Lisa Lassek is an American film and television editor whose credits also include her role as an associate producer for the television series Firefly. She has edited episodes for the sixth season of Buffy the Vampire Slayer, served as an assistant editor for Angel, and has edited various episodes of Firefly. Lassek is a frequent collaborator of Joss Whedon having edited his first feature-length film Serenity and the Marvel Cinematic Universe films, The Avengers and Avengers: Age of Ultron which she co-edited with Jeffrey Ford. Lassek is a native of Philadelphia, Pennsylvania and is an alumna of Vassar College and Boston University.