Infrastructure-as-a-Service (IaaS) is the most acceptable Cloud Computing delivery model that CIO and IT managers are exploring as they relook at their IT infrastructure. However, the adoption of IaaS faces challenge/concerns such as provider lock-in, reliability, and regulatory compliance for data locality. Our project, Aggregated IaaS Service, addresses this issue by providing a common interface and description of IaaS services across multiple IaaS service provider. We had developed an abstraction model for Iaas services and then provide the interface to the commercial IaaS providers: AWS and GoGrid. The Aggregated IaaS services are exposed to the users through a portal which allow users to subscribe, monitor, and manage the life-cycle of IaaS services from multiple providers. To meet the requirements of the enterprise users the IaaS Aggregator portal have modules such as corporate account management and policy enforcement modules which transform it from a single client user to corporate/company usage of IaaS service from multiple providers.