Mr. Oliver Diez was born and raised in Miami, FL, where he graduated from Hialeah Miami Lakes Senior High School. He earned his Bachelor’s and Master’s Degrees in Music Education from Florida International University. He is currently in his 26th year at Palmetto Elementary, where he teaches General Music to students in grades K-5 and is also the director of bands and chorus. In 1999, he was voted Palmetto Elementary's "Rookie Teacher of the Year," and in 2002, he was named "Teacher of the Year." In 2019, he was selected as the 2020 Miami-Dade County Public Schools District Teacher of the Year. Mr. Diez has been nominated twice for the "Grammy Music Educator Award" and has been a "Who's Who in Education" nominee. He directed the Superintendent's Honors Recorder Ensemble in 2007 and again in 2018. He also received a proclamation on June 7, 2011, from the mayor of Pinecrest declaring that date "Oliver Diez Day." In October of 2021, he received the Key to the City of Miami from Mayor Francis Suarez.

Mr. Diez has established an active music program at Palmetto Elementary, which consists of a Beginning Band, Concert Band, Jazz Combo, a Drumline, a Chorus, and two levels of String Orchestra. All this is accomplished before and after school hours. He has had fourth and fifth graders chosen for both the All-State Elementary Chorus and the All-State Orff Ensemble (2006-2025), as well as for the Superintendent's Honors Festival in Chorus, Bell Ensemble, Recorder Ensemble, Middle School Concert Band, and Orchestra. His groups have received 1st and 2nd place, along with Choral/Instrumental Grand Champion titles at Orlando's Music U.S.A. Festival since 2002. They have also received various Superior ratings in Concert Choir, Concert Band, Show Choir, and Jazz Band at the Music U.S.A. Festival. In 2017, his elementary concert band performed alongside the F.I.U. Wind Ensemble. His group has also performed at Miami Marlins and Miami Heat games, as well as various community events. His concert band and chorus students were honored in 2019 when they were invited to perform at Carnegie Hall in New York City.

Oliver has played baritone saxophone in the Miami Wind Symphony since its inaugural season 2011. He directed the "Young Sousas" in the Greater Miami Youth Symphony for nearly ten years. He is a member of the Florida Music Educators Association, Florida Elementary Music Educators Association, and Florida Bandmasters Association, and was chosen as an FMEA Emerging Leader in 2017.

Mr. Diez has been married to his wife, Alina, for 18 years, and they have two sons, Oliver (17) and Matthew (14).