Notable as the animation director for over eighty episodes of SpongeBob SquarePants, Smart is also recognized for his work on The Simpsons, Clone High, Rocko's Modern Life, and The Wild Thornberrys, among other series.
At the start of his career, he worked as an assistant animator on both The Chipmunk Adventure and The Little Mermaid.
In 2013, he served as the animation timing director for ten episodes of Sanjay and Craig.
He was born and raised in Los Angeles, California.
He contributed to both Rugrats and Aaahh!!! Real Monsters, which were both series featuring voice acting work by Christine Cavanaugh.