YONG PING QUEN is a Technical Director & Co-Partner of Building System and Diagnostics Pte Ltd and has more than 15 years of experience in the advisory of energy and environmentally efficient green buildings. He is personally involved in more than 400 large developments in Singapore, Malaysia, China, Indonesia, and India, many of these targeted Energy and Environmentally sustainable awards such as Green Mark, LEED and GBI certifications. Other than new buildings, Ping Quen also specialises in the energy reviews and energy optimisation of existing buildings.