HYRIAK, Marek: Marketing and Investment decision making of an enterprise. [Diploma thesis]. Technical University in Zvolen, Department of Economics, Management and Business. Supervisor: doc. Ing. Josef Drábek, CSc. Academic degree: Engineer, study program: Economics and Management of Natural Resources. 2019. 67 p.The aim of the thesis is to design competent marketing and investment resolution to create sales representation for pumping equipment in Eastern and Western Slovakia. The first part of the thesis is dedicated to the theory and it deals with marketing and investment decision making structure of an enterprise. Methodology of diploma thesis uses chosen static and dynamic methods to evaluate efficient decision making. The second part of the diploma thesis is practical part, where we processed company's goal to extend sales representation for commercial pumping equipment. The last part of the thesis points out an options and risks linked with the extension of the sales representation.