Mark Miller has departed Thunderbird and its factual-focused subsidiary Great Pacific Media (GPM), Playback has learned.

The news comes less than five months after Miller stepped down from his dual role as Thunderbird president and GPM CEO, the latter of which he founded with Blair Reekie in 2010.

In December, Vancouver-based Thunderbird said Miller was stepping down from his executive posts as he transitioned into a more production-focused role within the company. However, an internal memo from last week, seen by Playback Daily, said Miller had officially departed the company as of Thursday (April 29).

Following Thunderbird’s acquisition of GPM in December 2014, Miller climbed the ranks within the Vancouver-based company. He was named co-president of Thunderbird, alongside Jennifer Twiner McCarron in 2017, and in 2018 became the company’s sole president, helping to guide the company as it went public.

Miller’s departure represents the end of an era at GPM, as both of the company’s co-founders have now left the company. Reekie departed last year, with David Way being promoted to president of GPM.

Miller has been a central figure in Vancouver’s unscripted industry for more than a decade, executive producing series including Game of Homes, Save My Reno, High Arctic Haulers, Queen of the Oil Patch, Mud Mountain Haulers, Highway Thru Hell and its spin-off Heavy Rescue: 401 (pictured).