He wrote on SpongeBob for a decade and had written on almost 100 episodes. During his time while he was still writing, Casey and Zeus were among the most loyal writers of the crew, being the only writers besides Luke Brookshier and Marc Ceccarelli to write for season 9 after the departure of Aaron Springer in the previous season.
In 2012, three years before Stephen Hillenburg returned to work for SpongeBob in 2015, after the death of Ernest Borgnine in July 8, 2012, he stated on Twitter that he no longer wrote anymore SpongeBob episodes because he wanted to work for Uncle Grandpa after production of "Yeti Krabs" ended before the episode premiered in Greece in 2013 and in the United States of America in 2015, so Kaz now takes over for him after he returned to the show after a long gone hiatus.
He was the Supervising Director and Creative Director in Uncle Grandpa, until the show ended in summer 2017. Since then he's been working on Unikitty! and Victor and Valentino, which Zeus Cervas also works on.