I´ve been working for more than 9 years in the IT world focusing in:
✅ Linux (Debian, Centos, RHEL), Solaris and Windows administration.
✅ Setting up Backups and different services.
✅ Configurating, mantaining and deploying monitoring with Zabbix and icinga.
✅ Creating and maintaning some webs.
✅ Deploying docker and linux containers(LXC).
✅ Working with MySQL and MS SQL databases.
✅ Administration of VMware Server (ESXI) and Proxmox.
✅ Setting up Policies and management of Active Directory and OpenLDAP.
✅ Management of file servers like Samba, Proftpd, FileZilla FTP, nfs shares.
✅ Monitoring and alerting with Prometheus, instana, kibana, grafana, lenses.
✅ CI/CD by using Jenkins, helm, docker, fortanix, akamai.
✅ Working with repos like bitbucket and GitHub.
✅ Cloud computing such as AWS, Kubernetes,
✅ Working in scrum and kanban using Jira.
And a few more things in IT administration, fell free to ask.