Justin Trosper is an American singer, guitarist, and songwriter, born in Olympia, Washington. He fronted the post-hardcore band Unwound from 1991 to 2002. He has also been a member of bands such as Replikants, The Young Ginns, and Worst Case Scenario. Most of his work has been released on the independent record label Kill Rock Stars.Trosper has been a record producer for several Olympia-area bands, primarily at Unwound's self-built recording studio, MagRecOne.