The time-triggered message-triggered object (TMO) structuring scheme has been established to remove the severe limitations of conventional object structuring techniques in developing real-time distributed computing (RTdC) applications.To facilitate the construction of TMO-structured RTdC applications consisting of CORBA-compliant TMO components, a middleware named TMO Execution Support (TMOES) has been created. TMOES itself is a CORBA object that can be supported by any ORB conforming to the standard specifications. Its instantiation must reside in every computing node involved in RTdC applications. This paper presents the architecture and an implementation model of TMOES.