Dooley, 25, whose unorthodox action was modelled on Jasprit Bumrah, was one of the breakout stars of last season's BBL with Hobart Hurricanes having initially played for Brisbane Heat during the 2021-22 campaign among the raft of Covid replacements.
"I'm really excited to have signed my first state contract and to be joining the Tigers next season," Dooley said. "I had a great time and learnt a lot working with Jeff and all of the players and staff at the Hurricanes last season, so it's great for me that there's also that cross over into the Tigers program in a lot of ways.
"I absolutely loved my time down in Tasmania during the Big Bash, and this year will be a completely new experience for me living as a full-time cricketer, so I can't wait to get down there and get stuck in."
Tasmania head coach Jeff Vaughan believes that Dooley could make a mark in red-ball cricket.
"Paddy has obviously found his way into domestic cricket through the white ball game, but I think he also has the potential to play all three formats for us," he said. "To have him supported in a full-time program such as ours, where he has access to all of the strength and conditioning and other training he needs outside of his cricket skills, we think will really be of benefit to him as a cricketer."