OT Networks, Edge & Remote Access

Network assessments start with current topology, device health, addressing practices and segmentation boundaries. The review covers switch utilisation, link resilience, spanning tree behaviour, time synchronisation and critical service dependencies. Assets are mapped into practical zones aligned to IEC 62443 concepts, with conduits and firewall policies that support production and maintenance operations. Typical technologies include managed industrial switches, redundant ring protocols and VLAN segmentation with documented recovery procedures. Sites that experience intermittent communication faults, unexplained controller dropouts or poor visibility of network ownership are where this work matters most. A clear baseline and future-state architecture is what allows reliability to improve while preparing for expansion, remote diagnostics and stronger cyber posture.

Control servers and virtual infrastructure need planned lifecycle management to avoid unplanned outages and unsupported systems. We design backup schedules, snapshot policies, patch windows and recovery tests for SCADA, historian and engineering servers. Where possible, redundancy and documented failover sequences allow operations to recover quickly from hardware faults or software corruption. Standards and guidance from IEC 62443 and NIST frameworks inform hardening and maintenance strategy. For sites running legacy operating systems or ad hoc backups that have never been tested under pressure, this is usually where modernisation starts. Clear runbooks, restoration drills and ownership matrices allow site teams to respond confidently during incidents.