Wallace came to Purdue after spending the previous season as the tight ends coach at Austin Peay. The Governors finished third in the Ohio Valley Conference in rushing in 2016 and broke the school record for total offense multiple times last year. According to 24/7 Sports, Austin Peay signed the No.1 recruiting class in FCS with Wallace on staff.
Previous to Austin Peay, Wallace spent three seasons as a graduate assistant at Western Kentucky, where he worked directly with the tight ends under Brohm in 2014 and 2015 and with the offensive line in 2013 under Bobby Petrino. In 2015, the Hilltoppers won the Conference USA championship, Miami Beach Bowl and finished 24th in the final Associated Press Poll. WKU finished that season first in the nation in passing touchdowns, fifth in passing yards and scoring and eighth in total offense. The season prior, WKU broke 47 offensive school records, finished first in the country in passing touchdowns, second in passing yards, fourth in total offense and sixth in scoring. Tight ends Mitchell Henry and Tyler Higbee earned all-conference honors in 2014 under Wallace's guide, with Higbee going on to be selected in the fourth round the National Football League Draft by the St. Louis Rams in 2015.
Wallace (born March 5, 1990) played two seasons of tight end at WKU (2011-12) and one year as an offensive tackle at Kentucky (2010). He earned a bachelor's degree from WKU in political science (2013) and a master's degree in sports administration (2015).