Justin Meldal-Johnsen (born March 26, 1970) is an American producer, songwriter, bassist, multi-instrumentalist and musical director. Born in Eugene, Oregon, he is best known for his work with Beck, Nine Inch Nails, M83, Air, and St. Vincent.
Meldal-Johnsen served as the touring bassist, guitarist, and keyboardist for Nine Inch Nails between 2008 and 2009, and was Beck's longtime bassist and musical director starting in 1996 and continuing until mid-2016. In 2021, he began work as bassist/keyboardist and musical director for St. Vincent.
He has recorded with many other artists including Garbage, The Mars Volta, Frank Ocean, Dixie Chicks, Tori Amos, Dido, Charlotte Gainsbourg, Goldfrapp, Blood Orange, Pete Yorn, Turin Brakes, Marianne Faithfull, Ladytron, and more. As a producer, Meldal-Johnsen has worked with M83, Paramore, Metric, Tegan and Sara, Jimmy Eat World, The Naked and Famous, School of Seven Bells, Neon Trees, Young the Giant, Ken Andrews, Division Day, and more.