In the current economic context, enterprises are struggling to obtain competitive advantages on the market, by exploiting the opportunities offered by information technology. The research in this paper aims to encourage the use of modern approaches in order to increase enterprise agility, through the transition to Service-Oriented Enterprise (SOE). The proposed solution is based on reaching a superior level of maturity of Service-Oriented Architecture (SOA) within the organization. SOE integrates the latest technologies with service-oriented business processes within an approach which requires the creation of an agile architecture and also major changes at organizational level. Structured in two main parts, the paper first highlights the SOA maturity levels in organization according to several factors, as well as the knowledge of the impact and the changes arising from SOA adoption. In addition, an architectural model for service-oriented enterprise is proposed, based on up-to-date technologies like SOA, Cloud Computing, Business Process Management and Case Management. This model is intended to facilitate the interoperability between business partners as well as the alignment of information technology strategy and business strategy, and ultimately to increase enterprise agility.