Complex sentence: He has been in the animation industry since 1988 where he started as an in-betweener for Fil-Cartoons, Inc (a subsidiary of Hanna-Barbera) located in Manila, Philippines.
Split into simpler sentences: He has been in the animation industry since 1988. He started as an in-betweener for Fil-Cartoons, Inc (a subsidiary of Hanna-Barbera) located in Manila, Philippines.