This article is dealing with one aspect of broader research of project approach in application of Lean Six Sigma (LSS), which is possible to use in different areas of business and industry as well. Practical experiences tell us that Lean Six Sigma methodology is not possible to be implemented without complete support of the top management, but more important, without qualified Lean Six Sigma personnel. This is one of the criticisms of Lean Six Sigma methodology, too much time and money are necessary for Lean Six Sigma experts, and these activities can take them away from their primary activities in the company. However, companies from this survey which successfully implemented Lean Six Sigma methodology specify that it is possible to do it with minimum costs. Roles of the staff implementing Lean Six Sigma methodology as: “Yellow Belt”, “Green Belt”, “Black Belt” and “Master Black Belt” are explained in this article. In this survey, we were aiming to increase a level of technical know-how and managerial skills within organisation with the main focus on management staff in company from domestic metalworking sector. This article proves the using of LSS tools and its application in metalworking oriented company from Bosnia and Herzegovina in order to improve product quality and process capability.