Investment banker John Wylie is adding another element to his philanthropic interests: a not-for-profit advisory group for charities.

"In the corporate sector, chairs and CEOs have people, like the independent advisory firms, they can turn to for advice. But it's really patchy in the charity sector," said Mr Wylie, who with his wife runs the John and Myriam Wylie Foundation, which was ranked 47th in The Australian Financial Review magazine's Top 50 Private Givers list.