Matthew Kuperus HeunMatthew Kuperus Heun has been an engineering professor at Calvin College since 2002. Matt earned an MS and a PhD from the University of Illinois at Urbana-Champaign and later worked at NASA's Jet Propulsion Laboratory (JPL) and at Global Aerospace Coporation (GAC). He has been a visiting scholar at the Centre for Renewable and Sustainable Energy Studies at the University of Stellenbosch, South Africa. He started Calvin's green revolving fund in 2009 and managed it for a decade. His current work includes societal exergy analysis, Energy Return on Investment (EROI), and energy-sustainability interactions in developing world contexts. His interests are summarized by the question What is the relationship between energy and the economy when viewed through the lens of sustainability? Read More Read Less