For the management of public telecommunication networks TMN (Telecommunications Management Network) receives a wide acceptance from network operators and suppliers. Although TMN defines different layers going from the service oriented Business layer towards the Element layer, it is currently very much focused on network and element management. On the other hand TINA (Telecommunications Information Networking Architecture) integrates the service management layers with the network management layers in a coherent way relying on a distributed software execution platform (DPE). This paper focuses on possible interworking schemes between both architectures where the strong elements of each are combined: TINA for the service management and TMN for the network management. Several candidate interworking/ migration schemes between CORBA/IDL and CMISE/GDMO are investigated in the context of a concrete implementation, namely the interworking between a TMN platform based on HP OpenView and the TINA compliant platform developed in the context of the ACTS VITAL project.