Why only administrators, don't you think these people are also trustworthy?
They are DT members and they are trusted by other users for some reason, but the evidence may need to be published publicly rather than privately. They want to know how you work and how you solved previous cases, so you might want to consider posting some evidence instead of just your own claims.

I also advise others to be careful if they are interested in getting your services. This is so that they can minimize the possibility of fraud from someone who takes the initiative to help.