Kaplan applied for a job as an WoW quest designer at Blizzard Entertainment. Kaplan realized that the job description was tailor-made for his background, and that his previous visit to Blizzard had been an informal job interview. On May 2002, Kaplan was officially hired at Blizzard.
He has been working on titles like Warcraft III: Reign of Chaos , the World of Warcraft Franchise and Titan (which got cancelled). In 2009, he announced that he was leaving his position as WoW game director and chose to work on Overwatch.
Jeff gained lots of praises and rewards from being the Overwatch game director. Overwatch became extremely successful. Within its first year, it had already earned more than $1 billion in revenue. Over 35 million players worldwide have been playing Overwatch ever since.