Greg Leisz is a musician who has collaborated with many artists and bands, such as, among others, the Eagles, Robert Plant, Sheryl Crow, Emmylou Harris, Wilco, The Smashing Pumpkins, Bill Frisell, Tracy Chapman and Dave Alvin. Since 2008, Leisz is a member of a band called Works Progress Administration (W.P.A.). The group released their first album, WPA, September 15th 2009.