The European Commission has outlined the direction of achieving climate neutrality by 2050. and is taking a series of strategic steps to achieve this goal. Green transition is included as a term in the strategic planning processes of all European Union members. Switching to clean energy, encouraging green and blue investments, decarbonization, efficient use of resources, etc. are just some of the elements of the green transition. Achieving sustainable development and economic growth based on a low-carbon strategy strongly affects all levels of the economy, starting with the energy sector. The indisputable result of the green transition is an even higher demand for electricity. Studies show that global energy demand could increase by up to 25% by 2040 with a concomitant increase in greenhouse gas emissions. Consequently, manufacturers of equipment and solutions in the power system face the following challenges: 1. ensure the expansion of the network for reliable transmission and distribution of the growing demand for electricity. 2. reduce the carbon footprint by providing environmentally friendly products 3. to stabilize the fluctuation in the network resulting from the increasing intake of renewable energy sources Energy transformers are one of the most important components in the energy value chain towards a successful energy transition. They are an indispensable part of the power system and necessary for the transmission and distribution of energy over longer distances. The transformer tank is a passive part of the transformer that does not participate directly in energy transmission, but with its action it improves energy efficiency and facilitates the use of the transformer itself. The focus of this thesis is to show the impact of the green transition on the growth of demand for energy transformers, and thus the production of transformer tanks (metal parts of transformers). This greatly changed the circumstances in the part of the metal processing industry, which focused its production on the energy sector. An environment is being created in which, after a series of crisis years, manufacturers of transformer tanks have become a desirable and important factor in the power chain. Opportunities are created for investment, employment, the introduction of new technologies and the creation of sustainable business in the metalworking industry. The strong growth in demand for transformers due to the green transition was accepted and used by the company Končar - Metal Structures Ltd.. The transformation of the business was achieved through innovations in production processes, optimization of resources and adaptation to market trends, which enabled the Company to successfully overcome previous challenges and win new market opportunities and lay a solid foundation for sustainable growth and longterm success. The expansion of production capacities through the new cooperation with Siemens Energy (JV – Joint Venture) proves that the green transition is an opportunity for all metal processing companies for sustainable business and growth in the transformer tank market.