After college, Martini found steady work in film and television projects. His film roles include co-starring opposite Jodie Foster in Robert Zemeckis' "Contact" as Willie, a fellow scientist with an affinity for brightly colored shirts, and sharing the screen with Tom Hanks and Matt Damon in "Saving Private Ryan" as Corporal Henderson, ranking NCO of Pfc. James Ryan’s unit, who helped Cpt. John H. Miller and his men in the brutal final shootout of the film. Martini later co-starred in John Dahl's "The Great Raid" as 1st Sgt. Sid Wojo.