Dba a) perform database indexing and other db performance tunings per ibms recommendation. b) work closely with application developers, system administrators, and other it staff to ensure the reliability, security and efficiency of the as400 db2 and dba applications in the c4i database environments. e) monitor and optimize database performance, including query optimization, index management, and resource utilization. i) diagnose and resolve database-related issues, including performance bottlenecks and system errors. j) work closely with application developers to design and implement efficient database schemas, queries, and stored procedures. k) create and maintain comprehensive documentation of database configurations, procedures, and standards. l) ensure databases comply with industry standards and regulatory requirements. c) manage and maintain db2 databases on the as400 platform, including installation configuration, and upgrades. f) develop and implement backup and recovery strategies to ensure data integrity and availability. d) design, implement db2 databases on as400, such as, creating and managing objects.