University of Kentucky official site has a quality control job posting that is set to expire Wednesday (3/14). Pure speculation on my part, but I believe this position will be for the defense. When Coach (Brian) Landis left Kentucky to become Frederick Douglass High School Football Coach, the void was filled in by Dillion Sanders. Sanders has since been promoted to a defensive graduate assistant.
As for who Mark Stoops and UK will target? I have no idea. Stoops likes to keep everything close to the vest. Whoever it is will be someone Stoops has trust in and experience helping the defense.