Gary Zieff Keywords renewable energy power purchase agreements energy financing solar PV Read more about Gary Zieff Gary Zieff is an accomplished renewable energy expert with over 18 years’ experience in emerging and established energy markets. He is currently based in Viet Nam serving as Principal Energy Advisor with USAID’s Viet Nam Low Emission Energy Program. He works with GVN on the DPPA policy design, pilot program implementation and private sector investors supporting access to financing and development expertise. Gary brings cross-functional development experience to V-LEEP through prior work in the US, Caribbean, East Africa, and Eastern Europe.