From Halopedia, the Halo wiki
Paul Bertone, Jr. is a senior employee at Bungie Studios and a video game designer. Born in Bellingham, Massachusetts, he was a Paratrooper in the United States Army, and also went to school at University of North Carolina at Charlotte for engineering. During some of this time, Paul played the games Myth:TFL and Myth: 2, where he was the captain of the most prestigeous and well reknown team, Civil Order. After placing 1st in many tournaments, bert, aka ruiner, became employed by Bungie Studios circa 2000. He served on the design team for Halo: Combat Evolved, and was promoted to design lead for Halo 2. He currently still works at Bungie, where he was the lead mission designer for Halo 3. On that project, he also scripted and designed the first mission of the game. He has not yet filled out a profile on Bungie.net.