VARSITY

2026 ROSTER
* Senior
COACHES

Olivia Diaz
Varsity Head Coach
Coach Olivia Diaz is a Centennial High School alumnus, graduating in 2019 after a standout playing career. She continued her volleyball journey at the University of North Carolina Chapel Hill, where she competed for four years, serving as a team captain and earning recognition as a Tar Heel Leader of Distinction.
After college, Olivia began her coaching career with A5, spending two years as an assistant with the nationally competitive 18-1 team before transitioning into her current role as assistant coach for A5's 12-1 program. In 2024, she joined the Alpharetta High School staff as an assistant coach, helping lead the team to an undefeated season and a state championship title. The following year, she stepped into the role of head coach, guiding Alpharetta to a state runner-up finish. Olivia is excited to return to Centennial and give back to the volleyball program!

Melanie Colbert
Community Coach
Melanie Colbert is excited to be joining the volleyball program at Centennial High School for the upcoming season. She brings about six years of playing experience as a libero/defensive specialist (DS) before transitioning into coaching, where she discovered her passion for developing athletes and helping teams grow. She began her coaching journey in the fall of 2017 and has since worked with middle school feeder programs, competitive club teams at A5 Volleyball Club, and spent three seasons coaching varsity athletes at North Gwinnett High School.
Melanie has also coached multiple clinics and camp series at A5 Volleyball Club and, in many ways, considers the facility a second home. Over the years, she has coached multiple teams that have qualified for USAV Nationals, one of the most prestigious tournaments in club volleyball, as well as teams that have medaled and won multiple qualifiers. She has also helped lead high school programs to Elite Eight and Final Four appearances in the GHSA state tournament. She is excited to continue developing the next generation of athletes and helping them accomplish any goals they set out to achieve.















