Collier was recently named president and general manager of both AMC Networks channels, and has now elevated Joel Stillerman and Jan Diedrichsen to top posts.
Stillerman, who has overseen development of AMC shows such as The Walking Dead and prequel series Fear the Walking Dead, becomes president of original programming and development for AMC and SundanceTV, adding the latter to his portfolio.
Marketing chief Diedrichsen moved to the new post of executive director of SundanceTV. In the role he will report to Collier and focus on developing and expanding the channel brand.
Collier welcomed his new team saying: “Joel has had a meaningful impact on the growth and evolution of AMC, and SundanceTV will benefit from his programming expertise and leadership.
“Jan is a seasoned and talented executive and his role will be critical to the ongoing growth and development of SundanceTV as a network, a brand and a business.”