Ad Sales For Radio Station

We have 3 online radio stations and are looking to run commercials on each of them. We've been online several years and have many loyal listeners. Our stations can be heard from any computer or mobile device. We hope to use the money from the ads to develop an app. We need someone to seek advertisers willing to purchase slots on our stations. We're thinking good leads would be record companies, car companies, food companies, online schools, etc. Our audience varies from 13-24 mostly males to 35-55 mostly women at work depending on the station, so there's a large pool to pick from when it comes to targeting. We can discuss ad rates, production, impressions etc at a later date once the right person is chosen. The main focus is finding someone who is capable and experienced with sales, marketing, and lead generations. We can pay per lead or a flat rate to produce a certain amount of advertisers. ***Not just limited to audio ads, banner ads are acceptable as well