Customizable Title Tags for Individual Website Pages

Currently my website uses generic category title tags for individual posts. ([login to view URL]) My website is a customized "FMyScript" content management system. I want to be able to customize the title tag for individual posts in my administration panel to reflect the content of each post for SEO purposes. The freelancer will need to create this functionality. For example, I would like an individual posts title tag to read "Dear Dad | The Open Mailbox" or "An Open Letter to My Father | The Open Mailbox" .... while currently the title tag for ALL posts in a given category is "Personal_Letters - The Open Mailbox" or "Funny_Letters - The Open Mailbox"