How to Bring back the Value of the top of the column

Hello Guys

I have been struggle myself trying to do a sort of (offset, Index or whatever)
What I basically need to do is return the value that is in the top of the column
Like I was doing a kind of (un-offset)


In the spreadsheet attached there is a list of people and jobs that they were on
When I chose a job number I need to bring back who was on that job, there is always more than one person in the same job

I attached the spreadsheet

Can anybody help me, please?