Position: Unix/Linux Systems Administrator, DevOps, Release Engineer, Infrastructure Engineer
Category: DevOps
English level: upper
Years of experience: 11

It's not so easy to describe everything that I've been doing for 35 years. Most of the technology from twenty years ago has simply ceased to exist.
DNS, BIND, NSD, Exim, PostgreSQL, Postfix, pfSense, HAproxy, ElasticSearch, SaltStack, Ansible, OpenLDAP, Nagios, Zabbix, OpenStack, Nginx, Apache, FreeBSD, OpenVPN, Debian, Centos, Prometheus, Cyrus, Dovecot, pf, iptables, Wazuh, etc., etc.
Having started as a programmer, I worked as a system administrator for most of my life. In addition, I was a security officer for couple of years.
The word DevOps is used to refer to all sorts of things - which is not surprising, this is still not a profession or a role, but rather a methodology. Please, be specific.