Have you considered adding a column to the Emp sheet that concatenates employee name and title, copy the formula down, select the cells with the formula and define a name, for example, "empNameAndTitle". On the TS sheet in cell C6, add data validation, choose List, and the source should be "=empNameAndTitle" without the quotes.
Formula in column F:
Code:
=A4 & " " & B4 & ", " & C4