The mission of the present SEEMP (Single European Employment Market-Place) proposal is: to design and implement in a prototypal way an interoperability architecture for public e-Employment services which encompasses cross-governmental business and decisional processes, interoperability and reconciliation of local professional profiles and taxonomies, semantically enabled web services for distributed knowledge access and sharing. In particular, the SEEMP project will develop an EIF-compliant federated architecture and interoperability middleware as well as applicative plug-in services to allow existing National/Local job market places and data warehouses to be interoperable at pan-European level by overcoming state-of-the-art limitations.