Margie McCarthy is Director of Research and Policy Insights at the Sustainable Energy Authority of Ireland (SEAI). Through her work, McCarthy is at the forefront of Ireland's sustainable energy revolution and has a passion not only for solving its technical challenges, but for overcoming the social obstacles to the scale of change needed. 

For her policy changes, McCarthy chose to create a vision for Ireland in 2050, to accelerate the roll out of district heating, and to wind down fossil fuel subsidies. 

For her personal changes, McCarthy chose to buy no new dresses in 2024, and to tune in to opposing opinions.