Medicine has advanced to the point HIV is no longer a death sentence and you can live a pretty much full lifespan granted you take your anti-retroviral medication.
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You are under no obligation to disclose your HIV status to your employers and I believe jobs can't discriminate against you on the basis of your status either. There are exceptions of course depending on the nature of the job but it's mostly the health department that needs to be informed in the case of someone being positive.