Complex sentence: In 2002 Schettino was hired by Costa Crociere, a subsidiary of Carnival Corporation & plc. He started as an official in charge of security and then moved up to become second-in-command.
Split into simpler sentences: In 2002 Schettino was hired by Costa Crociere, a subsidiary of Carnival Corporation. Starting as an official in charge of security he moved up to become second-in-command.