NICTA chief executive professor Hugh Durrant-Whyte has resigned after four years as head of the organisation.
The ICT research organisation said professor Durrant-Whyte and the board had differences of opinion regarding strategy and governance of the group. NICTA went on to say it was unlikely that theses issues would be resolved.
NICTA chair Neville Stevens paid tribute to the contribution made by professor Durrant-Whyte in his time as chief executive.
"Under Hugh's leadership, NICTA has continued to grow its research excellence and is internationally recognised as one of the premier ICT research centres in the world. Equally, Hugh has made great strides in linking that research excellence with business to produce wealth for Australia."
The organisation intends to appoint Duane Zitzner, a member of NICTA's international business advisory group, as professor Durrant-Whyte's successor untill a permanent replacement is found.
NICTA said Zitzner has a wealth of experience, coupled with a deep knowledge and understanding of the organisation. He consults to leading Silicon Valley venture firms. Zitzner was previously executive vice-president at Hewlett-Packard.
Mr Zitzner has an ongoing involvement with NICTA over the last seven years in his role as a member of the group's international advisory group.
The organisation said professor Durrant-Whyte intends to remain with NICTA until early next year to assist in the transition to a new chief executive and to work with NICTA research and business leaders on ongoing projects.