Network/Firewall Engineer

Exasoft Pte. Ltd.; Singapore; On-site; SGD 120,000 - 160,000; Full time

Job summary

Exasoft Pte. Ltd. in Singapore seeks an experienced network engineer to administer and maintain enterprise firewall and network environments.

You will oversee patching, firmware upgrades, vulnerability remediation, and log monitoring while ensuring adherence to change management procedures. The role requires hands-on expertise with Cisco/Fortinet/F5/Check Point/Palo Alto devices, experience with routing, switching, DNS/DHCP/IPAM, and a strong focus on security and reliability in an SLA-driven

Qualifications

• 8–10 years of experience in Network and Firewall Administration.

Responsibilities

• Administer and maintain network and firewall environments, including Cisco, Fortinet, F5, Check Point, and Palo Alto.

Skills

Network security

Patch management

Troubleshooting

DNS/DHCP/IPAM

Routing & Switching

Log monitoring

Change management

On-call support

Tools

Cisco

Fortinet

F5

Check Point

Palo Alto

NetBot

Job description

Responsibilities

• Administer and maintain network and firewall environments, including Cisco, Fortinet, F5, Check Point, and Palo Alto.
• Manage network device patching, firmware upgrades, and vulnerability remediation.
• Perform patch assessments and recommend deployment plans based on security and operational requirements.
• Use patch management tools such as NetBot or equivalent tools to support patch deployment and tracking.
• Conduct pre-patching and post-patching checks and automate routine patching tasks.
• Troubleshoot patching, firmware upgrade, and network-related issues.
• Manage Cisco IOS/IOS-XE platforms and support network flow analysis.
• Configure and troubleshoot DNS, DHCP, IPAM, routing, and switching technologies.
• Manage VLANs, Ethernet, STP, link aggregation, routing protocols, and standard/extended access control lists (ACLs).
• Monitor network logs, device health, and patch compliance.
• Follow change management procedures and support SLA-driven operations, including weekend shifts and on-call support.

Requirements

• 8–10 years of experience in Network and Firewall Administration.
• Hands-on experience with Cisco, Fortinet, F5, Check Point, Palo Alto, or other enterprise network and firewall technologies.
• Strong experience in network device patching, firmware upgrades, and vulnerability management.
• Experience with Cisco IOS/IOS-XE and patch management tools such as NetBot or equivalent.
• Strong knowledge of network flows, DNS, DHCP, and IPAM.
• Experience with routing protocols such as BGP, OSPF, and EIGRP, and switching technologies such as VLANs, STP, and Ethernet.
• Knowledge of standard and extended ACLs and network security principles.
• Experience with patch assessment, pre-patching and post-patching validation, and automation.
• Strong troubleshooting and log monitoring skills.
• Experience working in an SLA-driven environment, with flexibility to work weekends and provide on-call support.
• Excellent verbal and written communication and interpersonal skills.