Both the company and the Kostak group under the management, which is led by Miljenko Muha, have successfully implemented the basic premises from the management's work program in both terms. In the middle of the third mandate 2021─2025, the president of the board Miljenko Muha competently follows the strategy and manages the largest 30 million investment in his mandate - the construction of the modern Center for waste management in Spodnji Stari Grad.Miljenko Muha improved his knowledge and managerial skills on numerous training programs for managers, especially on finance and crisis management, and he also completed training for members of supervisory boards. He is also a member of many professional organizations and associations (Association of Employers of Slovenia, member of the management board of the Kayak Association of Slovenia, etc.). He speaks English, Croatian and Serbian.