Tammie Sims moved to Texas in 1972 from Illinois. In 2000, She received a B.A. from Dallas Baptist University in Business Administration and Christian Ministries. Tammie has worked in litigation for 28 years in Texas, Kansas, Missouri, and California. She has a Paralegal Certificate through the State of California. She joined the firm in July 2018.

Tammie is mom to two sons and one daughter, and grandmother to four boys and one girl. She lives in Denison, TX with her cat, Fancy Pants.