Designing management systems based on serviceoriented principles is a pragmatic approach to handle the challenges that distributed management is faced today. In order to conform to service-oriented principles, the elements of the management systems architecture – the management services – have to be designed along domain-specific concepts. Thus, modeling the domain IT Management becomes evident within service-oriented development processes. Considering existing approaches, domain modeling is not addressed explicitly, thus hampering the construction of management systems based on service-oriented principles. In this paper, we propose an ontology for the specification of the domain IT Management and present a refi ned development approach that enables the application of the presented ontology. The application of the ontology is demonstrated by designing management services for a standardized Incident Management Process.