By way of a general answer: If you can lawfully carry in your truck and walking around in public, then you should be able to carry on the job. However, your employer might have a no-carry policy. You can ask. Many here would advise that if there is no published policy, carry without asking. Personally, I would want to know my employer's feelings on the subject before he saw me carrying.
For more specific answers regarding KY law, post on the KY forum. It can be found the the States section of the main index.