Greg is a giant-screen documentary filmmaker who has produced and directed many of the most successful films shown in IMAX® theatres, including the box-office hit Everest and the Academy Award®-nominated films The Living Sea and Dolphins. His 2016 film National Parks Adventure received the Best Film of the Year award from the Giant Screen Cinema Association. With 40 giant-screen films to his credit, MacGillivray has shot more 70mm film than anyone in cinema history—more than two million feet. He is the first documentary filmmaker to reach the $1 billion benchmark in worldwide ticket sales.

MacGillivray and his wife, Barbara, founded the MacGillivray Freeman Films Educational Foundation, a non-profit public charity devoted to promoting lifelong learning through giant-screen films and companion programming.