Cybersecurity for energy and industrial technology

The threat landscape

Energy installations are a favoured target because their disruption has maximum effect. Attackers seek the way in through weakly secured remote-maintenance access, through the link between office and control networks, or through outdated telecontrol technology. Growing decentralisation — many small generating units instead of a few large power stations — enlarges the attack surface: every solar farm, every substation, every inverter is a potential entry point, and many of these distributed installations are only rudimentarily monitored.

Typical environments

• Solar and photovoltaic farms with inverters, data loggers and remote monitoring
• Hydropower stations with long-lived, hard-to-update control technology
• Substations and grid components with telecontrol and protection systems
• Distributed control and monitoring systems (SCADA) across multiple sites

The regulatory frame

Energy is one of the core sectors of NIS2; operators are generally classified as essential entities and therefore face the strictest supervision. Documented risk management, working reporting processes and robust evidence are mandatory — with accountability resting on management. IEC 62443 provides the technical framework for it.

What we deliver

We cover the whole chain: NIS2 scoping, an IEC 62443 assessment at the plant, network segmentation to separate IT and control, analysis of firewall logs, and ongoing support as a vCISO. Where wanted, we also support the firewall logging of distributed installations and continuous monitoring.

Demonstrable experience

Our experience in the energy sector is not a promise but evidence: eleven OT audits carried out, including solar and hydropower installations. We know the reality of distributed generation — long distances between sites, scarce maintenance windows, technology of several generations in close quarters. That familiarity with practice is at the same time the proof that our method holds up in demanding industrial environments.

Decentralised generation as a particular challenge

The energy transition changes the attack surface fundamentally. In place of a few large power stations come thousands of small, distributed generating units — solar farms, wind installations, battery storage — monitored and controlled remotely over public networks. Each of these units is a potential access point, and many come from different manufacturers with differing security levels. The challenge is therefore no longer only the protection of one central installation, but the securing of a widely distributed, heterogeneous system.

Remote maintenance as the main way in

Distributed installations can only be run economically with remote access — and that remote access is the most common way in. Access by manufacturers and service providers is often left permanently open, weakly authenticated and unlogged. Securing remote maintenance is therefore almost always one of the most effective single measures we recommend.

What an assessment covers in concrete terms

For energy operators the work begins with a complete inventory of the distributed installations and their communication paths. Then follow the assessment of network segmentation, the review of remote access and protection systems, and the analysis of existing logs. We classify the findings along IEC 62443 and translate them into a prioritised action plan that takes account of scarce maintenance windows and long travel distances.

After the audit — continuous support

Security does not end with the report. With distributed installations in particular, ongoing observation is decisive: on request we support the analysis of firewall logs, continuous monitoring, and the role of a virtual CISO who accompanies implementation over time and reports to the authorities.

Old technology, new requirements

Many energy installations run on control technology built long before today's security requirements. These systems often cannot be updated and are nonetheless meant to run reliably for decades. The right approach is not hasty replacement but protection through environment: segmentation, controlled access and monitoring shield vulnerable legacy systems without endangering operations. This balance between protection and operational safety is the core of our work in the energy sector.

Interplay with regulation

Energy operators rarely face NIS2 alone. Depending on country and role, sector-specific requirements, grid-operator rules and technical minimum standards come on top. We order these requirements along one common technical framework — IEC 62443 — so that you need not set up a separate project for every rule, but build once cleanly and demonstrate many times. That saves effort and keeps your evidence consistent over time.

Experience that transfers

The same method we proved across eleven OT audits in the energy sector we apply today in manufacturing too. For you this means working with a partner who knows the particularities of distributed generation from practice and at the same time brings a view beyond a single sector. This combination of depth in energy and a cross-sector method is rare — and for operators who want more than a tick on a checklist, the decisive difference.

First steps

A good start is a compact inventory of your distributed installations and their remote access. From it emerges quickly where the greatest risk lies and which measure brings the most protection per unit of effort.

Further reading: OT Security Assessment · IEC 62443 – Assessment & Security Architecture · NIS2 & ISO/IEC 27001