This entire post made me smile. Thank you.
DB Admins can, but are not 'obviously' on Windows.
They can, but most often do not use MSAccess.
DB Admin's is a very broad category ranging from MSAccess to NASA Aerospace 6NF ( 6th Normal Form ) for spacecraft / lander missions ( I doubt they use this today ). Still, that range puts far too much of a constraint on what a DBA can do. They most often know SQL, but this base requirement has been shifting for the last 5 years or so to more linear DB models as the world moves from 'big data' to 'fast data', with mobile pushing the paradigm shift. They have experience with Oracle, MS SQL and more currently NoSQL databases. Most importantly, they have mastered the 'magic' of creating a database scheme from a requirements document.
I have not written an SQL backend in the last 6 years or so. Everything has been NoSQL.
The pay can range from $20k/US per year to $20k/US per month depending on expertise.
Terrific answer! Fun read!
I'd say I do quite a bit of DBA type work, by way of overall system architecture, development, data science/analytics, as part of an entire system design and implementation. I'm __reasonably__ proficient with MS-SQL, Oracle, Postgres, no-SQL (document modeled like Mongo, and KVPs like Couch), that includes data modeling, optimization, in-DB coding like T-SQL/PL-SQL, but again, all that's just to develop backend stores, etc., for a whole system, because I do the front/middle tier coding as well.
While you might run a single, small organization (like a church) on Access, with maybe some Excel sheets for simplified data entry/export (for external manipulation), when we talk of a DBA, it's more of a large scale, dedicated role with expertise as outlined by the post above.
In modern dev shops, talking service companies who design/build/develop for other organizations, there tends not to be dedicated DBA type role, it's more like me, high proficiency in designing what's needed for the entire scope of the project. Dedicated DBA roles tend to be more in the enterprise space, and/or where there's a very specialized role.
Hahaha, though in that enterprise type capacity, some of the formal DBAs (because, wow, they like to put certs in their sigs ...) I deal with at the Federal level, I wouldn't hire, even if it meant closing shop, and bagging groceries.
I guess I'd ask this: are you looking to fill an existing role? Looking for a new opportunity to capitalize on an existing skill set? Looking to learn and trying to understand the market viability of those skills?
BTW, I do all my development on a Mac, some on the same Mac though a Win10 VM (Parallels).