 For three summers he conducted choruses and orchestras in England's Wells Cathedral.Haberlen has participated as a jury member and auditor in major choral festivals worldwide, including the St. Petersburg Choral Festival, the World Choir in Cardiff, Wales; Marktoberdorf, Germany; Riva del Garda, Italy; Budapest, Hungary; Denmark and Sydney, Australia.He has been honored by his selection as a jury member of two World Choral Olympics (Linz, Austria and Busan, Korea).