RUBEN VALENZUELA is the Founder and Artistic Director of the Bach Collegium San Diego (BCSD). As a conductor, keyboardist, and musicologist, he has led BCSD in numerous notable performances of music of the Renaissance, early and high Baroque, through the early Classical period. His performances have been described as ‘dramatic’ and ‘vibrant’ and ‘able to unlock the true power of Baroque music’ (SanDiegoStory.com). Under Valenzuela’s leadership, BCSD has achieved local, national, and international acclaim, through highly charged virtuosic performances of iconic repertoire, in addition to lesser-known works. In 2012, he was chosen by San Diego Metro Magazine as one of 'Twenty Men Who Impact San Diego' for his outstanding work with BCSD, and his ongoing contributions to the San Diego arts community.

As an organist and accompanist he has toured throughout England, Northern Germany, and Northern Spain. With BCSD he has toured to the Festival Internacional del Órgano Barroco in Mexico City and Zamora, Michoacán, and to the Festival Internacional de Música Renacentista y Barroca Misiones de Chiquito in Bolivia. Recently, he has appeared as guest conductor with Bach Vespers at Holy Trinity, New York City, Marsh Chapel Choir and Collegium at Boston University, and Bach at Emmanuel Church, Boston. Additionally, he has served as principal continuo for Orquesta Sinfónica de Minería, Mexico City, and the Louisiana Philharmonic Orchestra for their performances of J.S. Bach's St. John Passion

As a musicologist, Valenzuela has undertaken research at the Centro Nacional de Investigación, Documentación e Información Musical, Carlos Chavez (CENEDIM), and has also conducted research at the Archivo del Cabildo of Mexico City Cathedral focusing on the basso continuo in Novo-Hispanic music (1680–1750). In 2016, he presented a paper titled: Mexican Religious Iconography (Angels musicians and the Basso Continuo in Mexico City Cathedral) for the Historical Performance Institute of the Jacobs School of Music, Indiana University. Currently, he has focused his research on the music and life of Anglo-Canadian composer Healey Willan, which saw the formation of Willan West 2018 to mark the fiftieth anniversary of the death of the composer. The year long music festival produced a series of fourteen liturgical events and two concerts with the aim of performing  Willan's choral music in its proper liturgical context. 

Valenzuela brings many years of experience as an organist and choirmaster in the Anglican 

tradition. He is a member of the Association of Anglican Musicians, American Musicological Society, American Bach Society, Herbert Howells Society, Royal School of Church Music,

and the American Guild of Organists. He holds a PhD in Musicology from Claremont Graduate University and is the Director of the Music & Organist of All Souls' Episcopal Church, San Diego, and the Choral Director of the La Jolla Symphony Chorus.