Senior Systems & Database Administrator

Senior Systems & Database Administrator DIMIYA Tech is a global Technology and Talent Solutions provider helping organisations accelerate growth through technology, people, and innovation. Through DIMIYA Tech, we deliver Managed IT Services, Cybersecurity, Cloud Solutions, AI & Automation, Microsoft Dynamics 365, Salesforce, Data & Analytics, and Application Development services. Through DIMIYA Talent, we provide Technology Staffing, Offshore & Hybrid Teams, ERP & CRM Consultants, AI & Cybersecurity Specialists, and Finance & Business Operations professionals. We support clients across Australia, New Zealand, the United States, United Kingdom, Europe, and Asia with tailored, scalable solutions. The Role We are seeking an experienced Senior Database Administrator to take ownership of enterprise database environments, ensuring business-critical platforms remain secure, available, high-performing, and scalable. This role is responsible for administering SQL Server, MongoDB, and AWS database environments, while driving database performance, cloud optimisation, backup and disaster recovery, security, and data governance. The successful candidate will work closely with infrastructure, application, and business teams to support enterprise systems, reporting platforms, and future cloud and AI initiatives. Please note: This position requires full-time presence in AU time 9:00am – 5:00 pm AEST (5 days per week) fully remote Key Responsibilities Database Administration - Administer, monitor, and maintain Microsoft SQL Server, MongoDB, and AWS database environments. - Perform database installations, upgrades, migrations, patching, and ongoing maintenance. - Monitor database health, capacity, availability, and performance. - Optimise SQL queries, indexing, execution plans, and overall database performance. - Troubleshoot and resolve database performance, replication, connectivity, and data integrity issues. Cloud & AWS - Administer and support AWS database services, including Amazon RDS. - Support cloud migrations and hybrid database environments. - Improve scalability, resilience, and database performance in cloud environments. - Implement security best practices across cloud-hosted databases. Backup, Recovery & High Availability - Manage database backup, recovery, and disaster recovery strategies. - Conduct regular restoration testing and disaster recovery exercises. - Support replication, clustering, failover, and high-availability solutions. - Maintain Recovery Time Objectives (RTO) and Recovery Point Objectives (RPO). Security and Data Governance - Implement database security, encryption, auditing, and access controls. - Manage database permissions, privileged access, and vulnerability remediation. - Support compliance with security and governance frameworks such as ISO 27001. - Improve data quality, governance, retention, and lifecycle management. Enterprise Applications and Reporting - Support databases underpinning enterprise business applications and reporting platforms. - Optimise database performance to improve reporting and analytics. - Assist with data migrations, integrations, and application upgrades. - Ensure data accuracy, reliability, and availability across enterprise systems. Required Skills & Experience - 4+ years’ experience as a Database Administrator in enterprise environments. - Advanced experience with Microsoft SQL Server administration and performance tuning. - Experience administering MongoDB environments. - Experience with AWS database technologies, including Amazon RDS. - Strong knowledge of SQL optimisation, indexing, query tuning, backup, recovery, replication, and high availability. - Experience with database security, encryption, auditing, and access management. - Experience supporting production-critical systems and cloud-based database platforms. - Scripting experience using PowerShell, Python, or SQL is highly desirable. Highly Desirable - Experience with Microsoft Azure and hybrid cloud environments. - Experience supporting enterprise applications such as Salesforce, Power BI, ERP, or CRM platforms. - Knowledge of data governance, master data management, and information lifecycle management. - Experience working within ISO 27001 or similar security frameworks. - Microsoft SQL Server, AWS, MongoDB, or related certifications. Success Measures The successful candidate will contribute to: - Improved database performance, stability, and availability. - Reliable backup, disaster recovery, and high-availability capabilities. - Stronger database security, governance, and compliance. - Improved reporting performance and data reliability. - Increased automation and operational efficiency. - A scalable, secure, and cloud-ready data platform that supports future business growth and AI initiatives.