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

Scarlett.Zhang@cornerstoneglobalpartners.com

EA Registration Number: R26159541.

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