Preferred — strong differentiators: End-to-end OAS installation and configuration on Linux; OBI-to-OAS migration planning and execution; WebLogic domain creation or major upgrades; BAR, RPD, catalog, and repository migration; advanced report and semantic-model troubleshooting; Oracle EBS reporting architecture and integrations; BI Publisher administration; SSO, LDAP, and modern identity-provider integration; performance tuning across analytics, middleware, database, and operating-system layers; disaster-recovery design and testing; automation of patching, health checks, service control, deployments, and credential rotation; and ownership of complex Oracle Support service requests. Oracle middleware and operating platform: Oracle Fusion Middleware and WebLogic administration; Linux administration for middleware workloads; Node Manager and managed-server support; Oracle CPU, WebLogic, OAS, and JDK patching; certificates, TLS, keystores, and Java truststores; RCU schemas and service-account credential dependencies; database data sources, connection pools, drivers, ports, and network aliases.