Svetomir Milinković graduated from the Faculty of Electrical Engineering in Serbia and, as a certified electrical engineer, moved with his family to Canada in 1974, where he lived until 1984. In Canada, he worked in industrial production for major international companies, gaining the valuable experience at General Motors, then a leader in the automotive industry. In 1984, he returned to Nova Pazova with the goal of starting his own company, focusing on mechanical processing.

• 1984.1989. – Svetomir Milinković opened four independent workshops for the production of metal spare parts for industry in Nova Pazova, each employing 7–10 workers. These workshops were later merged into a single production unit with over 30 employees, specializing in mechanical and electrical engineering—lathe operators, milling machine operators, and technicians. The business began producing and processing mechanical parts for major industrial systems such as Inex, Ilijaš Steelworks, Jesenice Steelworks, Belgrade Heating Plants, NIS Naftagas, NIS Engineering, and others.
• 1990. – The private company Energo-Sistem was established for domestic and international trade, as well as manufacturing, with full liability. Headquartered in Nova Pazova, the company began operations in a newly built facility of approximately 1,500 m². Its core activity was the production of devices and equipment for the implementation of national gasification programs. The company experienced significant growth in the number of employees, along with a continuous expansion of its business operations.
• 1991. – Svetomir Milinković recognized that the future of mechanical production lay in gasification and the manufacturing of gas equipment. He identified a promising business opportunity in the national gasification project that was just beginning in Serbia (then Yugoslavia). Drawing on his extensive experience gained in Canada and Serbia between 1984 and 1990, he decided to guide the company toward the development of new gas and oil products, with the goal of establishing Energo-Sistem’s own know-how in the field. He began assembling a team and hiring professionals from both mechanical and electrical engineering disciplines. Collaboration was established with the Faculties of Mechanical Engineering in Belgrade and Novi Sad to support talent acquisition and training. Energo-Sistem subsequently began producing gas equipment, including safety valves and ball valves.

Gasification was a new and highly attractive initiative, and young engineers were eager to be a part of it. Most employees were recruited based on recommendations from university professors. In 1991, mechanical engineer Miroljub Sadžaković reached out to Svetomir Milinković with strong references and was subsequently hired as Technical Director, receiving a 17.8% ownership stake. A large number of mechanical and electrical engineers and technicians were employed, and a dedicated team was assembled to build technical know-how, led by Svetomir Milinković with Miroljub Sadžaković as his deputy.

• 1992.-2002. – Within Energo-Sistem, departments were established for design, development and construction, equipment production, installation, and the creation of metering and regulation stations. At the same time, turn-key projects were carried out on-site. With the successful implementation of this program, the need for imported gas equipment was eliminated, as Energo-Sistem’s products came to meet both domestic and international standards.

Great effort was invested in developing Energo-Sistem’s unique know-how in the production of gas equipment, MRS (measuring and regulation stations), MMRS (main metering and regulation stations), gas devices, as well as in testing, servicing, and maintenance.
A ten-year collaboration was established with the Faculty of Mechanical Engineering in Novi Sad for staff training, technical consultations, and resolving ongoing engineering challenges.

Building Energo-Sistem’s know-how required years of dedicated work, knowledge, and experience—knowing which products to develop, how to design components and assemblies, understanding manufacturing technologies, assembling and testing procedures, commissioning, monitoring field performance, and much more.

This dedicated effort and a decade of continuous investment ultimately led to significant success: the development, production, and sale of hundreds of different products—primarily regulators, safety and shut-off valves, ball valves, filters, heat exchangers, as well as MRS and MMRS units.
In total, more than 100 distinct products and 500 design solutions were developed. All of this was thoroughly documented through technical catalogs, detailed design documentation, and a comprehensive reference list of completed projects –  Delivery of Gas stations and gasification jobs.

The first clients included NIS GAS, NIS ENERGOGAS, and various factories involved in gasification. Energo-Sistem was the first and only manufacturer of gas equipment in the former Yugoslavia and the Balkans to offer such a wide and comprehensive product range.

• 2002. Energo-Sistem relocated its headquarters to Novi Sad.
• 2007. – Mladen Milinković became co-owner, acquiring a 50% ownership stake.
• Today – Energo-Sistem operates from two production halls with a combined area exceeding 3,000 m², fully equipped to manage the entire production process. Since its founding, the company has developed and launched over 130 in-house designed products, primarily in the field of gasification equipment. Its activities encompass both individual product manufacturing and the delivery of complete solutions for gasifying residential areas and industrial facilities.

Over decades of dedicated work, Energo-Sistem has built a strong and distinctive know-how, reflected in its ability to provide reliable and technically optimized solutions tailored to specific client requirements. This technical expertise is carefully maintained, passed on, and continuously enhanced by a stable team of engineers, technicians, and operational staff, ensuring high quality and consistency at every stage of each project.

Thanks to this solid foundation, Energo-Sistem holds a significant position in the domestic gas technology market and is well positioned for expansion toward regional partners and more complex infrastructure projects.