PKI Solution Documentation
Almost every engagement I worked on resulted in my
technical authoring a combination of high and low level designs, operational guides, key signing ceremonies and integration guides.  The sample documents I've provided have been vastly redacted and anonymised.

Legacy Documentation
After reminiscing, I uploaded some
random documents I authored during the early stages of my IT career.  Some of them were in the days of DOS (pre-Windows) and before networking reached its TCP/IP nadir.  The documents are a hotchpotch, which I haven't attempted to put any formal structure around.​