You can do the SEO job on your own if you want to.

Search Engine Optimization is a laborious and very tedious task, and with time anyone can learn the basic techniques mentioned on the other pages of this site.

If you would like to take on the task of SEO you should be aware that you will need to learn those HTML tags mentioned above, you will also need to learn about keyword research and analysis, and of course how to use the SEO tools that Google freely provides. For the first several months you should also realistically plan to spend at least 10 hours every month managing your efforts until your understanding of SEO techniques are developed.

However, don't be fooled into thinking you can accomplish as good of a job with your own SEO work than that of a professional SEO agency. SEO techniques change MONTHLY. Unless you commit full time study to learning what's new every month you will never be as good as the SEO Pros.

If you can't do it yourself, and you still want to keep the work in house, hire a full time employee.