Luis F. Zarzalejo received his PhD in Atomic Physics and Renewable Energy from the Complutense University of Madrid in 2005. In February 1994, he joined CIEMAT (the Spanish National Centre for Energy and Environment Research), working in the Passive Solar Systems Unit until 2000; since 2001, he has developed his activity within the Solar Characterization and Measurement Group, which he currently leads. During 2006-2010, he was co-responsible for the Solar Resources Assessment activities at CIESOL (www.ciesol.es; joint research establishment dependent on the University of Almería and PSA-CIEMAT). In 2007, he was a co-founding partner of the technology-based company IrSOLaV. Since 2012, he has been a member of the board of AEDES (the Spanish Association of Solar Energy).