The Broncos announced the decision to make Parker captain on Friday at their Red Hill headquarters, just six days out from their Round 1 clash against Parramatta.
In his 17th season at the club, Parker will now officially take over from the retired Justin Hodges as he looks to guide the side to their first premiership since 2006.
A co-captain with Hodges in 2014, Parker says taking sole responsibility of the job is one of the greatest feelings he has ever had as a player.
"It is the greatest honour of my career. It is top of the tree," Parker said.