Maynard-Brewer joined Charlton's Under-18s in 2015 from ECU Joondalup.

The goalkeeper has worked his way through the club's junior teams and up the ranks.

Now 19, the Western Australian product was given an opporutnity last week.

Maynard-Brewer, the son of former Perth Glory CEO Jason Brewer, has been training with the first-team in the off-season.

The shot-stopper knows he has to keep working hard for more opportunities to come.

"Training with the first-team now and seeing the standard of the players, I've taken what I need to do on board," he told the club website.

"I know the level and intensity I need to be at and I'm just going to keep working towards it.

"I know as a goalkeeper I have to bide my time and, whilst biding my time, I have to keep learning and taking on board what the manager says. But it was a great feeling to make my competitive debut.

"Charlton always give goalkeepers and young players chances so if I keep working hard in training, playing well with the U23s and taking on board what the coaches say to me, especially Andy Marshall, then more opportunities will come."