Ray Reu has worked for Industrial Technology Research Institute as an engineer since 1988. He created first Life Cycle Assessment software (DoITPro Model) in 1999, and promoted the activities of LCA and Carbon Footprint thereafter. Under the funding of EPA, he created an Index and Analysis System for National Resource Circulation by integrate databases from different Ministries and Agencies in 2015. Also, he has conducted planning of low carbon cities for years.