(Born 17 April 1948) is an experimental particle physicist working at CERN. He is best known as one of the “founding fathers” of the ATLAS experiment at the CERN Large Hadron Collider together with a few other colleagues. He acted as spokesperson (project leader) of the ATLAS Collaboration until 2009.[Jenni was directly involved in the experimental work leading to the discoveries of the W and Z bosons in the 1980s and the Higgs boson in 2012.He is (co-)author of about 550 publications in scientific journals.Peter Jenni is frequently invited to give public lectures on experimental particle physics at the LHC. Jenni is well known for his efforts to involve also physicists from countries that are not CERN member states in the construction of the ATLAS experiment. As a Spokesperson he frequently interacted with scientists from all five continents as well as with many funding agencies and science authorities. Thanks to his efforts many universities and institutes from a wide variety of countries became members of the ATLAS Collaboration making it a truly international experiment. He often says that the biggest reward for him is to see how enthusiastic and motivated young people are about physics and he constantly tries to help future generations to get the same or even more opportunities in high energy physics. It is in this spirit that he, together with his ATLAS co-laureat of the Special Fundamental Physics Prize, Fabiola Gianotti, donated all prize money for educational and humanitarian purposes, and created the ATLAS PhD Award sponsoring PhD students.