The speaking and conference buyer
Your other market, and a separate one. Association conferences, industry summits, executive offsites and internal leadership events each have someone who owns the program and the date, and that person is almost never the one who buys advisory work. Stated plainly: this group is not enumerated in any public register, which is exactly why it stays underworked by everyone.
Who signs: conference program chair, association education director, internal events or learning lead, chief of staff.