At this stage, the work of the one or two content marketers on your team remains about the same as it does with a team of one -- content creation, SEO, and social media. Even if you decide to dedicate two hires to content marketing as Volpe suggests, to bifurcate responsibilities between those two employees is premature. Both employees should contribute to all three responsibilities, and leadership of the content marketing program is shared between those employees.
Regardless of team size, it's common for visual content to be created by nearly everyone except, perhaps, the SEO specialist. While designers will do the bulk of the advanced creative work, bloggers, content creators, and social media managers will all get involved in lighter-weight design. Often, designers will also create templates for the writers on the team so they can be more independent -- like creating ebook templates so premium content can be laid out by just about anyone with an InDesign license.
In some cases, the guidance or existing copy that a content writer receives from his or her client is, in a word, awful. Many are the days that I’ve sat down to look at a wall of ill-formatted, poorly spelled, stream-of-consciousness rough copy, and begin the arduous task of editing and polishing it. It’s the intellectual equivalent of cleaning up someone else’s bedroom: you just don’t want to know what goes on in there to cause such a mess. Still, we do it, and we smile, because in the end making you look and sound good is what our jobs are all about.