EAs & PAs can effectively manage their event responsibilities by outsourcing some of the time-consuming and often technical or specialist tasks involved in a professional event. For more information, please contact. For more information, please contact. Corporate Challenge Events 1/12 Macro Ct Rowville, Melbourne, VIC 3178, Phone: 03 9753 2562, Fax: 03 9763 6880, Web: https://www.corporatechallenge.com.au