1. A system that facilitates management of Information Technology (IT), comprising: a non-transitory storage medium storing computer-executable code; a processor to execute the computer-executable code; an orchestration engine implemented by the processor executing the computer-executable code from the non-transitory storage medium, the orchestration engine to translate parameters from an upper layer interface of a heterogeneous IT infrastructure to constructs of a domain associated with a vendor specific solution and vice versa, wherein the domain fulfills a request for a modification of existing services currently being provided by the heterogeneous IT infrastructure, the non-transitory storage medium storing mappings of the constructs from the upper-layer interface to the domain; and a selection and implementation mechanism implemented by the processor executing the computer-executable code from the non-transitory storage medium to at least: determine the vendor specific solution from among a plurality of vendors that supply the existing services; and implement the vendor specific solution for integration with the heterogeneous IT infrastructure, to achieve the modification, wherein the upper layer interface comprises: a service-level agreement (SLA)-to-operational level agreement (OLA) IT service decomposition interface to decompose a description of one or more of service delivery automation, enterprise service management, and IT service management to an OLA IT service; and a service-level management resources interface to describe one or more of a Runbook, a service descriptor, and a security policy, the service-level management resources interface available to the SLA-to-OLA IT service decomposition interface, the SLA-to-OLA IT service decomposition interface using the service-level management resources interface to decompose the description to the OLA IT service.