Never been bothered by titles like 90 percent of everyone else. If you have the respect which you obviously do then your job title is more flexible as you help in other areas and not solely in one role. The last job I had I worked in every division which gave me a full understanding so if anything was wrong it could be rectified instantly with no one knowing what to do. Most managers delegate so much it is questionable if they even know their job or even if they are capable of doing it. Large companies are definitely having to change how they operate from where thy once were 10 or even 20 years ago.
There are a couple guys in the company who are like this and have vast experience with pretty much everything. Whenever and wherever they are needed, if even for an interim while they hire someone new, they are the go-to people.