Complex sentence: Previously, he served as the President of the European Jazz Festivals Association between 1998 and 2002, and as a member of the Advisory Board of the Istanbul 2010 European Capital of Culture Agency.
Split into simpler sentences: Previously, he served as the President of the European Jazz Festival Association between 1998 and 2002. He was a member of the Advisory Board of the Istanbul 2010 European Capital of Culture Agency.