OT / ICS & Critical Infrastructure Security

Operational technology and industrial control systems increasingly connect to corporate networks and the internet, widening the attack surface for environments that were never designed to be exposed. Nexagate helps organisations understand and reduce the risk to their OT, ICS and SCADA systems while keeping production and safety systems running.

OT environments cannot be tested like conventional IT. We begin with passive asset discovery and an architecture review to build an accurate inventory of controllers, sensors and connected devices, then assess segmentation and attack paths against a defence-in-depth model such as the Purdue reference architecture. We review the isolation of safety-critical systems, the security of protocols and remote access, and the configuration of connected devices, using operationally safe techniques chosen to avoid disrupting live operations. Findings are risk-rated with practical, prioritised mitigation guidance appropriate to industrial environments.