Complex sentence: Costello asked Kent to team up with Bruno Bekkar, who was mostly known from working in his native New Zealand and Australia, and work a tour for the WWC while Costello served as their manager.
Split into simpler sentences: Costello asked Kent to team up with Bruno Bekkar, who was mostly known from working in his native New Zealand and Australia. Kent and Bellar worked a tour for the WWC while Costello served as their manager.