The Micro and Nanoanalytics Facility MNaF is the central competence center for complementary material characterization and is an important platform for interdisciplinary materials research at the Faculty of Science and Technology of the University of Siegen. The MNaF is home to modern characterization instrumentation as well as to a large number of sample preparation tools and makes these and the associated methodological expertise available to uni-internal users and external cooperation partners. These include advanced light, electron and ion microscopy, X-ray diffraction and tomography and scanning probe techniques. In addition, MNaF users have access to state-of-the-art micro- and nanoanalytical methods, such as aberration-corrected S/TEM, atomic probe tomography and advanced synchrotron X-ray techniques, beyond the equipment available at the facility. In addition to this portfolio, MNaF offers user trainings, dedicated courses and professional characterization service. The Core Facility is led by the MNaF Executive Board, which consists of the heads of the involved expert groups. The board further develops the center according to user needs. In addition to the members of the MNaF Executive Board, the managing director is the central contact for external cooperation requests and ensures the best possible support for our device users.