Database Administrator (MSSQL, MongoDB)

Location: Ang Mo Kio, Singapore Experience Required: 5+ years

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

Key Responsibilities

• 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, and storage/IOPS constraints

• Perform root cause analysis and implement preventive measures

• Manage MSSQL Always On Availability Groups; monitor replication/failover health; perform patching and cumulative updates; maintain backup/restore strategy; conduct DR drills; optimize indexing and execution plans

• Manage MongoDB Replica Sets and automatic failover; monitor memory, disk, and index performance; manage backup/restore and recovery validation; maintain cluster health and sharding

• Conduct proactive health checks, analyze query execution plans and slow queries, perform tuning and optimization, and forecast capacity growth

• Review database scripts prior to production deployment; support data migration and release windows; validate stability post-deployment; ensure rollback/recovery procedures are in place

• Implement database security hardening, manage role-based access control and auditing/logging, support vulnerability assessment remediation, and ensure compliance with government security policies

Requirements

• 5-8+ years of DBA experience

• Strong hands-on experience with Microsoft SQL Server (Always On, HA, performance tuning) and MongoDB (Replica Sets, Backup/Restore)

• Experience supporting 24/7 mission-critical systems and handling Severity 1 production incidents

• Experience supporting application deployment (data patching, data seeding, etc.)

• Strong troubleshooting and analytical skills

• Preferred: experience in Singapore Government projects; familiarity with virtualized/containerized environments, microservices architecture, and integration-heavy systems (Kafka, REST APIs, ETL); experience in ITIL-based incident management environments

• Calm and decisive during major incidents; strong communication skills during incident bridge calls; comfortable working in audit-heavy, compliance-driven environments

• Must be eligible for Government security clearance

Eligibility

Due to government security clearance requirements for this role, only Singapore Citizens are eligible to apply.