Treasure – who was appointed managing director for Australia in 2009 - will take overall responsibility for HRG’s operations in China, Hong Kong and Singapore.
He will continue to take charge of the day-to-day management of HRG Australia.
Treasure said: "I look forward to working with the entire Asia Pacific team in delivering a seamless service to HRG’s impressive portfolio of clients, and to creating new opportunities across the region for our partners and staff. We already have a strong regional platform and I look forward to developing it further to bring additional benefits to our clients and suppliers."
He started his career with HRG in 2006 as the general manager for Hong Kong.
HRG’s chief operating officer Kevin Ruffles said: "Throughout his four years with HRG, Greg has been instrumental in leading a number of successful initiatives in Hong Kong and Australia and I have no doubt that he will bring this expertise to the other countries in the region. This promotion is an acknowledgement of his extensive operations experience, his impressive proven track record within the company and most of all the respect he has gained from our clients."