Duby spent the last two seasons on the offensive staff at Mississippi State where he worked with wide receivers under head coach Jeff Lebby. Prior to 2024, Duby was on staff at the University of Oklahoma where Lebby was an assistant coach. While at Mississippi State this past fall, Duby assisted in MSU receivers averaging nearly 13 yards per reception, including Brenen Thompson snagging 57 catches for 1,054 yards. Mississippi State ranked seventh in the Southeastern Conference in yards per reception (12.9). Duby got his start in coaching at his high school alma, Amarillo, in Texas in 2019. Duby will guide a CU offense in 2026 that scored 29 points per game and averaged over 400 yards of offense in 2025.