Network Engineer

1 day ago

Singapore HENDERSON SECURITY SERVICES PTE. LTD. Full time

Key Responsibilities Design, deploy, and manage end-to-end security architectures, including network perimeter defenses, segmentation, intrusion prevention systems, and zero-trust access frameworks. Lead implementation and operationalization of Security Management Solutions, such as SIEM, NAC, Vulnerability Management Systems, and Network Access Controls. Manage and maintain secure configurations for routers, switches, firewalls, and network devices using Network Management Systems (NMS) and centralized policy enforcement. Perform real-time security monitoring, event correlation, and incident response, coordinating with the Security Operations Center (SOC) when required. Troubleshoot and resolve security-related issues in live network environments, including threat containment, malware isolation, and root cause analysis. Apply deep knowledge of security protocols and network-layer defense mechanisms, including IPSec, VPN, AAA, ACLs, and network segmentation techniques. Fulfill and track security service requests (e.g., access control changes, firewall rules, DNS security settings, IP whitelisting/blacklisting) through formal Change Management processes aligned with ITIL. Develop, update, and maintain security documentation, including network security diagrams, configuration baselines, risk registers, runbooks, and incident response plans. Manage patch management lifecycle for network infrastructure: assess vulnerabilities, prioritize, test, and deploy security patches and firmware updates in a controlled manner. Coordinate with vendors to address published security advisories, CVEs, and ensure timely mitigation across all impacted systems. Conduct security assessments, risk reviews, and internal audits to ensure compliance with ISO 27001, NIST, GDPR, or other regulatory frameworks. Work collaboratively with the IT, DevOps, and Cloud teams to implement secure networking practices across on-premises and cloud environments. Automate security tasks using scripting (Python, Bash, PowerShell) or configuration management tools (Ansible, Puppet, etc.) for scalable defense mechanisms. Perform other related tasks as assigned by the Institute or Security Leadership. Required Qualifications and Experience Bachelor's degree in Information Security, Computer Science, Information Technology, or related discipline. Minimum 5–8 years of relevant experience in network security engineering, security infrastructure management, or security operations roles. Strong technical knowledge in: Network Security Protocols: IPSec, SSL/TLS, 802.1X, DNSSEC Firewalls (e.g., Palo Alto, Fortinet, Cisco ASA), IDS/IPS, UTM Authentication/Authorization: RADIUS, TACACS+, MFA Routing and Switching Security: OSPF/BGP hardening, Layer 2 protections Experience managing enterprise-grade NMS/SIEM platforms (e.g., Splunk, QRadar, ArcSight, SolarWinds, Elastic SIEM). Strong background in vulnerability assessment, patch lifecycle management, and configuration hardening. #J-18808-Ljbffr

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