An advanced direct mail business opportunity is to become a direct mail copywriter. Direct mail copywriting deals with the content portion of direct mail--that is, the text that presents itself on brochures, booklets, direct mail post cards and sales letters. This direct mail job within a direct mail agency is an interesting profession that requires breadth of knowledge and marketing savoir faire.
Other direct mail business opportunities include direct mail campaign manager (who deals more with the business end than the writing), direct mail statistics processor and sorter in a direct mail house. Direct mail processing entails a background in mathematics, economics and finance.
To work in a direct mail agency as a professional direct mail copywriter or otherwise is to immerse oneself in an exciting and expanding field of advertising.