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