Rubuta ci gaba ga wannan sakin layi - Leeser yana da digiri na Bachelor of Arts (Hons.) da kuma Bachelor of Laws daga Jami'ar New South Wales. Ya zauna a Majalisar Woollahra daga 1995 zuwa 1999. A lokacin, shi ne ƙaramin ɗan majalisar da aka taɓa zaɓa a Ostiraliya. A shekarar 1999 ya yi aiki a matsayin memba na Firayim Minista John Howard na "A'a" yakin neman zabe a lokacin zaben raba gardama
Ka yi haƙuri. A shekara ta 2000, ya kasance abokin tarayya ga Mai Shari'a Ian Callinan na Babban Kotun Ostiraliya.