In his new role, Gaden will be responsible for all aspects of the distribution of Henderson's investment capability, across retail and institutional markets.
It is the first major Australian appointment made by Henderson since it announced it was setting up a pure funds management business earlier this year.
Gaden will have a key role in the future growth and development of Henderson within Australia.
He joins the group from his previous role at Challenger Limited where he was general manager, institutional business and strategic alliance.