Please relax. Although the results read High (as you say), they are all non-reactive. That means to say that you are non-reactive to the HIV
antigen and that you have tested negative for HIV infection.
Please do not worry about the high titers as long as they are non-reactive. You are healthy and fine as of now. Go ahead with your employment offer.
You may repeat the same test after 6 months.
All the best to you.