Senior Network Engineer (L3)

TECHEMERGE SOLUTIONS PTE. LTD.; Singapore; On-site; SGD 73,000 - 106,000; Full time

Job summary

TECHEMERGE SOLUTIONS PTE. LTD. is seeking a skilled Network Engineer to support customer premises deployments, overseeing routing/switching and security controls.

You will resolve complex issues, perform configurations, and coordinate with vendors for testing and maintenance, ensuring robust network performance at client sites. The role requires CCNP or equivalent, strong knowledge of Cisco ASAs, FortiGate, and firewall concepts, plus hands-on use of monitoring and diagnostic tools.

Qualifications

• Extensive hands-on experience with Cisco routers/switches across series.
• Strong working knowledge of Cisco IOS and NAC implementations.
• Experience with Aruba ClearPass and Cisco ISE deployments.
• Experience with wireless networks, APs and controllers.
• Solid understanding of OSI/TCP-IP models.
• Ability to provide Level-2 technical support and troubleshooting.
• Proficiency with network monitoring, diagnostics, and analytics tools.
• Familiar with firewall products (Cisco ASA, FortiGate, Palo Alto, Checkpoint)
• CCNP certification or equivalent credential is a plus.

Responsibilities

• Perform installation, configuration, and maintenance at customer premises.
• Handle problem resolution, escalation, and closure for routing/switching issues.
• Execute configuration changes as required.
• Provide problem status updates to the Service Desk and log in ticketing system.
• Conduct day-to-day network operations and performance monitoring at client sites.
• Coordinate testing and preventive maintenance with vendor teams.
• Plan OS upgrades and patching as needed.
• Ensure 24x5 onsite coverage and 24x7 standby for critical incidents.
• Produce proactive incident reports within 24 hours for network problems.
• Respond to fault calls via emails and other channels for firewall issues.
• Escalate issues to vendor support and ensure timely resolution.
• Provide multi-vendor equipment support across various models.
• Maintain certificates inventory and perform renewals when required.
• Enforce IBM security policies including hardening and health checks.
• Maintain client device inventory and ensure firmware up-to-date.
• Monitor End of Life/End of Support notices and advise client.

Skills

Cisco router/switch expert

Cisco IOS knowledge

NAC expertise

Aruba ClearPass/Cisco ISE

WLAN/AP/Controller troubleshooting

OSI/TCP-IP knowledge

Level-2 support

Network monitoring/diagnostics

CCNP certification

F5 load balancers

Tools

Packet Tracers

Job description

Required Key Skills

• Expert level knowledge in implementation and maintenance of Cisco Routers and Switches of all series.
• Good knowledge in Cisco IOS
• Good knowledge in implementation and operations support of NAC (Network Access Control)
• Good knowledge in Aruba Clear Pass / Cisco ISE
• Good knowledge in Wireless Network / Access Points / Controllers support and troubleshooting
• Expert level understanding of the OSI or TCP/IP model
• Provide Level-2 technical support and troubleshooting to resolve issues
• CCNP certification
• Hands-on experience with monitoring, network diagnostic, Packet Tracers and network analytics tools
• Good knowledge on Firewall Products like Cisco ASA, FortiGate, Palo Alto, Checkpoint
• Good knowledge on Aruba ClearPass/Cisco ISE, Cisco wireless controllers
• Knowledge on F5 load balancers

Priority Tasks

• Workplace is at customer premises and staff has to follow instituted Workplace securities
• Perform Problem resolution, escalation and/or closure of incident including problem analysis and identification of the source of the problem w.r.t Routing and Switching
• Perform configuration change activities
• Provide problem status to the Service Desk and/or update into the ticketing tool according to the Procedures Manual
• Perform day-to-day Network operation for the Network Infra-structure and Network Equipment at the customer premises, including performance monitoring, bandwidth monitoring.
• Work with customer's vendor to perform testing and preventative maintenance according to the schedule provided by the customer for the Network Equipment
• Perform periodic OS upgrade and Patching as and when required.
• 24X5 rotational shift onsite availability and 24X7 standby / remote support availability as and when needed for critical incidents.
• Perform Problem resolution, escalation and/or closure of incident including problem analysis and identification of the source of the problem
• Provide proactive incident reports for all Network related problems, faults, events within TWENTY-FOUR (24) hours
• Respond to all fault calls inclusive of emails and other forms of communications for Firewall related issues and problems reported
• Escalate the problem to Vendors Support in timely manner and get the issue resolved within the specified time as agreed with the customer
• Provide multi-vendor equipment support across a wide range of models and types of networking equipment
• Maintain the inventory of certificates and install/update/renew certificates as and when required.
• Perform security activities like hardening/periodic health check/ ID validation and other compliance activities as per IBM security policies and standards.
• Maintain/Update IBM inventory list and compliance related databases or similar Databases.
• Maintain the device inventory list for the client when needed, Maintain the software/firmware for all the devices up to date
• Subscribe to vendor notifications for the managed devices for vulnerabilities and review/validate/apply security patches pro-actively.
• Perform device activation / deactivation as per IBM service activation and deactivation process.
• Maintain the IP address inventory and allocate new IP address when required by business.
• Engage third part vendors to resolve hardware issues and follow up till closure
• Monitor vendor End of Life / End of Support notifications for all In Scope Devices and inform the client.