Brandon Tillis was hired by Coach Waterman as a Assistant Men's Basketball Coach for the 2026–27 season with an emphasis on player development, he brings a diverse background spanning professional, international, and collegiate basketball.

Most recently, Tillis served as a Player Development Coach for the Shanxi FeiJiu Brave Dragons of the Chinese Basketball Association (CBA) through the 2025–26 season. Working with NBA and international talent including Hamidou Diallo, Daishen Nix, and Kyle Guy, he helped guide the team to the CBA Playoffs and a runner-up finish in the inaugural CBA Cup Championship. Tillis also played a key role in developing Chinese standout Jia Mingru, who earned CBA Sixth Man of the Year honors.

In 2024, Tillis was selected to join the Sacramento Kings California Classic coaching staff, gaining valuable experience alongside accomplished coaches including NBA champion Mike Brown, Doug Christie, Alvin Gentry, and Lindsey Harding.

From 2020–24, Tillis, co-led Wasserman's NBA Pre-Draft training classes alongside renowned skill development coach Olin Simplis, "The Guard Whisperer." During that time, he worked with elite prospects and professionals including Shai Gilgeous-Alexander, Evan Mobley, Stephon Castle, and Payton Pritchard, while also training NBA, WNBA, international, and collegiate players throughout the summer.

A four-year player at Sonoma State University, Tillis brings a unique combination of collegiate playing experience, professional player development expertise, and international coaching experience to the program.