16 March 1939 he was promoted to Major General and on the following 1 September he assumed command of the 44th Infantry Division Cremona, stationed in Pisa and later moved to Ventimiglia and Sanremo.

[2][3][4] Following Italy's entry into World War II, on 10 June 1940, he participated in the offensive against France in command of the Cremona Division, which however was kept in reserve and not involved in the fighting.

[2][5][6][7][8] On February 12, 1943, he assumed command of the XXV Army Corps stationed in Elbasan, Albania, replacing General Giovanni Vecchi.

Mondino was then sent to Oflag 64/Z in Schokken, Poland, where he remained until February 1945, when he was freed by the advancing Red Army.