McInnes will start his new role when he returns from the West Indies, where he is on tour with the Australian men's team, in mid-July.
His initial task will be to prepare the Southern Stars for their defence of the ICC Women's World Cup, which takes place in Australia in March 2009.
"There's been a strong skill focus on the women's game for a long time and I think there's a chance to move toward more tactical, game awareness development, so that's something I'll investigate initially," McInnes added.