I design and prototype unix-based network services infrastructure, data center design, etc. in the telecom context i.e. no microsoft machines allowed.
Areas of focus are security (PKI, LDAP, firewalls, etc), DNS, just to name a few. I was a senior UNIX admin already 20 years ago and nowadays I just prototype the types of systems that most people can not fully understand, then I train them how to use it and hand it over to them for maintenance and operations. Basically, I choose what I do and set my own schedule.
Areas of focus are security (PKI, LDAP, firewalls, etc), DNS, just to name a few. I was a senior UNIX admin already 20 years ago and nowadays I just prototype the types of systems that most people can not fully understand, then I train them how to use it and hand it over to them for maintenance and operations. Basically, I choose what I do and set my own schedule.