The cloud networks managed by SDN can have multi-tier policy and rule conflicts. The application plane can have conflicting user-defined policies, and the infrastructure layer can have Open-Flow rules conflicting with each other. There is no scalable, and, automated programming framework to detect and resolve multitier conflicts in SDN-based cloud networks. We present an objectoriented programming framework-SDN Security Operation Center (SDNSOC), which handles policy composition at application plane, flow rule conflict detection and resolution at the control plane. We follow the design principles of object-oriented paradigm such as code-re-utilization, methods abstraction, aggregation for the implementation of SDNSOC on a multi-tenant cloud network. The key benefits obtained using this approach are (i) The network administrator is abstracted from complex-implementation details of SFC. The end-to-end policy composition of different network functions is handled by an object-oriented framework in an automated fashion. We achieve 37% lower latency in SFC composition compared to nearest competitors-SICS and PGA. (ii) Policy conflict detection between the existing traffic rules and incoming traffic is handled by SDNSOC in a scalable manner. The solution scales well on a large cloud network., and 18% faster security policy conflict detection on a cloud network with 100k OpenFlow rules compared to similar works-Brew, and Flowguard.