Work in progress.
I am a developer with my company. I like to learn new things so I snooped at our SQL Server instance. In no time I ended being the 'go to' person for it and now am a de-facto DBA. My job is still 110% dev, DBA duties are the extra percents left...
I am a sysadmin with my IT department. I was asked to take care of the SQL Server instance installed to serve the management reports. I read some things about SQL Server administration and I'm not keeping an eye on it. I wish I could use cron jobs.
I am a PowerPivot wizard. My buddy helped my create this daily job that imports the sales into my own database. I installed the SQL Server myself.