Several methods exist, for recruiting technical conference facilitators. It is important to remember that, in most cases, you have to get folks who have other full-time jobs to serve as conference facilitators. If, for instance, it is a conference on emerging programming technologies, you have to get folks who normally work as programmers to work as facilitators. That can be tricky.
The first method for recruiting technical conference facilitators would be through face to face meetings. You can visit the targeted conference facilitators in their offices, and try to talk them into agreeing to be facilitators for your particular conference.
The second method for recruiting technical conference facilitators would be through the phone. You can make phone calls, and make offers to the targeted conference facilitators, for them to take part in the conference you happen to be organizing.
The third method for recruiting technical conference facilitators would be through email. To get started in this aspect, you can set up a Ymail.com webmail address, at the popular Ymail sign up page, and then use that email to send invitation emails to the targeted conference facilitators. Then, you can have a back to forth correspondence with the conference facilitators, till you finally reach an agreement on the whole thing.