I have no idea how things are done in Pennsylvania, but I have coordinated and run job fairs in Iowa and Texas, and we charged the employers pretty hefty fees for a booth and had GREAT successes at all of them. And most of the jobs were in high tech, sales, call centers, gaming, insurance and finance. Far fewer were in labor, food service, security and the like. If I had to guess, the average wage was about $15 an hour, and that was 10 to 20 years ago. YMMV.
Tech is big and growing in Detroit and all around southern Michigan these days. Its good but Rick Snyder has been so fixated on attracting tech jobs that he’s ignored manufacturing.