The Blues have been searching for a replacement for current Academy Manager Ray Hall after he announced his intention to retire at the end of 2011/12.
Moyes told evertonfc.com: "Ray indicated a few months ago that this would be his last season at Everton so finding his replacement has been important to us.
"I am delighted that someone of the calibre of Alan Irvine has agreed to re-join the club. Once we knew Alan was available it made sense to bring him in as soon as possible and make the change quicker than expected.
"I would also like to formally welcome Alan back to Everton. He is someone who knows the club very well, we know him very well and we're all looking forward to working with him. He will bring a great deal of experience to the role."