Lain Tomlinson earned his B.S. in Mathematics and B.Mu. in Vocal Performance from Cumberland University in 2014, graduating with honors, and he earned his M.S. in Mathematics with an emphasis in Data Mining from Tarleton State University in 2016, where he worked as a research assistant. After receiving his M.S., Mr. Tomlinson worked at Cumberland University as an adjunct Mathematics instructor until 2018, when he was hired as a full-time instructor. He returned to the adjunct academic status in 2022. In addition to working at Cumberland, Mr. Tomlinson has also worked as a Mathematics Teacher at Wilson Central High School (2017-2018) and as a Publications Assistant for the Tennessee Secretary of State (2014-2015), where he helped edit the 2015-2016 Tennessee Blue Book. He has also been a private math tutor since 2008.

Outside of Cumberland, Mr. Tomlinson also serves at Beckwith Missionary Baptist Church and has preached at different places throughout Middle Tennessee and Texas. He also plays and provides lead vocals in a local band, Lain Tomlinson & The Lost Troubadours, as well as performing solo.