Katich, who played 56 Test Matches for Australia, joined the GIANTS last year as Player Development Coordinator and match day runner.
He retired from all cricket after captaining the Perth Scorchers to the Big Bash title last summer to concentrate on a new career in the AFL.
In his new role, Katich will report to General Manager Football Graeme Allan assisting with list management, TPP, budgets and continuing to manage leadership programs. He will relinquish his role as runner.
"In just 12 months Simon has proven to be a great asset for the club and we want to continue to develop his skills and believe this is an ideal role," Allan said.
Katich said: "I'm really excited about the new role and working closely with 'Gubby' who has vast experience and knowledge of the industry."
Allan will continue to have primary responsibility for list management, with List Manager Stephen Silvagni to finish at the club after the forthcoming NAB AFL Draft.
"Stephen has helped build a very talented playing list to give this club every chance of success over the coming years," Allan said.
"This month's draft will be his fourth and he has decided this is now a good time to move on. We thank him for the important contribution he has made to help establish the GIANTS and wish him and his family all the very best."
Silvagni said: "It's been a privilege to be part of the GIANTS and work with a tremendous group of people. I have no doubt the club has a great future and I will follow its progress with interest."
The GIANTS have also announced the appointment of David Joyce as High Performance Manager.
Joyce joins the club from Western Force where he has been Head of Athletic Performance since 2012. He has extensive experience in the sports industry having worked for Blackburn Rovers, Galatasaray and Super League club Hull FC.
Allan said John Quinn, who has been on sick leave since the start of 2014, is expected to return to the club in a new role next year.
"John is a highly respected member of staff and we look forward to his return to the club after a period of absence through illness," Allan said.
