You and your freelance lawyer. Lawyers listed on this site work directly for you. Your freelance lawyer is your independent contractor governed by an agreement you two decide.
You and OSC. OSC is not a party to any relationship involving legal services.
You and the OSC Managing Attorney. The Managing Attorney is available to support you and your freelancer should you require it. He is a party to the provision of legal service in the way your secretary would be. When he performs legal services he is acting as a freelance lawyer, OSC does not have clients.