uncredited prison guard?

There is a blonde woman in the movie who plays one of the prison security staff. She sounds a bit Australian. She has not too many scenes but nevertheless has quite a screen presence and does well with the lines she's given, delivering them convincingly and with wit.

I wanted to see if there are any other shows featuring her but I cannot identify the actor. I've failed to hear the character's name and none of the female credits look like her.

Anyone? Thanks.