1. Bundesanstalt für Materialforschung und ‐prüfung (BAM), Division 8.2: Non‐destructive Testing Methods for Civil Engineering Berlin Germany
2. Universität der Bundeswehr München Institute for Structural Engineering Neubiberg Germany
3. HTW Berlin — University of Applied Sciences Department 2: Engineering—Technology and Life Berlin Germany
4. Helmut Schmidt University/University of the Federal Armed Forces Hamburg, Chair of Engineering Materials and Building Preservation Hamburg Germany