I work as a full-time Unix Specialist in the Infrastructure Systems group at University Information Services for the University of Cambridge. I wear several different hats, including University Postmaster.
I have resigned and will be leaving the University on 30th August 2019.
Previously, I was a full-time programmer and systems administrator for the Computing Support Group at the Department of Computing of Imperial College of Science, Technology, and Medicine — and before that, a PhD student, research assistant, and undergraduate. (See also my pages at my former Department.)
I also have a personal site.