Ken Wheatley is an experienced mercenary and hunter who is in command of the rescue operation of the dinosaurs on Isla Nublar.
Wheatley and his team accompanied Claire and the Dinosaur Protection Group to Isla Nublar to round up the dinosaurs and deliver them to another island reserve, since a volcanic eruption is imminent and will kill all the dinosaurs. However, after Owen tracks down the last surviving Velociraptor Blue, Wheatley and his men betray Owen by capturing Blue before leaving Owen, Claire and Franklin to die while keeping Zia to perform surgery on Blue since he needs her alive. As it turns out, Eli Mills plans to capture all the dinosaurs and sell them off as sentient weapons for profit, and that Wheatley is involved with it as he intends to collect a 'significant bonus' for his assistance. To that end, Wheatley and his men managed to capture several more dinosaurs before transporting them into their ship through cages while collecting their teeth as trophies to make as a necklace.
After reaching to the mainland, Wheatley soon learns that Owen and his friends have evacuated. To that end, he gets several of his men to capture them at gunpoint before putting them in a cell per Mills' orders. With the dinosaurs delivered to the auction, the event is disrupted when Owen releases a Stygimoloch to cause havoc, sending several people to flee away from the scene. In the ensuing chaos, Wheatley looks for Mills demanding his bonus before he attempts to go inside the cage of the genetically engineered dinosaur, the Indoraptor to retrieve one of his teeth as a trophy for his necklace, shooting him with a tranquilizer dart to keep him from attacking him. However, Wheatley soon discovers too late that the dinosaur was only faking its sedation, allowing the Indoraptor to sever and devour his arm. The Indoraptor then proceeds to maul Wheatley to death before escaping from his cage and killing more people including Gunnar Eversol.