Probably not before you have been offered a job. Until you've been offered a job, a boss or company can only ask questions about whether you can do the job. So they can't ask unless your HIV or AIDS makes you unable to do parts of the job. But this is true only if the law where you live covers you and the job (see the first question).

What about after I've been offered a job?
Your company or boss can make everyone take a general medical exam. As part of the exam, they can ask you what illnesses you have and what medications you take. You then have to tell them about your HIV. But they can't take the job back because of your answer as long as you can do the job safely, so don't lie. If you lie and they find out, they can take your job away for lying.

If I tell my boss or company that I have AIDS or HIV, do they have to keep it a secret?
In some states they do. In others the law isn't clear. To find out about the laws where you work, do what we said in the answers to the first set of questions. It is always a good idea, if you tell your boss or company that you have AIDS or HIV, to say that you don't want them to tell anyone else.You'll have better legal protection. And many people will respect your privacy.