Senior IT Infrastructure Engineer

ANTINA PTE. LTD.; Singapore; On-site; SGD 120,000 - 160,000; Full time

Job summary

ANTINA PTE. LTD. in Singapore seeks an experienced IT infrastructure engineer with 8+ years in design, deployment, and support of on-premises and cloud-integrated networks. You will manage security, virtualization, and storage components across complex environments.

The role requires hands-on Palo Alto firewall skills, VPN/NAT troubleshooting, and strong RCA abilities, plus experience with Zabbix, Grafana, PRTG, Nagios, and Microsoft 365. On-site work in Singapore offered.

Qualifications

• Degree in IT, Computer Science, or related field.
• 8+ years of experience in IT infrastructure and/or network engineering.
• Hands-on Palo Alto firewalls experience and VPN/NAT troubleshooting.
• Experience across networking, systems, enterprise technologies, and monitoring.

Responsibilities

• Design, implement, and support end-to-end on-premises IT infrastructure.
• Operate enterprise network infrastructure (VPN, NAC, load balancers, firewall).
• Deploy, configure, and support Windows Server, Linux, virtualization, and storage.
• Support Microsoft 365 and hybrid identity environments.
• Perform RCA and security hardening, patching, and vulnerability management.
• Manage monitoring platforms and optimize alerts (Zabbix, Grafana, PRTG, Nagios).
• Support ITSM processes and on-call operations.
• Maintain asset inventory and technical documentation; manage vendors and SLAs.

Skills

Palo Alto firewalls

Root cause analysis

Stakeholder management

Communication skills

Education

Degree in IT or Computer Science

Tools

Zabbix

Grafana

PRTG

Nagios

Veeam

ITSM tools

Job description

Job Duties:

• Design, implement, and support end-to-end on-premises IT infrastructure (network, systems, and cloud environments)
• Implement, operate, and troubleshoot enterprise network infrastructure (routing, switching, firewalls, VPN, NAC, load balancers, wired/wireless networks).
• Deploy, configure, and support Windows Server, Linux, VMware/Hyper‑V, and storage systems.
• Support Microsoft 365 and hybrid identity environments (Entra ID, Intune, Exchange, Teams).
• Perform troubleshooting and root cause analysis (RCA) for complex infrastructure issues.
• Implement security controls including segmentation, hardening, patching, and vulnerability management.
• Manage monitoring platforms (Zabbix, Grafana, PRTG, Nagios) including performance tuning and alert optimisation.
• Support ITSM processes (incident, problem, change) and participate in on-call operations
• Maintain IT asset inventory, lifecycle management, and technical documentation standards
• Manage vendors, SLAs, and infrastructure‑related projects
• Provide L1/L2 support for end‑user computing (Windows workstations and enterprise applications).

Job Requirements:

• Degree in IT, Computer Science, or related field.
• 8+ years of experience in IT infrastructure and/or network engineering.
• Strong hands‑on experience with Palo Alto firewalls (policy management, VPN, NAT, troubleshooting) is required.
• Strong hands‑on experience in the following areas: Networking: routing, switching, firewalls, VPN, VLAN, NAC / Systems: Windows Server, Linux, VMware / Hyper‑V / Enterprise technologies: Cisco, Aruba, Fortinet, F5, Microsoft 365, SIEM, PAM / Monitoring & operations: Zabbix, Grafana, PRTG, Nagios, ITSM tools, backup solutions (e.g. Veeam)
• Strong troubleshooting skills with ability to perform root cause analysis (RCA).
• Experience in system hardening, patch management, and security operations.
• Good communication and stakeholder management skills.
• Experience in regulated environments (finance, telecom, technology) is an advantage.