He studied Political Science (BA) and Socio-Ecological Economics and Policy (MSc) at Goethe University Frankfurt (Main) and the Vienna University of Economics and Business. Subsequently, Leonard worked as a parliamentarian employee for the President of the Austrian National Council in Vienna.
Prior to joining the ISR Group, Leonard was a research assistant at ETH Zurich at the Natural Research Policy Group (NARP) and completed his PhD in Economic Geography (Dr. sc. nat.) at the University of Zurich.