Mr Gillard, who joined Aspen as its founding chairman in 2001, said the time was right for him to exit the role after having steered the company through the global financial crisis.
“It has been both a rewarding and challenging decade as chairman of Aspen Group,” Mr Gillard said in a statement,
“I am pleased to be able to step aside with the knowledge that Aspen has a stable platform on which it can forge ahead, as demonstrated by our sound FY11 financial result.”
Mr Zipfinger was previously chairman of the board at Malleson Stephen Jaques in Sydney, and is currently a non-executive director of ASX-listed Galileo Japan Trust.
Mr Gillard has agreed to remain with Aspen as a non-executive director until a suitable replacement is found.
The AGM will be held on November 28.