A tannery employee is a Dyer, someone who dyes leather and other animal hides. They use a variety of techniques to color the hides, such as soaking them in vats of dye or painting them with brushes. The dyer must be knowledgeable about the different types of dyes and how to apply them correctly. They must also be able to identify any defects in the hides and make sure that the finished product meets quality standards.