Industrial Cyber Security for Power

European Union NIS Directive Compliance


SIS’ bespoke approach towards the assessment of critical infrastructure enabled a UK power company to determine compliance to the EU NIS Directive, and to develop an improvement plan towards strengthening resilience to cyber threats.


An electrical power generation company in the United Kingdom (UK), supplying a key proportion of the country’s energy needs, required specialised industrial cyber security advisory towards the assessment of critical networks and information systems (NIS), as part of obligations under the European Union’s NIS Directive. The Directive is the first EU-wide piece of legislation on cyber security and applies to sectors which are vital for the economy and society, providing services such as the supply of electricity, oil, gas and water and the provision of healthcare and transport – otherwise known as Operators of Essential Services (OES).

In accordance with the regulation, as an OES, SIS’ Client must take appropriate and proportionate security measures to manage risks to NIS. Cyber security risks must also be managed and actively monitored to ensure a resilient energy system, now and in the future.

To strengthen their cyber security posture and avoid penalties for the failure to adhere to the Directive, SIS’ Client required a self-assessment of security maturity and assistance with identifying security enhancement initiatives to ensure the company was resilient from the threat of cyber attack.


To increase the OES’ overall cyber security maturity and cyber resilience, SIS partnered and collaborated with the energy provider to identify critical NIS assets, and assess compliance to the Directive. SIS could then identify and implement an improvement plan to ultimately provide assurance that risks are being identified and managed appropriately and reasonably.

The establishment, maintenance and continual improvement of a robust Cyber Security Management System (CSMS) is fundamental in ensuring compliance with NIS requirements and OES’ ability to appropriately manage cyber security risks, in a pragmatically and systematically. The CSMS aligns with other internal management systems already established within the OES such as ISO 9001, and the supporting security architecture facilitates a fit for purpose cyber security controls implementation, to mitigate risk and provide resilience to cyber attack.

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