The Serbian subsidiary of RTE international, RTEi South-East Europe, achieves ISO 27001 certification
Paris, October 2026. RTE international is pleased to announce that its Serbian subsidiary, RTEi South-East Europe (RTEi SEE), has been awarded ISO 27001 certification, the leading international standard for information security. A gateway to the Balkans, the subsidiary carries out software development, grid and market studies, training and consulting activities. It is the first RTE Group subsidiary to obtain this certification.
Security as a process of continuous improvement
The ISO 27001 certification, granted following an audit carried out by Intercert at RTEi SEE in September 2026, complements RTE international’s existing ISO 9001 and ISO 45001 certifications. It forms part of the company’s broader commitment to quality and safety. Although the Serbian subsidiary has only recently broadened the scope of its activities, its long-established digital foundations made it the ideal candidate for embarking on a continuous improvement approach to information security.
ISO 27001: the culmination of a project spanning more than eighteen months
The certification recognises the maturity of RTEi SEE’s security approach and confirms that an information security management system (ISMS) compliant with the standard has been put in place. It marks the culmination of more than eighteen months’ work by the French and Serbian teams. Together, they designed and rolled out every component of the ISMS, and demonstrated in practical terms that they have information security risks firmly under control. Neither the preliminary internal audit nor the certification audit identified any non-conformities.
Safeguarding the data of critical infrastructure
Working under the ISO 27001 banner meets the expectations of RTEi SEE’s clients, in particular transmission system operators, who entrust the subsidiary with sensitive information. The certification provides an additional guarantee of rigour at a time when cybersecurity requirements for suppliers and partners are tightening, notably with the European NIS2 (Network and Information Security 2) Directive.
“The sensitivity of the data our clients entrust to us, in a sector that touches on critical infrastructure, demands constant rigour on our part. Safeguarding information security must guide every one of our projects. Since 2023, RTE international has been committed to demonstrating its high standards in quality and safety; ISO 27001 certification is part of that momentum and rewards the groundwork laid by our teams,” said Veronika Milewski, CEO of RTE international.
