11th – 15th October 2021- Technical University of Kenya , School of Physics and Earth Sciences, Nairobi, Kenya - The school aims at introducing ab initio calculations and molecular dynamics simulation to researchers and postgraduate students of different disciplines, using the SIESTA code. Electronic structure codes have become mature enough to be used by scientists not trained in the development of the methodsthemselves. This is a shift away from traditional practice, in which the know-how and the right to use the code was acquired through a long internship. Nowadays, most codes are distributed with very light licensing restrictions. While this ease of access is in principle a good thing, it carries the risk of uncritical or poor use of the codes by untrained people.