Purpose of the role The Senior Network Security Engineer is responsible for supporting the design, configuration, monitoring and maintenance of network security hardware, systems, and software; including preparing any documentation for future reference and ensuring communication regarding network security and other issues is provided timely. AccountabilitiesWorking in partnership with IAG Tech and the business to: Be the lead security technical role in resolving complex network security device incidents, applying diagnosis, maintenance, change and configuration control attributes to bring about a resolution.Consistently perform and deliver outputs within the service contract time constraints (KPI’s & OLAs/SLA’s).Analyse traffic behaviours, identify and resolve any congestion or traffic issues related to network security hardware or protocols.Develop and implement detailed logical designs in areas of – Firewalls, Load balancers, Layer 3 VPN, Layer 2 VPN.Monitor network performance to determine whether adjustments need to be made, and to determine where changes will need to be made in the future.Operations Management: Ensure all escalated requests are handled in line within the agreed service levels and are handled efficiently and effectively. Ensure customer communication is managed effectively and in line with customer expectation and any specific contractual SLA/OLA agreements. Perform network security administration activities to ensure the smooth operation of services across multiple platforms. Diagnose and support with recovery activities for P1 and P2 incidents to enable services to operate.Stakeholder Management: Effectively manage and coordinate internal and external relationships to meet expectations on change deployment timelines and processes. Contribute to the planning of network infrastructure software releases and schedule configuration changes accordingly to avoid network downtime for customers.    
