Kammala jumla mai zuwa: A Wasannin Olympics na 1996 a Atlanta, Ndjissipou ya fadada ci gaba da gudu da filin wasa ta hanyar yin gasa a cikin
tseren marathon na maza. Kodayake bai taɓa fuskantar tseren hanya a fagen duniya ba, Ndjissipou ya sami nasarar da'awar matsayi na casa'in da bakwai cikin nasara a cikin babban filin 'yan wasa ɗari tare da lokacin 2: 35:55.