Miller was the former Senior Vice President and General Manager of
Cartoon Network Studios in
Burbank, California, having assumed the title from 2000 to 2021. He was formerly Vice President of Production at
Nickelodeon Animation Studio, Vice President of Production at
Hanna-Barbera, On January 8, 2021, Miller founded a new animation production studio, Pat and Mike Productions, Inc. Miller serves as both
chief executive officer and
secretary, while former Cartoon Network Studios partner Jennifer Pelphrey serves as
chief operating officer. On March 19, 2021, Miller left his job at Cartoon Network Studios, as part of a company wide restructuring due to the merger with
AT&T. ==Personal life==