Marchiando appeared as Principal Trumpet with the New Mexico Symphony Orchestra from 2006 until its untimely demise in 2011, and has also held positions with the Phoenix Symphony and Arizona Opera. He has performed as Guest Principal Trumpet with the Tucson Symphony Orchestra and Santa Fe Symphony, and has appeared with many other notable ensembles, such as the Santa Fe Opera, Fountain City Brass Band, Santa Fe Chamber Music, Chatter 20-21, Santa Fe New Music, and the Figueroa Music and Arts Project. A committed music educator, Marchiando has given master classes and clinics worldwide, including at renowned institutions such as the National Trumpet Competition, International Trumpet Guild Conference, Thailand Brass and Percussion Conference, and the Rafael Méndez Brass Institute He has served as adjudicator for the National Trumpet Competition, International Trumpet Guild Solo Competition, International Women's Brass Conference Solo Competition, and for state competitions and festivals in New Mexico and Arizona. John also appears regularly as a clinician at high schools across the southwest, and is a S.E. Shires/Eastman Music featured clinician. Previously, Dr. Marchiando held positions on the faculties of the University of Toledo and Arizona State University. Active as a soloist, John has performed with ensembles across the globe, including appearances with the Summit Brass, Denver Municipal Band, New Mexico Philharmonic, United States Navy Band, Santa Fe Symphony, Albuquerque Concert Band, and the Atlantic Brass Band.