Ahairdresser's job is to organise hair into a particularstyle or "look". They can cut hair, addcolour to it ortexture it. A hairdresser may be female or male. Qualified staff are usually called "stylists", who are supported by assistants. Most hairdressing businesses are unisex, that is, they serve both sexes, and have both sexes on their staff.
Male hairdressers who simply cut men's hair (and do not serve females) are often calledbarbers.
Qualifications for hairdressing usually mean a college course, or anapprenticeship under a senior stylist. Some aspects of the job are quite technical (such as hairdying) and require careful teaching.