In today’s business world the importance of Human resource management (HRM) is developing significantly. Human resources comprise the entire knowledge, skills, abilities, creative possibilities, motivation and loyalty which are at the disposal of an organisation or society. HR are the entire intellectual and spiritual energy that an organisation can mobilise in the realization of its goals and business development. Due to the importance of Human Resource in running an organisation, managing human resources is the most important management task and principal standard for evaluating a manager’s personal excellence. Excellent world organisations aim at employee education and development in order to make use of their knowledge and skills to advance business development and growth. Planning a company’s educational needs is part of the company’s general development planning, respectively its strategic planning. Companies which are highly specialized in a certain field prefer internal education since their experts are best acquainted with the work technology. Sharing knowledge within the company is a key element of their long-term success. Croatian Post (Hrvatska pošta) is an example of a company which continuously invests in employee education and development, as knowledge, skills and abilities are a pledge of the company’s success. Knowledge acquired in this way remains an employee’s ‘permanent property’. HRM department organises a whole range of internal training designed for all Croatian Post employees. Educational training programs are formed in accordance with the needs of individual business fields. Internal training is planned within a system whereby individual organisation units and divisions represent the client. Training is performed by Employment and Development Department employees ─ internal trainers. Croatian Post has organised mentorship for newly employed postmen to introduce them to their job. Postmen mentors are ambitious persons willing to confront everyday challenges, recognized as such in the psychological evaluation of resources. These mentors have achieved best results in the expertise examination and work efficiency evaluation. With the establishment of it’s own Development Centre Croatian Post aims to make use of it’s own forces, the best and most efficient employees, for the future business challenges. Employees recognized for their high potential and excellence are supported and guided in their development. In this way, the company creates leaders on whom it can rely to build its future.