It is said that he is looking for a new job,one where he can

这个句子有one没有one都是对的,但是句型不同,成分不同.
It is said that he is looking for a new job,one where he can get money.
这里有one的,是一个同位语从句,a new job = one ,从句中where再引导定语从句修饰one.
It is said that he is looking for a new job,where he can get money.
这里没有one,是一个非限制性定语从句,直接修饰先行词a new job.