Rob Dietz is a multiple award-winning singer and vocal percussionist who has been arranging, composing, teaching, and performing contemporary a cappella music for over twenty years. Based in Los Angeles, Rob is best known for his work as an arranger and group coach for NBC’s
The Sing-Off. Through his work as an arranger, Rob has had the pleasure of collaborating with some of the top talent in the vocal music world including Grammy award-winning groups Pentatonix and The Swingles, Voiceplay, Kings Return, and many more. He has been a contributing arranger for performances by world renowned artists including Smokey Robinson, Flo Rida, Sara Bareilles, Incubus, and Pat Benatar. His arrangements have been featured on several TV shows, including
America’s Got Talent (NBC),
To All The Boys: P.S I Still Love You (Netflix), and
Pitch Slapped (Lifetime).
As a performer, Rob is an award-winning vocal percussionist, and his distinctive sound has been featured on several TV shows, including FOX's Glee and The Late Late Show with James Corden. Rob was the founding vocal percussionist for both The Funx and Level, groups that gave him the opportunity to work with legendary performers including Jay Leno and Demi Lovato.
Rob has a deep passion for a cappella education, and is a founding co-director (along with Ben Bram and Avi Kaplan) of
A Cappella Academy, as well as the founding director of Academy Choir: Los Angeles. He is a sought-after presenter and clinician who has led vocal music workshops at events such as the National A Cappella Convention and the ACDA National Convention. Rob has directed several contemporary a cappella honor choirs at conferences including the Southwest ACDA regional conference (2024), the Pennsylvania Music Educators Association’s state-wide conference (2024), and the Wisconsin Choral Directors Association state conference (2025). He is the author of
A Cappella 101: A Beginner’s Guide to Contemporary A Cappella Singing, published by Hal Leonard.
Alongside his work in contemporary a cappella music, Rob is an avid choral composer, with work published by Alfred Music Publishing, Hal Leonard, Heritage, and GIA Publications. In 2021 his piece “The Gift” received a jury commendation as part of the King’s Singers New Music Prize competition. His pieces continue to be performed by choirs from all over the world. Rob currently serves as the national repertoire and resources co-chair for Contemporary/Commercial music for the American Choral Directors Association (ACDA).
