My first job in animation was on The Simpsons. I was hired when 
Producers of the show walked by my desk at Cal Arts in my freshman year 
and left me a note, offering me to test to take as Animator. The test 
was to turn Skinner's Mom. I passed the test, was hired as a Full 
Animator (not Assistant) and never finished my second year at CalArts. 
Here is a link to my page in The Simpsons Wikipedia. It is not 100% 
accurate, there are many other contributions I made to The Simpsons 
while I worked for 20th Century Fox and Klasky Csupo. I will try and 
update this information in the near future. Some of the additional 
Simpsons work I did was publicity art/press photos for the Main 
Characters, Storyboard, Prop and Background Design for some episodes, 
completely animated and designed my own Itchy & Scratchy cartoon 
(solo), "Sundae Bloody Sunday", Character Design, Animator on several 
Butterfinger commercials, Animator on the second version of the Main 
Title for The Simpsons.
Sundae Bloody Sundae (YouTube):
https://youtu.be/AzPpkEJBJhM?si=-otsj1n9wvCBIb6R
NOTE: I (and the entire crew) won my first Emmy (certificate) for Best Animated Series working on The Simpsons.
The Simpsons Wikipedia link is here:
https://simpsonswiki.com/wiki/Frederick_J._Gardner_III