Network Security Engineer

Migration Responsibilities & Scope

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 settings.

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 following are configured and working as needed:

  • 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.

• Validate that 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 the 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 the operations team.

• Obtain stakeholder sign-off after a 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

• All required documents associated as part of release readiness
  

  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
  [email protected]

  EA Registration Number: R26159541.

  Cornerstone Global Partners Pte Ltd (EA License: 19C9859)