Asscher ya yi aiki a matsayin mai bincike a Jami'ar Amsterdam daga 1996 har zuwa 2002. An zabe shi a matsayin mai ba da shawara na Municipal na Amsterdam a ranar 8 ga Maris, 2002, ya zama shugaban majalisar na jam'iyyar Labour a majalisar gari a ranar 3 ga Afrilu, 2004. Ya yi aiki a matsayin farfesa mai ba da shawara na dokar mallakar ilimi a Jami'ar Amsterdam daga ranar 1 ga Mayu, 2002 zuwa ranar 1 ga Mayu, 2006. Asscher shi ne Lijsttrekker (dan takara mafi girma) ga jam'iyyar Labour a zaben gari na 2006 kuma ya zama mataimakin magajin gari da Alderman a ranar 26 ga Afrilu, 2006.
Shekarar 2010