•Alto Energy International Ltd - Katrina Grose has been appointed as company secretary following the resignation of Nadine Donovan. •IM Medical Ltd - Lincoln Tong has resigned as company secretary and chief financial officer. •Integrated Group Ltd - HBF CEO Michael Gurry has been appointed as a non-executive director. Dion Smith has resigned from the board. •Intrepid Mines Ltd - Ian McDonald has resigned as a non-executive director. •Macmahon Holdings Ltd - David Humann has retired as a director. •Mount Burgess Mining NL - Allan Mulligan and Giles (Rod) Dale have been appointed as non-executive directors. Martin Spence has resigned as director of exploration. •North Australian Diamonds Ltd - Evans & Tate chairman John Hopkins and Ian Tregoning have been appointed as non-executive directors. •Olea Australis Ltd - Stephen Rohde has been appointed as company secretary following the resignation of Keith Gray. •Traka Resources Ltd - Peter Ruttledge has been appointed as company secretary following the resignation of Desmond Kelly. •Valhalla Uranium Ltd - Peter Sullivan, Peter Huston and Henry Price have resigned as directors. •XState Resources Ltd (formerly Oriental Crystal (International) Ltd) - Douglas Wood has been appointed as a director following the resignations of Anthony Crimmins, Michael Taverner and David Roche.