This is actually a good thing. I've been doing this particular job unofficially for the past two years, and now they want to make it official ... but I have to go through the rigamarole of applying. I need to write a cover letter and everything. I have been with this company for thirteen years ... how the heck do I write a cover letter for this circumstance? Just highlight my accomplishments in my current (unofficial) position, as well as all the awesomeness I've contributed to the company during my whole tenure here? Do I talk about my plans and goals for the future of the company? I DO NOT KNOW.