In his film career Moschin alternated character roles and, more rarely, leading roles, such as in Seven Times Seven and Caliber 9. His most famous role is that of Rambaldo Melandri in the Amici miei film series (1975–1985). He won two Nastro d'Argento Awards for Best Supporting Actor, in 1967 for Pietro Germi's The Birds, the Bees and the Italians and in 1986 for Nanni Loy's Amici miei – Atto III. Moschin is also well known for the role of Don Fanucci in Francis Ford Coppola's The Godfather Part II.