Operational Technology Cyber Engineer

Key Responsibilities 🔧 OT Security Design & Implementation • Develop and implement cybersecurity measures across operational technology environments within power generation and water treatment facilities. • Design and maintain OT network architecture, ensuring proper segmentation between IT and OT environments (including Purdue Model Levels 0–3.5). • Harden ICS assets such as HMIs, PLCs, RTUs, DCS, SCADA systems, and engineering workstations. • Ensure secure IT/OT integration and apply regular patching or compensating controls to OT assets. 📋 Risk Assessment & Compliance • Conduct risk assessments and ensure compliance with NIST CSF, ISO 27001:2022, and Singapore's CII regulations (CCoP by CSA, WSCP by PUB). • Support alignment with Company's Group Cybersecurity Framework (based on NIST CSF) • Ensure compliance with IEC 62443 / ISA 99 standards for industrial automation and control system security. [ • Support audits and regulatory reviews (including CSA and PUB assessments) to maintain a robust cybersecurity posture across critical infrastructure. 🔍 Monitoring & Incident Response • Monitor OT systems for anomalies using cybersecurity tools (e.g., SIEM, Claroty, Nozomi). • Lead incident response efforts for OT cyber incidents, coordinating with O&M teams, IT/OT cybersecurity teams, and external incident response partners (e.g., Black Panda, EY). • Ensure all alerts are managed in a standardised, well-defined, and efficient manner in alignment with Company’s policy. • Execute first-responder actions and follow-up responses per Company's Cyber Security Incident Response Procedures for CII and non-CII OT sites. 📑 Documentation & Asset Management • Maintain accurate documentation of network topologies, asset inventories, and OT security configurations. • Ensure all ICS assets are properly catalogued, including SCADA, HMI, PLC, substations, inverters, RTUs, data loggers, firewalls, and anti-virus software across wind, solar, and power generation sites. 🏗️ Physica…