Her most recent film, The Reagan Show, an all-archival documentary which she co-directed with Pacho Velez, played at the Tribeca Film Festival and the Locarno Film Festival in 2017. She produced the Academy Award-nominated documentary Cutie and the Boxer, which also won a News & Doc Emmy Award for Best Documentary. Town Hall, her feature-length documentary, co-directed with Jamila Wignot, broadcast nationally on PBS in 2014. She was the associate producer of several Emmy-nominated historical documentaries for HBO and PBS, and the archivist on Jim Jarmusch's Gimme Danger (Cannes 2016), Mike Mills' 20th Century Women (NYFF 2016), Robert Greene's Kate Plays Christine (Sundance 2016), and Matt Wolf's Teenage (Tribeca Film Festival 2013), amongst many others. Her writing on film has appeared in frieze magazine, IDA Magazine, and The Talkhouse. Sierra's next project, Riotsville, USA, is currently in development.