Network Security Engineer (DSC/JH) - Ang Mo Kio

• Firewall Monitoring & Support: Monitor the health and performance of network firewalls and security appliances, ensuring uptime, throughput, and compliance with security policies.
• Troubleshooting & Issue Resolution: Diagnose and resolve firewall-related issues including access control, VPN connectivity, and intrusion attempts to minimize operational disruptions.
• Configuration & Maintenance: Perform routine updates, rule base reviews, firmware upgrades, and configuration backups to maintain optimal firewall performance and security.
• Incident Management: Respond to security incidents involving firewall breaches or anomalies, escalate as needed, and ensure resolution within defined SLAs.
• Documentation: Maintain detailed logs of firewall changes, incidents, and maintenance activities. Document standard operating procedures and troubleshooting guides.
• Collaboration: Work closely with network, security, and IT teams to implement firewall policies, support new deployments, and resolve complex network security issues.
• Security Management: Enforce network segmentation, access control policies, and threat prevention measures through firewall configurations.
• Disaster Recovery & Redundancy: Ensure firewall configurations are backed up and tested for failover and recovery scenarios.
• Asset Management: Track firewall hardware and software inventory, licensing, and lifecycle status.
• Audit Support: Assist with internal and external audits, including ISMS 27001, by providing firewall logs, configurations, and compliance documentation.
• Vendor Support: Act as the point of contact with firewall vendors (e.g., Palo Alto, Fortinet, Cisco) for support tickets, patching, and after-hours maintenance.

• Proven experience (typically 2+ years) in network security or firewall administration roles.
• Strong knowledge of firewall platforms (e.g., Palo Alto, Fortinet, Cisco ASA/Firepower), network protocols, and security best practices.
• Experience with VPNs, NAT, ACLs, IDS/IPS, and logging/monitoring tools.
• Familiarity with Windows and Linux systems from a network security perspective.
• Excellent problem-solving skills and ability to work under pressure.
• Strong communication skills and ability to collaborate with cross-functional teams.
• Ability to work independently and manage time effectively to meet deadlines and SLAs.
• Strong attention to detail, organizational skills, and a proactive attitude.
• May require standby and occasional after-hours support depending on operational needs.

• Cisco CCNP Security
• Experience with scripting or automation tools (e.g., Python, Ansible) for firewall management.
• Prior experience in managing enterprise-level network security infrastructure.
• Knowledge of ITIL frameworks and best practices for IT service management.
• ISMS 27001 audit knowledge.
• Familiarity with cloud security and firewalls (e.g., AWS Security Groups, Azure NSGs).
• Experience with SIEM tools and log analysis.

Work location: Ang Mo Kio