Complex sentence: He has been the general secretary of UEFA since 2009 and was elected president of FIFA during the 2016 FIFA Extraordinary Congress on 26 February 2016, which was held with the purpose of reforming FIFA.
Split into simpler sentences: He has been the general secretary of UEFA since 2009. He was elected as FIFA president during the 2016 FIFA Extraordinary Congress on 26 February 2016 which was held with the purpose of reforming FIFA.