Fabby Tumiwa is the Executive Director and an energy transition strategist. He was a founding member of IESR in 2006 and leading the institution since its establishment.

For more than 20 years, Fabby Tumiwa has worked on a wide range of energy policies and regulations. He is an advocate for renewable energy. He advises Indonesian government agencies, businesses, non-governmental organizations (NGOs), and multilateral development organizations on electricity regulation, renewable energy policy, energy efficiency policy, and climate change policy. From 2006 to 2017, he served as Indonesia’s delegate to climate change negotiations, as a member of the National Council on Climate Change Working Groups from 2009 to 2014, and as a member of the Indonesia Climate Change Trust Fund (ICCTF) Steering Committee from 2015 to 2019.

Fabby Tumiwa was one of the founders of the Indonesia Solar Energy Association (ISEA) in 2016 and served as its Chairman in 2021. He was a member of the Indonesia Energy Efficiency and Energy Conservation Society’s executive committee on institutional cooperation. From 2011 to 2015, he served on the Extractive Industries Transparency Initiative (EITI) Steering Committee.

Fabby Tumiwa was a LEAD Fellow in 2007 and an Eisenhower Fellow in 2009. By 2021, Fabby is a member of GoJek Indonesia’s Sustainable Advisory Council, as well as an advisory board member of the Indonesia Energy Transition Partnership (ETP). In 2023, he was appointed to the High-Level Consultative Group (HLCG) of the Energy Transition Accelerator an initiative by the US State Department, the Rockefeller Foundation, and the Bezos Earth Fund.

Fabby studied Electronic Engineering at Satya Wacana Christian University. Afterwards, he studied Extractive Industries Governance at Central European University and Energy and Climate Policy at Tufts University’s Fletcher School.