Senior Firewall Engineer - 99.9% SLA & On-Call

U3 INFOTECH PTE. LTD.; Singapore; On-site; SGD 84,000 - 132,000; Full time

Job summary

U3 INFOTECH PTE. LTD. is seeking a Firewall Support Engineer to handle day‑to‑day administration, monitoring, and troubleshooting of the firewall infrastructure. You will manage changes, diagnose issues, and ensure a 99.9% SLA for mission‑critical systems.

The role requires 3–5 years in network security with hands‑on firewall experience and willingness to be on‑site and on‑call to support IT and L3 teams.

Qualifications

• 3–5 years in network security with L2 support experience.
• Experience supporting mission‑critical systems with 99.9% SLA.
• Hands‑on firewall administration on at least one major platform.

Responsibilities

• Configure, administer, troubleshoot, and maintain firewalls (Palo Alto, FortiGate, Check Point) and IDS/IPS.
• Manage firewall rule and policy changes under change control; perform reviews.
• Raise and manage Change Requests for firewall changes and risk assessment.
• Diagnose connectivity issues (NAT, routing, VPN, HA failover) using logs and captures.
• Patch firewalls in production and perform major firmware upgrades with minimal downtime.
• Develop, maintain, and enforce firewall policies and runbooks.
• Prepare firewall incident, audit, and system status reports.
• Join 24/7 on-call rotation for critical incidents; on-site when required.

Skills

TCP/IP

Routing

VPN

NAT

Network security

Education

Bachelor's degree in Information Security, Computer Science, or related field

Tools

Palo Alto

FortiGate

Check Point

Job description

U3 INFOTECH PTE. LTD. is seeking a Firewall Support Engineer to handle day‑to‑day administration, monitoring, and troubleshooting of the firewall infrastructure. You will manage changes, diagnose issues, and ensure a 99.9% SLA for mission‑critical systems.

The role requires 3–5 years in network security with hands‑on firewall experience and willingness to be on‑site and on‑call to support IT and L3 teams.