Sanji Mmasenono Monageng (an haife ta a ranar 9 ga watan Agustan 1950) ta kasance alkali na kotun hukunta manyan laifuka ta duniya (ICC) tun daga shekarar 2009. Monageng 'yar ƙasar Botswana ce. Ta zama alkali a Botswana a 1989.A cikin 2003, an zaɓi Monageng a matsayin kwamishina a hukumar kare haƙƙin ɗan adam da jama'ar Afirka, wadda wata ƙungiya ce ta Tarayyar Afirka. A watan Nuwamba 2006, ta halarci taron na Yogyakarta Principles da aka gudanar a Jami'ar Gadjah Mada. A shekarar 2007 ta zama shugabar hukumar. A shekara ta 2009, Majalisar Jam'iyun Jihohi ta Kotun ta zaɓi Monageng a matsayin alkali na kotun ICC.Zamanta na shekara tara wanda ba a sabunta shi zai ƙare a cikin 2018. Lokacin da aka zabe Monageng zuwa kotun ICC a shekara ta 2009, an sanya ta zama a Zauren Kotun Gabatarwar Shari'a. Mongaeng ta ci gaba da zama a cikin Zauren Kotun Gabatarwar Shari'a tun kafin 2012. Bayan ta yi aiki a cikin Zauren Kotun Gabatarwar Shari'a, Monageng ta fara aiki a sashin daukaka kara a 2012. An kara mata girma zuwa shugaban sashin daukaka kara a 2014.