Kostas Nikolopoulos obtained his Ph.D. on the ATLAS experiment with the University of Athens (Greece) in 2010. His thesis was awarded Marc Virchaux Prize. Subsequently, he joined the Brookhaven National Laboratory (USA) as a post-doctoral research associate, and since 2012 he joined the University of Birmingham as a Birmingham Fellow
Since October 2010, he is leading the ATLAS H→ZZ group, consisting of approximately 100 physicists working in the search for the Higgs boson in the decay channels involving Z bosons. His term of office was exceptionally extended for an additional year in October 2011.