Selected in 2013 as the Power Woman of the Year, Tetchi is a pioneer in renewable energy in the Philippines. In 2006, she began her career in renewable energy as Country Director for the US-government funded rural electrification project, where her work energized 500 villages using solar home systems and micro-hydropower systems. Immediately after the implementing rules of the Renewable Energy Law became effective, she joined MEMC-SunEdison in 2011 as Country Advisor for the Philippines.