IT Network & Security Administrator

Responsibilities

• Network Infrastructure & Operations
• Manage, maintain and troubleshoot LAN, WAN, VPN, firewall and network infrastructure across HQ and retail stores.
• Support L2/L3 network troubleshooting, including routing, switching, VLAN, inter-VLAN routing, trunking, STP, ACL, NAT and VPN-related issues.
• Administer and support core, distribution and access switches, including configuration, troubleshooting, firmware upgrades and documentation.
• Support multi-site connectivity, store network setup, network changes and infrastructure deployment.
• Monitor network performance, uptime and availability across HQ and retail outlets.
• Support network device upgrades, replacement, migration, cabling coordination, testing and commissioning.
• Maintain updated network diagrams, IP addressing, device inventory, configuration records and SOP documentation.
• Firewall & Network Security
• Manage firewall policies, VPN access, NAT rules, rule review, firmware upgrades, backup and security configuration.
• Support firewall troubleshooting and coordination with vendors or service providers.
• Implement and maintain network segmentation and access controls to improve security posture.
• Support vulnerability remediation, patching and infrastructure hardening activities.
• Assist in security audits, compliance reviews, VAPT remediation and security documentation when required.
• Telco, Vendor & Project Support
• Coordinate with telcos and vendors on circuits, SIMs, provisioning, escalation and issue resolution.
• Work with internal stakeholders, vendors and service providers for network projects, incidents and changes.
• Provide on-site support at retail stores when required for troubleshooting, deployment or incident resolution.
• Participate in infrastructure projects, new store setup and network/security improvement initiatives.
• Handle ad-hoc IT infrastructure and operational support where required.

Requirements

• Minimum 5 years of hands-on experience in network infrastructure and network security support.
• Strong knowledge of L2/L3 networking, routing, switching, VLAN, VPN, firewall, LAN/WAN and network troubleshooting.
• Good understanding of core, distribution and access switch architecture.
• Hands-on experience with network devices such as Cisco, Aruba, HPE, Fortinet, Palo Alto, Sophos or equivalent.
• Experience supporting firewalls, VPN, ACL, NAT, network segmentation and security policies.
• Experience supporting multi-site environments, preferably retail, hospitality, healthcare, manufacturing or enterprise environments.
• Able to troubleshoot network incidents independently and explain technical issues clearly.
• Experience working with vendors, telcos and service providers for escalation and issue resolution.
• Comfortable working on-site in Singapore and travelling to retail stores when required.
• Strong ownership mindset, good documentation discipline and ability to work independently.
• Preferred Skills
• Experience with Fortinet / FortiGate firewall and SD-WAN.
• Knowledge of Azure networking or Azure Firewall.
• Exposure to VAPT remediation, security audit, Cyber Trust Mark or Data Protection Trust Mark will be an added advantage.
• Certifications such as CCNA, CCNP, Network+, Security+, Fortinet NSE or equivalent will be advantageous.
• Ability to communicate in Mandarin will be an added advantage for coordination with regional stakeholders, vendors or retail users.
• Ideal Candidate Profile

Additional Information

Job Title: IT Network & Security Administrator Location: Changi Business Park, Singapore | On-site Employment Type: 12-Month Renewable Contract We are looking for a hands-on IT Network & Security Administrator to manage and support network infrastructure and security operations across HQ and retail store environments. The ideal candidate should have strong hands-on experience in L3 network troubleshooting, routing, switching, firewall administration, VPN, VLAN, core/distribution/access switch architecture , and multi-site network support. This role requires someone who can independently troubleshoot network issues, support infrastructure rollout, manage vendors, and ensure reliable connectivity across business and retail operations.

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