AET was founded by successful renewable energy power plant developers. AET's principals were the founders and executive managers of the Asia Biogas Group of companies. Founded in 1998, the principals developed the largest biogas project development company in the Southeast Asian region, with nearly 90 biogas plants designed, engineered, financed, constructed, commissioned and operated throughout the region. These projects include the world's two largest biogas plants combined output of 325,000-m3 biogas per day) and several of the region's Clean Development Mechanism (CDM) projects.  The team oversaw the development of nearly 50 approved carbon projects by the UNFCCC, one of the largest carbon portfolios in the region. 

During the last three years, the three principals of AET began to develop projects in the biomass gasification energy sector.  Principally, working off non-conventional biomass fuels such as coco husk and empty fruit bunch (EFB), the team designed fully integrated waste heat/energy recovery systems with feed preparation systems to work off high moisture content ag-residues.