Network Engineer

DNA INFOTECH PTE. LTD.; Singapore; On-site; SGD 100,000 - 167,000; Full time

Job summary

DNA INFOTECH PTE. LTD. in Singapore seeks an experienced Network Migration Specialist to plan, design, and execute switch migrations with strong security hardening and monitoring integration.

You will validate hardware/software, upgrade firmware, and coordinate with security, servers, and operations to minimize downtime while delivering updated network diagrams and documentation.

Qualifications

• Plan and design network migrations with dependency analysis.
• Validate switch hardware, software versions, licensing and compatibility.
• Develop implementation, migration, rollback and testing plans.
• Identify dependencies, risks and outage requirements.
• Coordinate with security, server, application and operations teams.
• Upgrade firmware/OS to approved versions and review configurations.
• Implement network security hardening per standards.
• Document diagrams, configurations and migration procedures.

Responsibilities

• Plan migration steps and validate architecture.
• Build and configure switches to approved versions.
• Implement security hardening and disable unused ports.
• Set up monitoring/alerting for SNMP, Syslog, NetFlow and performance.
• Execute migration with pre-migration checks and rollback plan.
• Perform testing, validation and post-migration support.

Skills

Network Switch Migration

Network Infrastructure

Network Security Hardening

Monitoring & Alerting

Network Documentation

Stakeholder Coordination

Job description

Primary Skills:Network Switch Migration | Network Infrastructure & Configuration | Network Security Hardening

Secondary Skills:Monitoring & Alerting | Network Documentation | Stakeholder Coordination & Support

JD:

Migration

1. Planning and Design Review network architecture, design documents, and migration requirements. Validate switch hardware, software versions, licensing, and compatibility. Develop implementation, migration, rollback, and testing plans. Identify dependencies, risks, and outage requirements. Coordinate with security, server, application, and operations teams.

2. Switch Build and Initial Configuration Upgrade firmware/OS to approved versions. Review and Configure:

3. Security Configuration Implement network security hardening in accordance with company standards. Disable unused ports and services. Ensure compliance with security and audit requirements.

4. Monitoring and Alerting Setup Integrate switches with enterprise monitoring tools. Ensure the below is configured and working as per the need: SNMP monitoring Syslog forwarding NetFlow/sFlow where applicable Performance and capacity monitoring Interface utilization monitoring Environmental monitoring (temperature, power supply, fan status) Configure operational alerts for: Validate monitoring data is received by monitoring platforms.

5. Migration Execution Perform pre-migration validation and health checks. Backup existing switch configurations. Execute migration according to approved implementation plan. Coordinate migration with application and infrastructure teams. Minimize downtime and business impact.

6. Testing and Validation Perform connectivity testing. Resolve any issues identified during testing.

7. Documentation Create and update: Network diagrams Switch configuration records Port mappings IP addressing documentation Security configuration documentation Monitoring and alerting configuration records Maintain implementation and rollback procedures.

8. Post-Migration Support Provide post-implementation monitoring and support. Review logs and alerts for abnormalities. Optimize configurations where required. Conduct knowledge transfer to operations team. Obtain stakeholder sign-off after successful migration. Deliverables Approved switch build configuration. Security hardening checklist completed. Monitoring and alerting integrated and tested. Configuration backup and rollback plan. Updated network diagrams and documentation. Migration report including validation results and sign-off. Prepare all the required documents associated as part of the Release readiness.