Complex sentence: He is currently working as a full-time freelance zoological consultant, media consultant, and author, specializing in cryptozoology, for which he regularly travels worldwide and appears frequently on television and radio.
Split into simpler sentences: He is currently working as a full-time freelance zoological consultant, media consultant, and author, specializing in cryptozoology, for which he is internationally renowned. During the course of his continuing researches and writings, he regularly travels worldwide, and also appears frequently on television and radio.