Dr. Giannis Zacharakis is a Principal Researcher at the Institute of Electronic Structure and Laser–Foundation for Research and Technology (FORTH–IESL) and the Head of the Laboratory for Biophotonics and Molecular Imaging. He has served as the Vice President (2018–2019) and President (2019–2020) of the European Society for Molecular Imaging (ESMI), and he has served two terms as a Member of the Council of the same Society (2014–2018). He is also the elected vice-president of the board of researchers at FORTH. He received his BSc in Physics in 1997 and his PhD in Biomedical Imaging in 2002 from the University of Crete. During 2003 and 2004, he was a Research Fellow in Radiology at Harvard University, Cambridge, MA, USA. Between 2005 and 2009 he was a Research Associate at FORTH–IESL and was promoted to Research Scientist between 2009 and 2016. In 2017 he was elected to his current position. His main fields of interest are Biophotonics, Biomedical, and Optical Imaging, focusing on developing novel tools and key enabling technologies for imaging biological processes in living systems, ranging from cells to organs to whole organisms.