[2] Atoms is the creator of Cartoon Network's animated television series The Grim Adventures of Billy & Mandy,[citation needed] Evil Con Carne, and has developed a Billy & Mandy spin-off Halloween special called Underfist: Halloween Bash.

As for C. H., he voiced the character Fred Fredburger in several episodes of Billy & Mandy,[2] alongside a brief cameo of Chowder in Underfist.

[8] As of 2012, Atoms begun developing a new project entitled Dead Meat, "an awesome black comedy/buddy action/puppet gore web series",[9] which was still in production as of January 2020 and had a successful Kickstarter campaign as of November 15, 2013.

This fell through and, in early 2020, Atoms announced that the project is shelved indefinitely and all backers will be refunded due to expensive costs and contractual issues.

[citation needed] In 2020, he provided several additional voices for the adult animated web series Hazbin Hotel,[12] as he met creator Vivienne Medrano during work on Dead Meat.