This article describes the rationale, implementation, interventions and preliminary findings of a Belgian interdisciplinary internal liaison team in a 1470-bed teaching hospital. The motive to start the team was threefold: the ageing of the inhospital population, the conclusion that health care professionals working on non-geriatric wards often lack the necessary skills to deal with older patients' needs and Belgian law, obliging each general hospital to set up an internal liaison team. Our team aims at detecting geriatric patients at risk, assisting health care professionals in caring for older patients and sensitizing them regarding optimal geriatric care. The article explains the underlying philosophy and strategy for implementation, focusing on the concepts of reciprocity, flexibility and cooperation. The preliminary results are based on a process evaluation of 719 consultations carried out from November 2004 to November 2006, a time registration, and a Strengths, Weaknesses, Opportunities, and Threats analysis (SWOT). Although our data are preliminary and the implementation of the team was pragmatic rather than research driven, they provide insight into the development, implementation, functioning and interventions of a Belgian interdisciplinary internal liaison team.