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

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