Am I allowed to have a Licensed Private Investigator present at a deposition as a witness?

In a nutshell, I am in Florida. My ex had his attorneys send me a notice that I had to appear at a deposition - to be given by him - at their office. (Now I know he cannot himself LEGALLY take the deposition - he has no legal authorization to do so.) The goal of this is to obtain financial information about me. This will be done in front of a court reporter or Notary Public, him and his attorneys. Seeing as he gets off on outnumbering, bullying and trying to intimidate me (this has been going on for years), am I allowed to bring someone as a witness in case of anything unscrupulous? I do not have an attorney - I cannot afford one. The person I wish to bring with me however is a colleague and Licensed Private Investigator. Is this allowed?