Tesoro's choral music department under the leadership of Keith Hancock has also been recognized as one of top choral programs in Southern California, being selected as a 2015 Grammy Signature School for Excellence (one of five in the nation) and having received an invitation to perform at the 2012 and 2016 American Choral Directors Association Western Division Conferences. In 2013, Tesoro's Madrigals performed the world premiere of "Un Tesoro Perfecto", by composer Luke Mayernik, at Carnegie Hall in New York. The Tesoro Madrigals won the Golden State South Choral Competition in 2008 and A Cappella won in 2010. In 2005, 2010, and 2011, Tesoro's Barbershop Quartet placed first in the Barbershop Harmony Society Far Western District High School Quartet Championship. The choir has performed extensively throughout Southern California, as well as Spain, Germany, Austria, Switzerland, England, Ireland, and Mexico. The choir has never received less than a superior rating at an adjudicated festival. In 2017, out of more than 3,300 nominations nationwide, choir director Keith Hancock became the recipient of the 2017 Music Educator Award and was named Grammy Educator of the Year, presented by The Recording Academy and the GRAMMY Foundation.