Database Administrator

h3About the Role /h3 pNISH Tech BV is looking for an experienced Database Administrator to manage, maintain and evolve on-premises and cloud-based database environments. The role focuses on the administration and operation of Oracle and Microsoft SQL Server databases, alongside PostgreSQL databases hosted on Microsoft Azure. You will ensure database availability, performance, security and compliance through proactive monitoring, patching, performance tuning, backup and recovery, and infrastructure maintenance. /p pWorking closely with application owners and database users, you will provide technical support, resolve operational issues and contribute to the continuous improvement of database architectures and hosting platforms. The role also involves security hardening, vulnerability remediation, access management and auditing, alongside broader systems administration activities covering Windows servers, IIS, Active Directory/Entra ID and Azure DevOps deployment pipelines. /p h3Key Responsibilities /h3 ul liAdminister and operate on-premises Oracle and Microsoft SQL Server databases and Azure-hosted PostgreSQL databases. /li liPerform database installation, configuration, patching and routine maintenance. /li liMonitor database availability, health and performance, and conduct performance tuning. /li liManage database backup, recovery and restoration procedures. /li liConfigure and maintain database listeners, tablespaces and user accounts. /li liAutomate database administration tasks through scripting and automation. /li liEvolve and maintain database infrastructure, architectures and hosting platforms. /li liImplement system hardening, user access controls and database auditing. /li liIdentify database security vulnerabilities and coordinate remediation activities. /li liAnalyse security audit findings, database logs and operational events. /li liProvide technical support to application owners and database users. /li liPrepare high-quality technical documentation, reports and client presentations. /li liSupport Windows Server and IIS administration activities. /li liAdminister or support Active Directory and Microsoft Entra ID. /li liContribute to Azure DevOps deployment pipelines, certificate renewals and operational troubleshooting. /li /ul h3Required Skills /h3 h3Mandatory Skills /h3 ul liDatabase administration and operations. /li liOracle Database administration. /li liMicrosoft SQL Server administration. /li liPostgreSQL administration in Microsoft Azure. /li liDatabase installation, configuration and patching. /li liDatabase performance monitoring and tuning. /li liBackup and recovery management. /li liListener configuration, tablespace management and user administration. /li liAutomation and scripting for database operations. /li liDatabase security, system hardening, access control and auditing. /li liVulnerability identification and remediation. /liliTechnical documentation and operational troubleshooting. /li /ul h3Nice-to-Have Skills /h3 ul liWindows Server administration. /li liIIS administration. /li liActive Directory and Microsoft Entra ID. /li liAzure DevOps deployment pipelines. /li liCertificate renewals and related operational activities. /li /ul h3Experience /h3 pAt least 10 years of relevant professional experience in database administration across on-premises Oracle and Microsoft SQL Server environments and Azure-hosted PostgreSQL databases is required. /p h3Location Work Model /h3 pLocation: Brussels, Belgium /p pWork Model: Hybrid /p h3About NISH Tech BV /h3 pNISH Tech BV is a technology and recruitment partner connecting skilled IT professionals with challenging projects across Belgium and Europe. We focus on creating strong matches between professionals and organizations through technical expertise, market knowledge and a personal approach. Our goal is to build long-term professional partnerships through quality, transparency and reliable recruitment support. /p