In 2005, Alemanni made her first TV appearance on The West Wing in the episode "365 Days" as an intern for White House Chief of Staff Leo McGarry. Her other notable TV credit was appearing as Amy Deckerman, a murder victim in "Doubt", the third-season premiere episode of Criminal Minds.
She appeared in two small films that were shown at film festivals in 2008, La Milonga and Sanctuary, neither of which received a theatrical release.
Alemanni was included among the cast of Mad Men as a winner at the 16th Screen Actors Guild Awards for Outstanding Performance by an Ensemble in a Drama Series. She was presented with an award along with other members of the cast.
Her first appearance on Mad Men was in the third episode of the first season, "The Marriage of Figaro". Alemanni appeared in three other episodes in the first season, but appeared only once in the second season. With her character having been installed as Don Draper’s secretary, she appeared in 11 of the 13 episodes of season 3.
