Diagnose and resolve incidents affecting business-critical applications.Use SQL to investigate application and data issues.Manage service requests in line with agreed SLAs.Investigate software defects and coordinate fixes.Work with internal technical teams and third-party suppliers.Carry out root-cause analysis on recurring issues.Complete system performance and integrity checks.Maintain technical and knowledge-base documentation.Keep stakeholders updated throughout incidents and investigations.Follow established incident, problem and change-management processes.