William Seiji Marsh is a multi-genre guitarist, singer, bassist and music mindset coach based in the Los Angeles area.  Prior to relocating to Southern California, he contributed his guitar skills to many of Oregon’s staple and up-and-coming artists.  William thrives on variety in his career, and as a result has developed a wide stylistic range.  He currently performs internationally with Portland’s crossover classical/jazz/pop polyglots, Pink Martini; as well as genre-bending powerhouse singer/guitarist/whistler, Edna Vazquez.  In the past he has toured and recorded with platinum-record-selling swing/rock outfit Cherry Poppin’ Daddies; Portland’s indie-rock favorite, Lost Lander; and Billboard-topping singer and songwriter, Halie Loren.

William is passionate about supporting the members of his music community through music mindset education and coaching. Before shifting his educational process toward coaching, he maintained a private guitar studio in Portland’s prestigious Falcon Art Community, and has been on the guitar faculty at Willamette University in Salem, Ore. and Reed College in Portland, Ore.  William co-owned/-directed Harmony Roadhouse Music Studios in Eugene, Ore., where he also maintained a private studio.

William is an avid builder and tinkerer.  In his spare time, he enjoys building and modifying music electronics, including guitar effect pedals and tube amplifiers.  William enjoys spending time in the outdoors with his beloved dog, Penny, when he has the opportunity.