Again....this is false. Not saying you'd have some issues with getting a job but having one DUI record isn't as bad as it seems unless you are doing a driving job like UPS or trucking. As far as corporate goes, if your credentials and work history speaks for itself, then you should be good. It just depends on the job and company and you as an employee. In my line of business (insurance), drinking is such a big thing that having a DUI isn't really a big deal. HR and companies are more concerned with other things like fraud, robbery, etc.
But...having 2 or 3 DUIs is a different story. Then you aren't reliable as an employee. I know a girl that got hired at my last job with one DUI and she got another one later and she can't get a new job for nothing.