3
Certificate of competency in the design works that impact the safety of capital facilities
4
Licence to perform works that involve access to classified information and state secrets
5
Performance bank guarantee from the largest banks
6
Right to carry out energy survey activities
7
In 2015, ten Ostec Group companies confirmed their conformance to the international standard when recertifying QMS according to ISO 9001:2008. It indicates the international quality standards of services provided by Ostec. Annual monitoring shows customer satisfaction at 4.78 on a five-point scale