Complex sentence: Since September 1999 he has been the editor of "Theoria", the only international, refereed, philosophy journal published in Sweden, and since 2001 he has been vice chairperson of Riskkollegiet, a Swedish association for risk research.
Split into simpler sentences: Since September 1999 he has been the editor of Theoria, the only international, refereed, philosophy journal published in Sweden. Since 2001 he has been vice chairperson of Riskkollegiet, a Swedish association for risk research.