Yes. Most companies make employment offers which are contingent on a successful background check.
However a DUI conviction should not be a show stopper unless driving is an essential part of the job. In general terms, the background check should only be a problem if it somehow relates to the job in question.
Be sure to be honest on any sort of employment application that is filled out. While DUI might not disqualify you. falsification will.
I am not aware of any company that does background checks on existing employees unless you were exploring a new position that might require different credentials. So for example if you were going into a sales position or a courier position that requires a clean driving license, they would check out your MVR to ensure it is clear of major violations.
If it's a felony DUI, license revoked, then it'll be a problem if you decide to leave Labcorp. I could be wrong, but I don't think you are required to report this - unless you were a courier or had a company car (sales rep). At worst, you might be stuck with Labcorp. It might be worth spending a few hundred dollars to get a legal opinion. Good luck.
A DUI is not a big deal unless it’s a felony DUI which you would have to disclose on application. They don’t care about a DUI in your past as long as you handled it legally, you’re fine.
No need to worry. They won’t fire you for that. You don’t drive a company car so you are not a liability for them. I know other employees at LC that have had a DUI. Just don’t get another one. Call an Uber next time you’re drinking. It’s way cheaper than a DUI.