A marketer is a specialist who promotes a company's products and services. His goal is to build a sales system that will bring the company the most profit.
IT specialist is a creative profession. He creates something new, develops programs and applications, implements ideas
The financier is engaged in monetary transactions of various sizes and degrees of complexity, manages capital, regulates the financing of projects
Work with personnel - the specialist selects personnel, conducts interviews, organizes staff training, coordinates work to improve the skills of employees and develop their business careers.