Petter Matthews is a senior international development and built environment specialist with over thirty years’ experience. He is the Executive Director of the Construction Sector Transparency (CoST) which currently works in 17 countries to promote transparency and accountability in public sector infrastructure investment. He is also Executive Director of Engineers Against Poverty, an independent NGO that works with government, industry and civil society to fight poverty and promote sustainable development. His early career involved periods as a building sub-contractor and construction manager. He has worked for Government, international agencies and NGOs in many parts of Africa, Asia and Oceania.