Short answers, pulled from the story.
Jeremy Crawford worked for Wizards of the Coast from 2007, when he was hired as a Dungeons & Dragons designer, until April 2025, when he announced he was leaving. In between he served as rules manager for the 4th Edition and later as Game Director of Dungeons & Dragons in 2024.
Jeremy Crawford was Co-Lead Designer of the 5th Edition alongside Mike Mearls, and also served as lead rules developer and managing editer for the line. He is credited as one of the authors of the 5th Edition Player's Handbook, plus books including Curse of Strahd, Volo's Guide to Monsters, and Xanathar's Guide to Everything.
In April 2025, Jeremy Crawford announced he was leaving Wizards of the Coast following the release of the 2024 revised Dungeons & Dragons core rulebooks, on which he had been lead designer of the Player's Handbook.
Jeremy Crawford became Game Director of Darrington Press in June 2025, joining Critical Role Productions' tabletop imprint alongside Chris Perkins, who took the role of Creative Director, mirroring the roles the two held at Wizards of the Coast.
Jeremy Crawford is gay and married his husband, Phillip Lienau, in 2014.
Before Wizards of the Coast, Jeremy Crawford co-designed and edited Blue Rose with Steve Kenson for Green Ronin Publishing, which won two 2005 ENnie Awards for Best Rules and Best d20 Game. He also worked on the second edition of Warhammer Fantasy Roleplay and on Mutants & Masterminds.