Senior Network Migration Engineer (10+ Years Exp)

MASSIVUE is a transformation-focused consulting firm that helps organisations achieve faster time-to-market, higher employee engagement, and stronger customer satisfaction. The company specialises in AI operating models, technology product co-creation, leadership coaching, and role based education to drive continuous improvement and innovation.

Role Summary

For one of our clients, we are looking for a hands-on Senior Network Migration Engineer with over 10 years of robust enterprise networking experience to lead end-to-end switch migrations, network hardening, and infrastructure upgrades. You will own the full migration lifecycle - from low-level design review and cutover planning to security hardening, tool integrations, and operational handover.

The ideal candidate has deep expertise in enterprise switching architectures, strict security compliance standards, and risk-managed execution with minimal downtime.

Key Responsibilities

1. Planning & Architecture Review

• Review low-level network architecture, migration specifications, and design collateral.
• Audit switch hardware models, OS/firmware versions, licensing tiers, and topology compatibility.
• Produce detailed Implementation, Migration, Rollback, and User Acceptance/Testing (UAT) plans.
• Identify operational dependencies, technical risks, and outage windows; coordinate across Server, Security, Application, and Operations teams.

2. Switch Build, Staging & Core Configuration

• Upgrade firmware and OS images to certified baseline builds.
• Configure layer-2/layer-3 switching protocols, VLANs, trunking, dynamic routing, link aggregation (LACP), spanning tree protocols (RSTP/MSTP), and management interfaces.

3. Network Security Hardening

• Harden switch configurations in strict compliance with corporate security benchmarks and audit mandates.
• Disable legacy protocols, non-secure management vectors, and unused ports/services.
• Implement port security, 802.1X authentication, access control lists (ACLs), control plane policing (CoPP), and AAA/TACACS+/RADIUS integrations.

4. Monitoring & Telemetry Integration

• Integrate network switches into central Network Operations Center (NOC) and Enterprise Monitoring platforms.
• Configure and validate:
• SNMP monitoring (v2c/v3) and secure Syslog forwarding.
• NetFlow / sFlow exports where applicable.
• Performance, throughput, buffer, and capacity telemetry.
• Environmental and chassis health monitoring (fans, redundant power supplies, thermal metrics).
• Set up threshold alerts and verify data ingestion into downstream dashboards.

5. Cutover Execution & Support

• Conduct thorough pre-migration health audits and generate full configuration backups.
• Execute cutovers during scheduled maintenance windows following approved change-management frameworks.
• Collaborate with cross-functional infrastructure and application teams to resolve anomalies in real time and eliminate unplanned downtime.

6. Validation, Testing & Operational Handover

• Perform comprehensive layer-1 to layer-4 connectivity, path redundancy, and failover tests.
• Provide post-cutover hypercare, analyze logs and alerts, and optimize configurations as needed.
• Conduct structured knowledge-transfer sessions with steady-state operations teams and secure formal stakeholder sign-offs.

7. Documentation & Release Readiness

• Author and update high-quality engineering artifacts:
• As-built network architecture and topology diagrams.
• Switch configuration baselines, IP management tables, and rack/port mapping spreadsheets.
• Security hardening matrices and telemetry integration records.
• Complete operational runbooks and rollback playbooks.

Key Deliverables

• Fully approved, production-ready switch build configurations.
• Completed and signed-off Security Hardening Checklist.
• Validated enterprise monitoring, telemetry, and alerting integrations.
• Pre-cutover backups, implementation playbooks, and tested rollback procedures.
• Complete documentation package (as-built diagrams, port maps, IP registers).
• Post-migration closure report with validation logs, test cases, and stakeholder sign-off.
• Formal Release Readiness documentation for change-advisory/audit boards.
  

Requirements & Qualifications
Core Eligibility & Experience

• Must be a Singapore Citizen or Permanent Resident (PR).
• Availability: Immediate joiners or those with very short notice periods strongly preferred.
• 10+ years of direct, hands-on experience in enterprise network design, implementation, and complex switch migration projects.

Technical Skills

Primary:

• Advanced switch migration execution across campus, branch, or data-center environments.
• Deep expertise in enterprise-grade switching platforms (e.g., Cisco Catalyst/Nexus, Arista, Juniper, or Aruba).
• L2/L3 protocol design (BGP, OSPF, EVPN/VXLAN, VLAN, STP, LACP, HSRP/VRRP).
• Enterprise network security hardening, port security, CoPP, AAA/RADIUS/TACACS+, and audit compliance.

Secondary:

• Network monitoring and observability tools (e.g., SolarWinds, PRTG, Splunk, Datadog, Cisco Prime/Catalyst Center, Grafana).
• Deep technical documentation skills (Microsoft Visio, technical runbooks, migration matrices).
• Stakeholder management, cross-functional cutover coordination, and vendor alignment.
  

Certifications (Advantageous)

• CCNP / CCIE (Enterprise, Routing & Switching, or Data Center) or equivalent certifications (JNCIP, Aruba Certified).
• ITIL Foundation certification with familiarity in structured change-management processes.

Availability: Immediate / Notice period up to 2 weeks

Role Type: Full-Time Contract

Equal Opportunity Employer & Recruitment Integrity Notice

• Contract Placement: This is a contract engagement deployed to our enterprise client.
• Equal Opportunity: We are committed to fostering a diverse and inclusive talent network as an Equal Opportunity Employer. All qualified applicants regardless of race, religion, gender, age, disability status, or background will be evaluated purely on merit, technical competencies, and client project requirements.
• Zero Recruitment Fees: We follow strict recruitment ethics and never charge candidates any fees (processing, placement, interview, training, or equipment deposits) at any stage of the recruitment or onboarding cycle. Any solicitations demanding financial payment are unauthorized and fraudulent.