Jack Endino is an American producer and musician based in Seattle, Washington. Long associated with Seattle label Sub Pop and the grunge movement, Endino worked on seminal albums from bands including Mudhoney, Soundgarden and Nirvana. He was also the guitarist for Seattle band Skin Yard, which was active between 1985 and 1992. He played guitar in Sky Cries Mary on three albums, from 2018-2024.