I'm an IBM mainframe specialist, with a worldwide job role. I'm primarily focused on mainframe performance and capacity, but I have a keen interest in how customers use mainframes.
For this audience, though, I'm a tool user - currently Omnifocus, Omnioutliner and Omnigraffle. I use Omnipresence wherever possible. Also iCloud and Dropbox as necessary.
My primary devices are Apple Watch, large iPhone, large iPad Pro.
I'm a programmer at heart, so things like Taskpaper, Editorial, Pythonista and Workflow come naturally to me.