System EngineerLocation: East London (Hybrid office/home) Rate: £450 £500 per day (Inside IR35) Duration: Initial 3 4 month contract (backlog clearance) with strong potential for extension or permanent conversion Client Environment: Major London Rail customers (TfL, Network Rail station systems) OverviewWe are seeking a mid-to-senior Cybersecurity and Network Assurance Engineer to join a high-performing networks team supporting critical rail infrastructure in London.This role will focus on cybersecurity governance, assurance, and technical documentation, ensuring networked systems meet customer, regulatory, and industry standards. You will play a key role in clearing an immediate backlog of assurance deliverables while providing technical oversight to junior engineers and supporting SIEM integration activities.This is a hybrid East London role with no trackside/site access required. Key ResponsibilitiesCybersecurity Governance and Assurance Produce and maintain: Cyber Security Management Plans (CSMP)Risk assessments and threat modelsAssurance and compliance documentationControl framework mappings Align artefacts to client standards (TfL / Network Rail) and industry frameworksSupport continual improvement of cyber assurance processes Standards and Compliance Map controls and documentation to: ISO/IEC 27001IEC 62443 (OT security)Customer-specific rail standards Ensure deliverables meet governance and audit requirements Network Security and Architecture Assurance Provide design ..... full job details .....