Since 2000 he is Production Coordinator of Baltimore Opera Company and since 2004, the Artistic Consultant for National Opera House of Belgrade. From ’95 to ’98 he was artistic  secretary  of “Spontini Classic” in Maiolati Spontini. He became President of Centro Studi Spontini in 1999. He was the promoter of the Pergolesi Spontini Foundation project and from 2000-2005  he was the Vice–President of this Foundation and he has organized several Pergolesi Spontini Festivals.
Since August 2006 William Graziosi has been designated  as an  Artistic and Organizational Consultant of Ministry of Culture and Information of Kazakihstan.

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