1) Experinace into Splunk Cluster Administration (Setup, Expansion)
2) Day to Day Operations ( which includes Deploying Apps, Meta Data Objects, Search Optimisation etc)
3)Continuous Monitoring of the setup & Support.
4)Large Scale Cluster (Single Site, MultiSite & Disaster Recovery) Capacity Planning and Sizing
5) Experiance into Debugging, Problem Isolation & Performance Tuning