Ian began his career a professional basketball player.
After his retirement from basketball he began his second career as a stuntman and actor.
He is best known for portraying Predators in the movies Alien vs. Predator and Aliens vs. Predator: Requiem.
Ian alsoportrayed one of the “Engineer” aliens seen in Ridley Scott’s 2012 science fiction film, Prometheus.
In 2010, he played Sheikh Sulieman in Clash of the Titans.
He has portrayed various characters requiring a physically tall actor in the HBO series Game of Thrones, including White Walkers in season 1 and season 2 and a giant in the opening episode of season 3.
Ian has also played several parts in various Star Wars movies.