Jack E. Sandlin is a Republican member of the Indiana State Senate, representing District 36. He was first elected to the chamber in 2016. Sandlin served in the Indianapolis City Council in Indiana, representing District 24 from 2010 to 2016. He won the general election on November 3, 2015.

After graduating high school, Sandlin joined the Indianapolis Police Department, working there for over 20 years (with a break to serve in the U.S. Army). As part of his police work, he served on the Federal Drug Task Force and the Marion County Grand Jury, and he retired as the department's deputy chief of investigations. Sandlin went on to work as a law firm administrator at the firm of Harrison & Moberly, later deciding to start his own business in fraud examination, private investigation, and security consulting.

Sandlin holds an associate degree in criminal justice, a bachelor's degree in business, and an MBA.