Jeremy Dooley, also known as Lil J, Jerem6401, or JDoolz, is a full-time Rooster Teeth employee and one of six main cast members of Achievement Hunter. Dooley formerly worked as an editor, content creator, and recurring host on Achievement Hunter for a year, beginning in July 6, 2014. He was officially promoted to "main host" by Geoff Ramsey on May 8, 2015 as of "Minecraft Episode 154: Finish this House!" At the time, it was revealed that he was the new sixth member replacing Ray Narvaez, Jr., who left the company one month earlier on April 17, 2015. This meant that his primary workload shifted from editing videos to being an on-screen personality in videos.Before being hired to Rooster Teeth, Dooley was active in the Achievement Hunter community. He had a YouTube channel called "Achievements4Idiots" where he posted videos for the Rooster Teeth community. Jeremy has a personal YouTube channel called Dooley Noted. As of October 17, 2015, he changed his gamer tag from Jerem6401 to JDoolz as he is now a main host. His gamer tag and internet persona, Jerem6401, was formerly his gamer tag in Achievement Hunter videos while he was showing up as a guest host. He still uses Jerem6401 as his official Twitter handle. When asked why he changed his gamer tag, he said that he thought the old one wasn't catchy enough. His Ask.fm account is AH_Jeremy.As for his family life, he was born in Winchester, Massachusetts on June 4, 1991. He worked at many different jobs when he was a teenager, beginning work at age 14. Karate instructor at Steven Nugent's Karate Institute, gymnastics instructor for the Burlington Rec Center, Brighams Ice Cream in the Burlington Mall, Pottery Barn in the Burlington Mall, On the Border in Woburn, Macaroni Grill in Burlington, Christian Party Rental in New Hampshire, and finally a medical company near Boston.He has often starred in the series MegaCraft on Community Hunter. He created the fan series Epic Rap Battles of Rooster Teeth.