"Obviously I went out to the States for the experience and to keep developing as a coach but when this opportunity came up to join Birmingham, it was something which I was so happy for," he told the club's YouTube channel. "I was excited, happy to be back coaching in England, I'm looking forward to it.
"It's a massive club and it's clear what the owners'ambitions are and how the club want to move forward. It's a huge story and this could be one of the biggest stories in football over the next few years. I want to be involved in that, I want to be part of trying to bring success back to this football club."