A Broncos spokesperson said the club signed Kennedy to add more depth the their forward rotation.

"He joins the Broncos effective immediately after being released by the Rabbitohs to take up a deal that will run through until the end of the 2020 season," they said.

Kennedy said he made the move to increase his opportunity of playing NRL.

"I saw a better long-term opportunity at Brisbane," he said. "The manager deals with the process, but the Broncos showed some interest in me.

"I looked at my long-term options, went over it with my manager, and it looked like a better fit for me."

Kennedy was previously coached by current Broncos' coach, Anthony Seibold.

"I know Seibs (Anthony Seibold), I've been coached by him, so I know the system he runs," he said. "There's players there that I've played with before, and Brisbane are one of the most prestigious clubs in the NRL.

"All those factors played a part in my decision."

The move marks another step in Kennedy's long journey in rugby league. Despite being only 24 years of age, Kennedy has now been on the list of five different NRL clubs.

He signed a contract with the Melbourne Storm at just 17, before moving to the Canberra Raiders in 2014.

He then spent time with the Dragons and Rabbitohs, before ending up at the Broncos.

He found the most success at the Rabbitohs, playing two games in the NRL against the Gold Coast Titans and Penrith Panthers this season.

"Some people have been lucky to stay at the same club, but sometimes that's what you've got to do (move around)," Kennedy said. "It's been tough having to move to different places, but it's shaped who I am as a person, so I don't regret it at all."

Kennedy will play with the Redcliffe Dolphins in the Queensland Cup this weekend, and is looking forward to putting his best foot forward.

"I'll need to work my way into the Broncos side, but if I get the opportunity to play there (Suncorp Stadium), it'd be pretty amazing," he said. "I've just got to bide my time first, and make sure I play well this weekend to get myself on the front foot."

Kennedy said his family were "a bit disappointed I'm moving further away", but understood what it took to make it in the NRL.

"I'm at that point where I don't want to be left in the same position I've been in in the past," he said. "I've learnt from my past experience, and you have to make the move early."