Born and bred in Western Sydney, Hamill started playing football for his local side Chipping Norton FC before being identified for various state league and youth representative teams. 

The defender returned home to Western Sydney following stints at Melbourne Heart and K-League side Seongnam FC in 2014, making his Red & Black debut against Guangzhou Evergrande in the AFC Champions League Quarter Final in 2014. 

Hamill went on to play a key role in the club’s Champions League conquest including a number of authoritative performances before going on to impress in the A-League and FFA Cup.

Last season, Hamill was named part of the club’s captaincy group alongside veteran Mark Bridge and the now-departed Ropbbie Cornthwaite. 

He has featured in 76 matches, scoring six goals, during his five seasons at the club and Wanderers CEO John Tsatsimas said Hamill embodies what it means to be from Western Sydney.

"Brendan exhibits all the qualities that a Western Sydney Wanderers captain should," said Wanderers CEO John Tsatsimas. 

"I could not be prouder that a player born and bred in Western Sydney is leading us into this campaign. 

"His commitment and passion for the club has been quite evident over the period of time he has been a Wanderer and we look forward to seeing the rest of them, in particular the younger players, following in his lead."

Coach Markus Babbel believes Hamill is the perfect fit to lead the group for the upcoming season.
 
“Brendan is our captain because since I have come to the club he has been fantastic,” said Babbel.
 
“He’s solid at the back, he speaks well with the team and he shows all the things that I expect from our club’s captain.
 
“I’m very happy he’s doing well.”

Hamill says he's grateful for the opportunity to lead the team in season 2018/19. 

"I'm honoured to represent the people of Western Sydney, I'm honoured to represent the club," said Hamill. 
"To lead the team is a massive honour but to do it in an environment where I was born and bred is huge for me, it's huge for my family and I'm excited. 

"We've got a huge challenge ahead but I'm looking forward to it. I've got great leaders around me and we really want to attack that title this year. 

"This club is all about winning titles and chasing honours, so it's no different this year."