Job Description
Position General Duties And Tasks
Governance, Planning & Readiness (Pre-Migration)
Application & Dependency Assessment
Identify all applications hosted in Cyberjaya Data Centre, categorizing by:
Environment: MY PROD / SG DR
Business criticality (Baseline/Important/Critical)
Recovery Time Objective (RTO) / Recovery Point Objective (RPO) requirements
Produce Detailed Application Dependency Mapping Including
Upstream and downstream systems
External integrations (e.g., CTOS, CCRIS, CBM, SOA gateways, MQs, APIs)
Shared services (LDAP, SMTP, monitoring tools, batch schedulers)
Identify Hard Dependencies Such As
IP addresses, VLANs
Hostnames
Firewall rules
Certificates
Compliance & Regulatory Alignment
Validate data residency requirements per BNM, PDPA, and OCBC internal policies
Confirm segregation requirements for SG DR vs MY PROD environments
Ensure Application Architecture Complies With
Environment isolation
Access control segregation
Audit and logging standards
Risk & Impact Analysis
Perform Application Impact Assessment Covering
Downtime tolerance
Batch window sensitivity
Month-end / quarter-end constraints
Identify single points of failure
Document Risks And Mitigation, Including
Migration failure
Latency impacts
Data corruption
Rollback complexity
Design & Architecture Validation
Network & Connectivity Validation
Review New Network Design From Infrastructure/Network Teams
New IP ranges (if required)
VLAN separation
Validate Application Connectivity Assumptions
Static IP whitelisting
Firewall directionality
Northbound / Southbound traffic flows
Application Configuration Review
Identify Application Configurations Requiring Changes
Properties files
Connection strings
MQ channels & queues
API endpoints
Identify hardcoded values that require remediation
Assess Application Readiness For
IP address changes (if required)
Hostname changes (if required)
DNS re-pointing (if required)
Non-Functional Readiness
Validate Expected Performance In The Re-stacked Environment
Latency sensitivity
Bandwidth needs
Confirm High Availability (HA) and clustering behavior post-restack
Pre-Migration Preparation
Environment Clean-up & Standardisation
Remove obsolete configurations
Decommission unused application components
Backup & Data Protection
Ensure recent full backups have been completed
Validate backup restore tests
Confirm database/application backup ownership and rollback data retention policies
Certificate & Security Readiness
Validate TLS/SSL Certificates (if Required)
IP-bound vs hostname-bound certificates
Expiry checks
Coordinate certificate renewal or re-issuance if needed
Review application secrets management (vault references, keystore paths)
Migration / Restack Execution Support
Change & Release Management
Raise and track application change requests (including emergency changes)
Support Change Approval Committee (CAC) With
Impact summaries
Rollback steps
Align migration windows with business calendars and batch windows
Application Migration Activities
Support application shutdown/startup sequencing during restack
Handle cluster node management if applicable
Validate configuration updates post-move
Coordinate closely with Wintel/Unix, Database, Network, and Storage teams
Real-Time Monitoring During Cutover
Monitor application logs, error rates, and connection failures
Perform smoke tests immediately after migration
Provide real-time status updates to WAR room and stakeholders
Post-Migration Validation & Stabilisation
Functional Validation
Execute Application Validation Checklist
Login, transactions, batch submissions, message flows
Validate integration with external bureaus and downstream systems
Confirm batch jobs complete successfully
DR Readiness Validation
Validate SG DR Environment Post-segregation
Connectivity from SG
Replication health
Support DR drills or simulations if required
Update DR runbooks and procedures accordingly (if required)
Performance & Stability Monitoring
Monitor latency, throughput, and error spikes
Support hypercare and transition to Business-As-Usual (BAU)
Documentation & Knowledge Management
Document Updates
Update application architecture diagrams, network connectivity diagrams and environment topology (if required)
Knowledge Transfer
Brief Support Teams On
New environment layout
New IP ranges and hostnames (if required)
Update knowledge transfer materials and FAQs
Stakeholder & Communication Responsibilities
Act as Single Point of Contact (SPOC) for:
Application Teams
Business users
Project teams
Infrastructure teams
Provide Regular Updates On
Migration status
Risk assessments
Go-Live sign-off confirmation
Support audit and evidence requests post-implementation
Post-Implementation Review (PIR)
Participate In PIR Sessions To
Capture lessons learned
Identify gaps and remediation items
Highlight Improvements For
Automation
Configuration hygiene
Support closure of all change records
