Ratliff began her career in public service in 1991 as a paralegal in the Jefferson County Commonwealth Attorney's Office where she specialized in white collar crime investigations.
In 2002, Tiffany joined the Department of Corrections as a classification and treatment officer in the assessment center at Roederer Correctional Complex (RCC). In 2005, she was promoted to unit administrator I at RCC. She was then promoted to program administrator in 2006 in central office, where she worked in the classification branch. In 2008, Ratliff returned to RCC where she worked as unit administrator in the assessment center and as the institution's pre-release coordinator. She was later promoted to unit administrator II where she worked with the RCC permanent population, providing oversight for GED and college programs, pre-release, and visitation. She also served as grievance coordinator.
Ratliff returned to the assessment center in 2010 and was promoted to program administrator over the assessment center in April 2011. In 2012 she was promoted to Deputy Warden at Luther Luckett Correctional Complex.
A graduate of Eastern Kentucky University with a bachelor's degree in paralegal science, Ratliff is also a 2007 graduate of the Commissioner's Executive Leadership Program.