Semantic markup or Not ?

Your markup looks ok, I'm not sure about your class names mainly because you don't have any CSS in your example.

Here are a few things to keep in mind about your class names:

• The primary purpose of a class name is to be a hook for CSS and JavaScript. If you don’t need to add presentation and behavior to your web documents, then you probably don’t need classes in your HTML.

• Class names impart little or no useful semantic information to machines

• Class names should communicate useful information to developers.

source: http://nicolasgallagher.com/about-html-semantics-front-end-architecture/

James Barnett i would assume since he stated has only done the HTML then the classes are there ready for when he moves onto the CSS. I think there are too many div's still for semantic markup things like main-section and work etc could use the section tag and then further break down content inside each section with article tags.

Master the usage of the

<article>

tag, it may get confusing when you start nesting article tags within article tags but they are important to tell machines what the "meat" of a webpage is.