Chair, Workshop on “Spatio-Temporal Digital Twins”, 28th International ACM Conference on 3D Web Technology, 2023, San Sebastian, Spain, October 9 - 11, 2023

Chair, Workshop on “Merging Geospatial Technologies with Cross Reality in the context of smart manufacturing systems”, ACM-IEEE International Symposium on Mixed and Augmented Reality (ISMAR), Recife, Brazil, 09-13 November 2020

 Co-Chair, Workshop on “XR-aided Design (XRAD): next generation of CAD tools”, ACM-IEEE International Symposium on Mixed and Augmented Reality (ISMAR), 2019, 10-18 October 2019, Beijing, China

 Chair of the Splinter Session "Other Geo-related Projects" Sixth GEO European Projects' Workshop- Rome 7&8 May 2012 .

Chairman of the NATO Advanced Research Workshop on Geographical Information Processing and Visual Analytics for Environmental Security Conference, Trento 2008

Chairman of the EUROGRAPHCIS Italian Chapter Conference, Trento2007

Chairman of the group WG2 “System prototype definition” at the workshop “ECOTER” Development of a prototype system for sharing information related to acts of terrorism to the environment, NATO, Headquarter, Brussels, September 26, 27 2005