The theoretical part of the thesis concerns the explanation of the term communication, introduces its functions, describes the communication process and various kinds of communication, and also deals with obstacles that may arise in communication. It lists various communication tools and instruments that help the internal communication within a company to fulfill its task. It points out that efficient communication is the essential prerequisite for the successful functioning of a company and helps to win employees' loyalty towards the employer and strengthen their motivation. The part of the thesis focuses on the communication level in the company - Atel Energy AG, organizational component. It includes actual evidence from the above mention...