I think you have got the site hierarchy down just fine. However, taking a look at [what I presume to be] your landing page, I think that you could improve your search position by providing more information on the page here.
Start with your company USP's, maybe include a short explainer video? Then work on your written content. Make your page better than your competitors page and you should be rewarded.
I have a site in a very competitive industry with a landing page that ranks within some huge business homepages, and our domain authority is about half of theirs! You just need to keep working on that page.
Dont be tempted to throw too many links at it either. Work on weeding out only the best links from your competitor profiles.