Job Posting Blast

We need our job posting blasted to popular job boards (Indeed, Simply Hired, Monster, etc.) and social media platforms (Facebook, Twitter, Instagram). It's a volunteer position for a future podcast in the works. The posting is also specific to a major city in Maryland (USA). The job description has already been drafted. We currently don't have a social media account/presence. That where you come in. When responding, please provide high level details about how you'll execute this task for satisfaction. As a reminder, there are two objects: Blasting the volunteer job ad to free classified sites and social media.