Sex offenders who are still on probation or parole or are actively in treatment may be required to inform their employers or potential employers as a condition of those programs. However, offenders who are not under any form of supervision or enlisted in any program are not legally required at all to inform their employer that they are listed on the sex offender registry, and there really isn’t much benefit to them in doing so anyway.
This is why it’s important for employers to be proactive in ordering these sex offender registry checks themselves if they wish to get this information before making hiring decisions. If they’re on the registry, it will be relatively easy to find them. But if you don’t check, don’t expect them to tell you during the application process.