helping them make their dreams come true is what our jobs ar

helping them make their dreams come true（主语） is （系动词）what our jobs are all about（表语从句）.
表语从句是个完整的句子,是主系表结构,are就是其系动词.疑问词what是about的介词宾语,做从句引导词时放在最前面.正确语序是：
our jobs（主语）are（系动词）all about what(表语）.