If you wish to tell other people that you are working with a statistical consultant, that is entirely your prerogative.
Confidentiality and Privacy
Having a great deal of experience with IRBs, I greatly understand the importance of keeping data confidential. All data sets that I receive in my work as a statistical consultant are kept on an encrypted hard drive, so even if my computer was to be lost or stolen, you can be assured that your data will be kept confidential.
I realize that some of my clients prefer to keep the fact that they have a statistical consultant working for them confidential. As a strict rule, I never release information regarding who I work for or what projects I am working on to anyone unless I have your express permission. If you wish to tell other people that you are working with a statistical consultant, that is entirely your prerogative.