It is ability to do the job that matters ,not where you come

重要的是工作能力,而不是户籍或职业.
提问者补充提问,that不做成分,没有意思,它是构成it强调句的手段（句型是It is...that...,如It is you that I like.我喜欢的是你).
这句话等于说What matters is ability to do the job,not where you come from or what you are.其中matter是不及物动词,意为be important.
——【译苦思甜】团队成员荣誉回答