Complex sentence: Ji Woong is naturally the mood-maker, goofy and nice person, he work as the manager of the team (Jang Joon-sung the'Korea Snake' and Young-ho/John Kim).
Split into simpler sentences: Ji Woong is naturally the mood-maker, goofy and nice person. He works as the manager of the team (Jang Joon-sung the "Korea Snake" and Young-ho/John Kim).