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).
May be: Helphing them make their dreams come true is what our job is all about. This is the more common way to say. Job, a singular term, can consists many tasks within.