Let me just tell you that forums are one of the worst places (after most social media sites) to look for candidates to fill high-profile executive positions, because almost nobody reading this is qualified for one.
You want to place this job position on a website, and ideally you should go to a meet-up of a Bitcoin conference and make your pitch there.
Definitely the worst which means that OP is desperate to look for one, I do not think it is even appropriate for you to look for that high position in this forum, this should only be a hub for services that are more on the low level positions. What you have recommended can definitely work, there is a lot of conferences that you can attend to if you want to expand your network although it depends on where you are from because the bitcoin scene might not be that big in your country or locality.
Nobody will ever work for those two guys; a senior engineer would immediately understand that neither of them has any idea of what they want to do. They are just copying the project they were previously working on, knowing it worked, but with the goal of scamming investors. After two years, they still have no product, no team, no clear direction, and a load of legal issues. The only thing they are good at is lying. They are not even skilled criminals, as they got recorded while attempting to extort money from their previous employer.