So, I started my current job last year with the snappy title of "Helpdesk Administrator", my role being to run the company's IT helpdesk. Since then, I've become involved with projects, managing pretty much all the servers, managing various support contracts, still running the helpdesk, etc. Now though, our IT manager has left and there's no immediate plans to replace him (although it will happen eventually). I have been given a pay rise due to even more responsibilities, and the opportunity to nominate a new job title for myself!
So, any idea? Sort of like an upper-level jack-of-all trades that pretty much manages/supports most of the infrastructure for a business with 140 IT users? Unfortunately, someone else already has the title of Assbox Administrator, so that one's off the table :-(
Not to be sillly, but how about "Systems Administrator". I know it's not exactly creative, but it's a senior role and seems to cover exactly what you do. "Senior Systems Administrator" if you can get way with it!
Sounds like you're the IT Manager.
I'd go with sys admin, echoing other's thoughts.
However, depending on how much you respect your users, how about muppet wrangler?
To me, IT Manager implies a role consisting primarily of people / services management. Systems Administrator implies more involvement and oversee in the technical delivery.
Which is one "best" probably depends more upon what Dave wants to be seen as and where he wants to go in future.