Maintaining System availability, Storage Management, System and Network Security, Partition Management, Performance Management and Tuning, Network Management, Instalation Management, General Administrative Tasks, Problem Determination & analysis of escalated incidents,   Change Management, User Administration, Maintenance and Upgrade of UNIX Operating systems, Hardware and software call management, disk management including migrating partitions, replacing disks, mirroring, unmirroring disks, Extensive use of LVM, creating Volume Groups, Logical volumes, HMC and FSM management