•Advance Energy Ltd - Gordon Sklenka has been appointed as company secretary following the resignation of Simon Lee Robertson. •Advance Healthcare Group Ltd - Ray Steedman, Adrian Loader and Malcolm Cole have been appointed as non-executive directors. Chris Denz and Alex Bajada have resigned from the board. •Advanced Ocular Systems Ltd - Tony Fitzgerald has resigned as executive chairman. Simon Carroll has been appointed as managing director and CEO due to the resignation of Ken Taylor. •Andean Resources Ltd - Barry Bolitho has been appointed as executive director. Patrick Esnouf has also taken on the role of full-time acting managing director. •AXG Mining Ltd - Peter Jermyn has resigned as chairman. •C@ Ltd - Anthony Ho has been appointed as company secretary following the resignation of Timothy Spooner. Andrew Gay, executive director and CEO, and Kevin Holland, executive director, have also resigned from the board. James Martin and Gordon Thompson have been appointed as non-executive directors and Andrew Harrison will assume the role of acting chairman. •CopperCo Ltd - Stephen Blackman has resigned as executive director. •Discovery Nickel Ltd - Scott Reid has resigned as non-executive director. Karl Schlobohm has been appointed as company secretary following the resignation of Wayne Kernaghan. •Eleckra Mines Ltd - Kevin Hart has been appointed as company secretary replacing Brett McCullagh, who has resigned. •Elemental Minerals Ltd - Patrick Flint has been appointed as company secretary following the resignation of Bruce Acutt. •Essa Australia - Dudley Kingsnorth has resigned as director and non-executive chairman. •Focus Minerals Ltd - Kazimierz Grygorcewicz has been appointed as company secretary following the resignation of Alec Pismiris. •Marine Produce Australia Ltd - Michael Firmin has resigned as non-executive director. Peter Fraser has also resigned as managing director. •Medec Ltd - Siva Rajah has been appointed as non-executive director. •Navigator Resources Ltd - Non-executive director Allan Trench has been appointed as non-executive chairman following the resignation of Barry Bolitho. John Shipp has also been appointed as a director. •Norwood Systems - Geoffrey Donohue has resigned as a director. •Pearl Healthcare Ltd - Barry Catchlove has resigned as a director. •RiTract Ltd - Bill Nicklin has been appointed as CEO. Mr Nicklin will be taking over from Rupert Northcott, who is unable to renew his three-year contract. Mr Northcott will remain on the board. •Valhalla Uranium Ltd - Greg Fitzgerald has been appointed as company secretary following the resignation of Jodi Ison.