Industrial IT Security
OT security for production and critical infrastructure
A halt in production is often far more expensive than a breach of the office network. We secure your OT environment — SCADA, PLCs, ICS and industrial networks — without compromising uptime or operations.
What is OT security?
OT isn't just IT with a different cable colour
OT (Operational Technology) is the systems that control your physical production: PLCs, SCADA, HMIs, sensors and industrial networks. They're often old, rarely patched and designed to be reliable — not secure.
When IT and OT converge (Industry 4.0, remote access, cloud monitoring), the same attack techniques from the office network suddenly become a risk to production. A ransomware attack that shuts down a factory typically costs six to seven figures per day — and NIS2 now legally requires you to protect it.
Threat landscape
What we protect your OT environment against
OT attacks look like IT attacks on the surface, but the consequences are different — production stoppage, physical damage and supplier failures.
Ransomware against production
Encrypts engineering workstations and HMIs — the factory stops. We segment and harden so that a breach on the office network can't spread to production.
Legacy systems without patches
Windows XP, Server 2003 and PLC firmware that's never updated. We build compensating controls and virtual patching without touching vulnerable devices.
Flat networks without segmentation
Entire factory on the same VLAN. One compromised coffee machine reaches the PLC. We segment per the Purdue model and document the data flow.
Insecure remote access to SCADA
Open VPNs, vendors with permanent accounts, RDP straight to HMIs. We build jump hosts, MFA and just-in-time access.
Supply chain attacks
Compromised vendor software or updates (SolarWinds-style). We validate software bills of material and monitor vendor traffic.
Insider and USB-based attacks
Stuxnet-style USB spread and unintentional mistakes from technicians. We introduce USB control, asset whitelisting and logging on every engineering workstation.
Our approach
From blind spot to control — without stopping production
OT security can't be rolled out over a weekend. We work in three phases: first we understand the environment (passive asset discovery — no scanning that could topple old PLCs), then we design and segment with your OT team, and finally we set up continuous monitoring.
We don't touch critical systems without testing in a lab or speaking to your machine vendor first. Operations and safety always come before security measures — even when deadlines are pressing.
Services
Our OT security services
We cover the entire lifecycle — from the first risk assessment to 24/7 monitoring and NIS2 reporting.
OT risk assessment
Passive mapping of assets, data flows and vulnerabilities. Delivered with a prioritised roadmap and budget estimate — typically 3–5 weeks of work.
IT/OT network segmentation
Design and implementation per the Purdue model. Firewalls, VLANs and data diodes where it makes sense — tested before going into production.
Asset discovery & inventory
Complete, maintained overview of every PLC, HMI, switch and sensor. Foundation for security, NIS2 documentation and operational optimisation.
Secure remote access
Centralised jump host with MFA, session recording and just-in-time access for vendors. Replaces ad-hoc VPNs and shared accounts.
24/7 OT monitoring
Dedicated OT-aware monitoring that recognises industrial protocols (Modbus, DNP3, OPC UA) and alerts on unusual behaviour.
NIS2 compliance for production
Risk analysis, incident reporting, supplier management and board approval. We deliver the documentation regulators will ask for.
NIS2 and critical infrastructure
NIS2 hits far more manufacturers than you'd think
NIS2 covers companies in energy, food, transport, water, pharma, chemicals and manufacturing — including as a supplier to other covered companies. Fines can reach 2% of global revenue, and the board is personally liable.
We help you determine whether you're covered, close the gaps in your OT security and document compliance — before the regulator (Centre for Cyber Security) comes knocking.
Frequently asked questions about OT security
Microsoft Solutions Partner
Experience from industry, utilities and life science
We've been securing OT environments for Danish manufacturers since 2010 — from smaller factories to critical infrastructure. Book a no-obligation OT assessment and get a concrete roadmap.
Ready to secure your production?
We offer a free 30-minute conversation where we determine whether you're covered by NIS2 and where your biggest OT risks likely sit.