Mary Jo Markey, ACE, is one of Lost's film editors, under the auspices of Grass Skirt Productions, LLC. Markey was awarded a 2005 Emmy award for "Outstanding Single-camera Picture Editing" for her work in Lost.
Background
Markey has worked as an editor for the TV series Alias, Felicity, and Breaking News and the movies Medicine Man, and Bad Boy. She is a member of the American Cinema Editors and often works with J.J. Abrams on his television shows and movies such as Mission: Impossible