The principal holds an equity position and has major business responsibility for a firm having employees
A creative director or design director is the creative head of a design firm, advertising agency or an in-house corporate design department. In all of these areas, key responsibilities can include the development of graphic design, advertising, communications and industrial design publications.
The art director establishes the conceptual and stylistic direction for design staff and orchestrates their work, as well as the work of production artists, photographers, illustrators, prepress technicians, printers and anyone else who is involved in the development of a project. The art director generally selects vendors and, if there isn’t a creative director on staff, has final creative authority.
The senior designer is responsible for conceptualization and design of solutions from concept to completion. In some firms, a senior designer directs the work of one or more junior designers who generate comps and create layouts and final art. In some cases, senior designers do not manage staff but are designated “senior” because of their authority in design decision-making.
Junior designer is one-to-two years out of school and requires mentoring in all aspects of design conception and implementation.