YuMi Hwang-Williams made her debut at the age of fifteen as a soloist with the Philadelphia Orchestra, six years after having emigrated from South Korea . Today, she has performed Aaron Jay Kernis’ Lament and Prayer with the Indianapolis Symphony under the baton of Lawrence Leighton Smith, the Dvorak Violin Concerto with the Cincinnati Symphony Orchestra under the baton of Paavo Jarvi, and has made numerous solo appearances with Colorado Symphony Orchestra under the batons of Marin Alsop and Peter Oundjian, amongst others. In 2003, in an historic collaboration between the CSO, Marin Alsop, John Adams, John Corigliano and Christopher Rouse, at the CSO Contemporary Music Festival, Ms Hwang-Williams’ account of the Rouse Violin Concerto was proclaimed by the composer to be ‘the definitive version’. She has also performed the Rouse concerto at the prestigious Cabrillo Music Festival as well as Michael Daugherty's Fire and Blood for Violin and Orchestra.

Recent solo engagements include performances with the Santa Rosa Symphony under the baton of Jeffrey Kahane, the Fort Collins Symphony Orchestra with Wes Kenney on the podium, the Swarthmore Orchestra 2001 with Jim Freeman, and as soloist with the Colorado Symphony Orchestra with Peter Oundjian and with Christoph Campestrini. In November 2006 she will make her debut with the Basel Symphony Orchestra in Switzerland , playing the first violin concerto of Isang Yun, the great Korean composer, with Dennis Russell Davies on the podium.

Ms Hwang-Williams is an avid chamber musician and recitalist and has collaborated with such artists such as Gary Graffman, Ida Kavafian, and pianists Christopher O'Riley, John Kimura Parker, Robert Koenig and eminent pianist/conductor Dennis Russell Davies. She has been featured on National Public Radio and Colorado Spotlight

YuMi Hwang-Williams has served as concertmaster of the Colorado Symphony Orchestra (CSO) since 2000 and is concertmaster for the Cabrillo Music Festival. She is a faculty member of the Lamont School of Music at the University of Denver .