Network/Firewall Engineer

Your tasks

We are seeking a Network/Firewall Engineer to manage network and firewall administration, patching, firmware upgrades and vulnerability remediation. The role involves maintaining network infrastructure security, troubleshooting patch-related issues and supporting infrastructure operations in accordance with operational and service-level requirements.

• Administer and maintain network and firewall environments, including Cisco, Fortinet, F5 and other relevant network security platforms.
• Perform patch management and vulnerability remediation for network and firewall devices.
• Troubleshoot issues arising from patching, firmware upgrades and infrastructure maintenance.
• Conduct patch assessments and recommend, plan and coordinate deployment activities.
• Perform VMware ESXi patching and support BIOS and firmware upgrades.
• Use patch management tools, such as NetBot or equivalent tools, to support patch deployment and monitoring.
• Automate pre- and post-patching tasks where applicable.
• Manage Cisco platforms, including IOS and IOS-XE.
• Analyse network flows and troubleshoot connectivity issues.
• Administer and support DNS, DHCP and IP Address Management (IPAM).
• Maintain switching and routing environments, including VLANs, link aggregation, Ethernet, Spanning Tree Protocol (STP), BGP, OSPF and EIGRP.
• Configure and maintain standard and extended access control lists (ACLs).
• Monitor logs and perform routine maintenance to support network availability, security and performance.

Requirements

• 8 years of relevant experience in network and firewall administration.
• Practical experience in patch management, vulnerability management and troubleshooting patch- or firmware-related issues.
• Experience with Cisco, Fortinet, F5 and relevant network infrastructure technologies.
• Knowledge of network security technologies, including Cisco ACI, Arista, Check Point and Palo Alto Networks, where applicable to the operating environment.
• Experience in VMware ESXi patching, BIOS and firmware upgrades, and patch management tools.
• Strong understanding of network flows, DNS, DHCP, IPAM, switching, routing and access control lists.
• Experience working in an SLA-driven environment.
• Willingness and availability to support scheduled weekend duties on a roster basis and weekday on-call support when required.

How to apply

If you believe you fit the requirements for the role, please submit your application below or drop us an email directly quoting the job title. Due to an anticipated high volume of applicants, we regret that only shortlisted candidates will be notified. The information provided is for recruitment purposes only. Cornerstone Global Partners (EA License Number: 19C9859) is an affirmative equal-opportunity employer and recruitment firm. We evaluate qualified applicants without regard to race, colour, religion, creed, gender, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. (Scarlett) Zhang Jifan Scarlett.Zhang@cornerstoneglobalpartners.com EA Registration Number: R26159541. Cornerstone Global Partners Pte Ltd (EA License: 19C9859)