Webmaster
My first web-related title, back in 1996, was "Content Webmaster" at Investors Bank and Trust.
Now webmaster is somewhat dated and vague as a title, but important nonetheless. It's the name of a whole suite of tools that Google provides for not just SEO, but a lot of what's important in site building, content management, link checking etc. 'webmaster' should be regarded like 'master electrician' or 'master plumber'.