Are you asking because your in a position to influence his employment there or what? Are you asking whether you should get this guy sacked? I can so no other logical conclusion to the situation as you are presenting to us. Reasoning:-
1.You can't stand the guy,but work together,you can't do anything about him working there,obvious conclusion,continue as you are,nothing to help here.
2.You can't stand the guy,but work together,you can do something (influence sacking,sabotage,maliza him e.t.c)about him working there,obvious conclusion,should i do something?
If so,chunga sana.
Ninajua Yote!
Ras Kienyeji Man