Full astronomer (Astronomo Ordinario) at INAF - Osservatorio Astronomico di Trieste since 2001.
Head of the European HST archive at ST-ECF/ESO (1989-92), PI of the archives at the TNG (1994-98), Co-I of the LBC instrument (1998-2006), Data Processing Centre Manager for Planck-LFI (1998-2005), PI of the DRACO project (2003-05). Since 2004, he has been the Italian coordinator of Virtual Observatory activities also in VO-related projects (VO-Tech, EuroVO-DCA, EuroVO-ICE and CoSADIE), funded within the EU Sixth and Seventh Framework Programmes.
He has done consultant activity for ESA and ESO in the fields of information systems and data processing and archiving, and was member of the Scientific Council of CDS, Strasbourg (chairman in 1994 and 1997). Between May 2007 and October 2008 he was Deputy Chair of the International Virtual Observatory Alliance (IVOA), and from November 2008 to May 2010 he was the Chair of IVOA. Between June 2004 and December 2011 he was the Director of the INAF Information Systems Unit.
Currently, he leads the Italian participation in the ASTERICS project funded by the EU Horizon 2020 programme and is Chair of its General Assembly; since 2007 he is member of the Project Office for the Science Ground Segment of the ESA Euclid mission; he is also Co-I for the LFI instrument of the ESA Planck mission since 1997, as responsible of the design of its Data Processing Centre.