<prompt> Translate the following text to EnglishKabla ya kuwasili katika kampuni mnamo Januari 1999, Bwana Casillas alikuwa na zaidi ya miaka ishirini ya uzoefu wa uongozi na usimamizi wa mafanikio katika sekta ya umma na binafsi.  <response>: Before coming to the firm in January 1999, Mr. Casellas had over twenty years of successful leadership and management experience in the public and private sectors. 