It depends what you mean by “vetted”. For example a DBS check takes time to organise so you would be offered a job, subject to this being done, and by the time records are being checked a conviction may well show up. Also a DBS check could show a pending prosecution.
If it is a simple “has this person got a criminal record” check for an ordinary job you might get that done before it gets entered on your record, but if you are asked that question after your court date, and you lie hoping it has not got on to your record then you might face dismissal for not revealing it.
Would your job involve driving? What about the risk of it being reported in the papers any your employer finding out that way?