Network Engineer (L2)

Quantum Infotech Solutions; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

Quantum Infotech Solutions in Singapore seeks an experienced network engineer to implement and maintain Cisco routers and switches, with strong IOS and NAC knowledge. You will support Aruba ClearPass/Cisco ISE, wireless controllers, and firewall platforms, while performing 24x7 incident response from client sites.

Role requires CCNP certification and hands-on troubleshooting, monitoring, and vendor coordination to ensure secure, reliable network operations at customer premises.

Qualifications

• Expert in Cisco routing and switching deployment and maintenance.
• Strong Cisco IOS knowledge and practical NAC support.
• Experience with Aruba ClearPass or Cisco ISE.
• Knowledge of wireless networks, APs, and controllers.
• Solid OSI/TCP-IP model understanding.
• CCNP certification is required or equivalent.
• Hands-on with network diagnostics and analytics tooling.
• Experience with firewall products (Cisco ASA, FortiGate, Palo Alto, Checkpoint).
• Familiarity with multi-vendor devices and certificates.
• On-site customer premises work with security posture adherence.

Responsibilities

• Perform on-site network operations and monitoring at customer premises.
• Handle problem resolution, escalation, and root cause analysis for routing and switching.
• Execute configuration changes and updates per procedures.
• Update the Service Desk with incident status and tickets.
• Conduct day-to-day network infra operations and performance monitoring.
• Coordinate with vendors for testing and preventive maintenance.
• Perform OS upgrades and patching as required.
• Provide 24x5 on-site availability and 24x7 standby for critical incidents.
• Prepare proactive incident reports within 24 hours for network issues.
• Escalate and coordinate with vendor support to resolve issues.
• Maintain inventory of devices, certificates, and firmware.
• Engage third-party vendors to resolve hardware issues and close tickets.
• Monitor End of Life / End of Support notices for devices.

Skills

Cisco routing & switching

Cisco IOS

NAC implementation & support

Aruba ClearPass / Cisco ISE

Wireless networks & APs

OSI/TCP-IP knowledge

Level-2 troubleshooting

CCNP certification

Network monitoring & analytics

Firewall knowledge (ASA/FortiGate/Palo

ClearPass/Cisco ISE & wireless control

F5 load balancers

Education

CCNP certification

Tools

Packet Tracer

Network monitoring tools

Firewall management tools

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.