Agriculture Commissioner Sid Miller An eighth-generation farmer and rancher, Sid Miller is the 12th Commissioner of the Texas Department of Agriculture (TDA). He has devoted his life to promoting Texas agriculture, rural communities and the great state of Texas. Born in De Leon, in Comanche County, in September 1955, Sid Miller graduated with honors from Tarleton State University in Stephenville with a Bachelor of Science degree in Vocational Ag Education. A recognized community leader, Miller was first elected to the House of Representatives in 2000. He quickly earned a reputation as a staunch defender of Texas agriculture, constitutional freedoms and individual liberties for all Texans.