Prior to joining RMIT in 2009, Professor Posso worked as a consultant for ACIL Tasman, one of Australia's largest professional economic consultancies. Since joining the university Professor Posso has collaborated extensively with government and international organisations.
He has authored economic consulting and research reports for governments, NGOs, and international organisations. He has written reports for the Australian and Peruvian governments, APEC Secretariat, UN ESCAP, UN Global Compact, FAO, the Fred Hollows Foundation, Plan International, and Oxfam, to name a few.