About 2 years ago my job migrated into something different and I trained a new person to do what I was doing. I started and I started doing reporting, etc for my group. However, what I was doing didn't actually exist as an official position and the thought was it was still developing so it would be difficult to go to HR and ask for a new title. We finally took a suggested title to HR and I recently 'officially' got my new title. How do I put it on my resume? Do I artificially cut off the end date of my last role to about when I transferred jobs? If so, my work record won't match what I have on my resume if a company calls my current office to inquire.
Suggestions? Is there an official way to indicate you were doing 2 jobs concurrently?