Barry is a friend of Owen Grady who was once a Velociraptor trainer at Jurassic World.
In 2013, Barry was living in France. After noticing that the pack dynamic of Velociraptor was more complex than thought, his freind Owen Grady reconmended Barry to Vic Hoskins to work with the raptors.
Barry was later hired afterward as the trainer and caretaker of the project's Velociraptor pack.
Isla Nublar Incident (2015)
Barry took part in stopping an escaped Indominus Rex (I. Rex) after she had escaped her enclosure and was rampaging throughout the island. At one point in the incident, he noticed that the raptors he and Owen trained were oddly communicating. Owen also notices and realizes that the Indominus rex was also made of Velociraptor DNA, giving it the ability to communicate and become the new Alpha. Once the raptors turned on the humans, Barry ran to a nearby log and was attacked by Blue and was nearly killed by her until Owen whistled for her and she turned to chase him instead, saving Barry's life. He would later evacuate to a hanger in Costa Rica with the rest of the evacuated tourists.