Database Administrator (MSSQL & MongoDB) – Day 2 Operations

Singaporean only

Database Administrator (MSSQL & MongoDB) – Day 2 Operations

Job Requirements

Role Overview

We are seeking a hands-on Operations DBA to support the mission-critical system operating in a secured environment.

This role focuses primarily on Production (Day 2) stability, high availability, incident response, performance tuning, and disaster recovery readiness for Microsoft SQL Server and MongoDB platforms supporting 24/7 operations.

The DBA will work closely with:

Day 2 Infra Engineers

Day 2 System Engineers

Day 2 Software Engineers

Security & Compliance teams

Key Responsibilities

1. 24/7 Production Database Operations

Provide L2/L3 support for MSSQL and MongoDB in Production and DR environments.

Participate in standby/on-call roster for critical incidents.

Troubleshoot and resolve:

Database outages

Always On failover issues

Blocking / deadlocks

Performance bottlenecks

Storage / IOPS constraints

Perform root cause analysis (RCA) and implement preventive measures.

2. High Availability & Reliability Management

Microsoft SQL Server (MSSQL)

Manage Always On Availability Groups.

Monitor replication and failover health.

Perform database patching and cumulative updates.

Maintain backup and restore strategy (Full, Differential, Log backups).

Conduct periodic DR drills and restoration validation.

Optimize indexing strategies and execution plans.

MongoDB

Manage Replica Sets and automatic failover.

Monitor memory, disk, and index performance.

Manage backup/restore and periodic recovery validation.

Maintain cluster health and sharding (if applicable).

3. Performance & Capacity Management

Conduct proactive health checks.

Analyze:

Query execution plans (MSSQL)

Slow queries and indexing (MongoDB)

Perform database tuning and optimization.

Forecast capacity growth and scaling requirements.

4. Change & Release Support

Review database scripts prior to production deployment.

Support data migration and release windows.

Validate database stability post-deployment.

Ensure proper rollback and recovery procedures are in place.

5. Security & Compliance (Government Environment)

Implement database security hardening.

Manage:

Role-based access control

Auditing and logging

Support vulnerability assessment (VA) remediation.

Ensure compliance with government security policies.

Maintain proper documentation and SOPs for audit readiness.

Technical Requirements

Mandatory

5–8+ years of DBA experience.

Strong hands-on experience in:

Microsoft SQL Server (Always On, HA, Performance Tuning)

MongoDB (Replica Sets, Backup/Restore)

Experience supporting 24/7 mission-critical systems.

Experience handling Severity 1 production incidents.

Experience in supporting application deployment (data patching, data seed etc.) 

Strong troubleshooting and analytical skills.

Preferred

Experience in Singapore Government projects.

Familiarity with:

Virtualized or containerized environments

Microservices architecture

Integration-heavy systems (Kafka, REST APIs, ETL)

Experience in structured ITIL-based incident management environments.

Soft Skills

Calm and decisive during major incidents.

Strong communication skills during incident bridge calls.

Proactive in identifying operational risks.

Comfortable working in audit-heavy and compliance-driven environments.

Security Requirement

Must be eligible for Government security clearance.