Josh Mosqueira got his start designing games in 1996 as a writer for White Wolf, when he co-wrote Constantinople by Night and Montreal by Night while serving in the Canadian army and finishing university. Mosqueira, Phil Boulle, and Stephane Brochu designed the Tribe 8 (1998) swords-and-sorcery post-apocalyptic fantasy role-playing game for Dream Pod 9.
Josh Mosqueira has also worked in the video game industry, including time at Relic, Vicarious Visions and Dream Mechanics, and time teaching and working as a freelance writer and designer. Mosqueira was the lead designer on the game Company of Heroes. For his work on Company of Heroes: Opposing Fronts, he was cited with an Elan Award for Outstanding innovation in gaming in 2008. He worked on Warhammer 40,000: Dawn of War. He worked at Ubisoft for just over two and a half years as creative director, working on Far Cry 3. He joined Blizzard Entertainment in May 2011. He was made the lead designer for the console version of Diablo III, and in June 2013 became the game director for Diablo III on all platforms. In 2016, he left Blizzard Entertainment.
- Mosqueira, Josh (June 5, 2013). "Messages From Hell: The Future of Diablo III". Blizzard Entertainment.
- Shannon Appelcline (2011). Designers & Dragons. Mongoose Publishing. p. 273. ISBN 978-1-907702-58-7.
- Webber, Rachel (June 6, 2013). "Josh Mosqueira appointed as Diablo III game director". Gameindustry.biz. Retrieved July 4, 2016.
- Scott, Ryan (July 2006). "Company of Heroes: Dawn of (World) War (II)". Computer Gaming World (264).
- Zacharias, Yvonne (2008-02-18). "Mass Effect dominates as game of the year: Science fiction video, made by Edmonton company, cleans up at Elan Awards". The Vancouver Sun. p. D1.
- Carlson, Patrick (June 7, 2013). "Diablo 3 gets a new game director". PC Gamer. Retrieved July 4, 2016.
- Schreier, Jason (2012-01-10). "Blizzard: Diablo III Is Coming To Consoles". Wired. Retrieved 2012-01-11.
- McWhertor, Michael (July 1, 2016). "Blizzard hiring new game director for unannounced Diablo project". Polygon. Vox Media. Retrieved July 2, 2016.