* A fashion designer conceives garment combinations of line, proportion, color, and texture. While sewing and pattern-making skills are beneficial, they are not a pre-requisite of successful fashion design. Most fashion designers are formally trained or apprenticed.
* A pattern maker (or pattern cutter) drafts the shapes and sizes of a garment's pieces. This may be done manually with paper and measuring tools or by using an AutoCAD computer software program. Another method is to drape fabric directly onto a dress form. The resulting pattern pieces can be constructed to produce the intended design of the garment and required size. Formal training is usually required for working as a pattern marker.
* A tailor makes custom designed garments made to the client's measure; especially suits (coat and trousers, jacket and skirt, et cetera). Tailors usually undergo an apprenticeship or other formal training.
* A textile designer designs fabric weaves and prints for clothes and furnishings. Most textile designers are formally trained as apprentices and in school.
* A stylist co-ordinates the clothes, jewelry, and accessories used in fashion photography and catwalk presentations. A stylist may also work with an individual client to design a coordinated wardrobe of garments. Many stylists are trained in fashion design. However, many are not and simply have a knack for pulling great looks together. They are also referred to as personal shoppers.
* A buyer selects and buys the mix of clothing available in retail shops, department stores and chain stores. Most fashion buyers are trained in business and/or fashion studies.
* A seamstress sews ready to wear or mass produced clothing by hand or with a sewing machine, either in a garment shop or as a sewing machine operator in a factory. She (or he) may not have the skills to make (design and cut) the garments, or to fit them on a model.
* A teacher of fashion design teaches the art and craft of fashion design in art or fashion school.
* A custom clothier makes custom-made garments to order, for a given customer.
* A dressmaker specializes in custom-made women's clothes: day, cocktail, and evening dresses, business clothes and suits, trousseaus, sports clothes, and lingerie.
* An illustrator draws and paints clothing designs for commercial use.
* A model wears and displays clothes at fashion shows and in photographs.
* A fit model aids the fashion designer by wearing and commenting on the fit of clothes during their design and pre-manufacture. Fit models need to be a particular size for this purpose.
* A fashion journalist writes fashion articles describing the garments presented or fashion trends, for magazines or newspapers.
* An alterations specialist (alterationist) adjusts the fit of completed garments, usually ready-to-wear, and sometimes re-styles them. NOTE: despite tailors altering garments to fit the client, not all alterationists are tailors.
* A wardrobe consultant or fashion advisor recommends styles and colors that are flattering to the client.
* A photographer photographs the clothes on fashion models for use in magazines, newspapers, or adverts.
* A fashion show producer is a person or firm that organizes runway/catwalk shows.

Article as seen on Wikipedia.