Mr. Mojica is the pianist for the Mountainside Master Chorale (Upland), a semi-professional community choir; presenting concerts with various venues such as Pacific Chorale and Pacific Symphony, Doc Severnson, and the movie soundtrack "Goodbye Lover", In addition, Mr. Mojica is the pianist/organist for Pueri Cantores of San Gabriel Valley (PCSGV), a professional children's chorus that had audiences/performances for Pope John Paul II and Pope Benedict XVI. Other concerts (PCSGV) have included performances in Krakow, Poland, Washington D.C., and Rome, Italy. Mr. Mojica contributes as Music Director/Pianist for various Civic Light Opera houses and Musical Theater venues in the Southern California prefecture; with performances at Fullerton Civic Light Opera and Whittier Community Theater.
Mr. Mojica has served as pianist for vocal organizations; American Choral Directors Association (ACDA), California Music Educators (CME), Southern California Vocal Association (SCVA), International Association of Jazz Education (IAJE), and National Pastoral Musicians (NPM). Mr. Mojica has accompanied Regional and All State Honor Choirs as well as a 2005 Carnegie Hall performance, Salzburg, Austria; Music International Eistedfod, Llangollen, Wales; 2004 European Grand Prix (Choral), Gorizia, Italy, and Italy Tour, with concerts in Rome, Florence, and Venice, all with Chamber Singers. Mr. Mojica has accompanied "Singcopation" in their IAJE performances in Long Beach, CA., New York City, NY., Toronto, Canada, and Honolulu, Oahu. He has performed in concerts in Banff, Canada as well as competition events such as Reno Jazz Festival, Monterey Jazz Festival, and Fullerton Jazz Festival. Mr. Mojica has also appeared with "Frontline" for the annual Reno Jazz Festival and "Spring Thing" concert.