After joining The Simpsons in 1999, Edwin Aguillar would become a jack of all trades, serving as an animator, assistant director, character layout artist and more.
He holds credits as a character layout artist on 85 episodes of the show and has 32 assistant director credits as well.
Needless to say, Edwin Aguilar was a massive part of the Simpsons family and played a major role in maintaining the quality of the show.