He previously spent three seasons as an assistant director of football operations involved in offensive quality control and two years as a graduate assistant coaching the tight ends and offensive special teams.
The 2008 Tarleton State graduate joined the Baylor staff following a two-year stint coaching inside receivers at Red Oak (Texas) High School.
The former quarterback played collegiately at SMU for Baylor defensive coordinator Phil Bennett and was an all-state honoree at Ennis (Texas) High School. Wallis was a two-year letterman at SMU (2002-03), and started seven games and threw for 834 yards as a redshirt freshman in 2002. He also spent time at tight end as a redshirt in 2001.
Wallis led Ennis High to the 2000 4A state championship as a senior, when he threw for more than 3,600 yards and 37 touchdowns and ran for 1,200 yards and 12 touchdowns. He was named to the 2000 4A All-State second team both by The Associated Press and THSCA.
Also a 4A All-State and District 10-4A MVP in baseball at Ennis, Wallis was selected in the 2001 MLB Draft by the New York Yankees.
Wallis and his wife Jessica are the parents of one son, Mason.