Anyone you choose can be your Trustee. Likewise, almost anyone can be Executor in your Will. Both the positions are considered fiduciary roles and come with fiduciary obligations. Certain standards apply to the conduct of a fiduciary. Generally they must conduct the affairs of the estate or trust as a prudent businessman would do. Both positions require a certain professionalism but an executor needs only a minimum of financial expertise, a trustee, on the other hand, may need quite a bit of knowledge of investing, as the position can exist longer and with less statutory guidance. In short, it is often more efficient that an attorney handle such matters, but it matters whom you choose!