S I I M   A A R M A A

siim.aarmaa@hotmail.com – +372 51 91 95 30 – Keila, Harju County, Estonia –
github.com/siimaarmaa

Education

Applied Higher Education in Information Technology Systems
Sept 2013 – Aug 2016
Võrumaa Vocational Education Centre | Specialization in Computer and Automation Control | Väimela, Võrumaa

Work Experience

System Administrator
Dec 2024 – Mar 2025
Ministry of Education and Research (HTM) | Tallinn, Harju County, Estonia
  • Docker machine management on Ubuntu 24.04
  • Fortigate access management for services both domestically within Estonia and internationally
  • Creating and utilizing F5 maintenance window notifications during maintenance periods
  • Creating service guides and deployment notifications in Confluence
  • Managing, backing up, and updating Confluence and Jira Docker host machines
  • Kubernetes (k8s) cluster management on-premises
DevOps Engineer
Apr 2024 – Nov 2024
Information Technology Centre of the Ministry of Finance (RmIT) | Tallinn, Harju County, Estonia
  • Migrating Posit (R-studio) software from RedHat 7 to RedHat 8 machines
System Administrator
Jan 2023 – Apr 2024
Information Technology and Development Centre of the Ministry of the Interior (SMIT) | Tallinn, Harju County, Estonia
  • Creating Docker containers using Carvel ytt for Kubernetes (k8s)
  • Migrating Cloud Foundry virtual machines to Kubernetes (k8s)
  • Creating service guides and deployment notifications in Confluence
  • Creating Bash scripts for Bamboo CI/CD build and deploy
  • Creating Haproxy configuration through operator for services located in Kubernetes
Application Administrator
Mar 2020 – Dec 2022
Health and Welfare Information Systems Centre (TEHIK) | Tallinn, Harju County, Estonia
  • Responsible for daily monitoring and maintenance of services in Kubernetes (k8s)
  • Responsible for monitoring and maintenance of services on CentOS 7 and 8 machines
  • Managed MariaDB database and created management scripts for updates
  • Created Ansible-based disaster recovery plan for Nextcloud service
  • Creating service guides and deployment notifications in Confluence
User Support Specialist
Mar 2019 – Feb 2020
Health and Welfare Information Systems Centre (TEHIK) | Tallinn, Harju County, Estonia
  • Initiating incident reports in Jira
  • Ordering IT assets
  • Assisting users with service usage
  • Creating user guides in Confluence

Skills

Operating Systems: RHEL, CentOS, Ubuntu, Debian, Rocky Linux, Proxmox VE
Cloud Technologies: S3, Virtual Machines, DigitalOcean, Hetzner
Virtualization and Containers: VMware vSphere, GitLab Container Registry, Rancher, Hyper-V, Docker, Podman, Kubernetes, Docker Hub, Harbor
Configuration Management: Terraform, Ansible, Chef, Puppet, Carvel
CI/CD Tools: Jenkins, GitLab CI, GitHub Actions, JFrog Artifactory, SonarQube
Version Control: GitHub, GitLab, Bitbucket, Apache Subversion
Databases: MySQL, PostgreSQL, MariaDB, Elasticsearch, phpMyAdmin, pgAdmin, DBeaver, Redis
Networking: Cloudflare DNS, HAProxy, Nginx, F5, nmap
Storage Systems: NFS, SMB/CIFS, FreeNAS, TrueNAS
Monitoring and Logging: Zabbix, Nagios, Prometheus, Grafana, ELK Stack (Elasticsearch, Logstash, Kibana), AppDynamics
Security: firewalld, Let's Encrypt, HashiCorp Vault, OpenSSL, Nmap
Scripting and Development: Bash, PowerShell, Python, VS Code, IntelliJ IDEA, Postman, curl
Application-Specific Solutions: Apache, Nginx, RabbitMQ, Redis, Cloudflare
Container Platforms: ArgoCD, k3s, Docker Desktop Kubernetes, k8s
Configuration-Specific: HashiCorp Vault
Custom Solutions: Python/Bash/PowerShell scripts
Documentation Tools: Confluence
Communication and Project Management: Slack, Microsoft Teams, Mattermost, Rocket.Chat, Jira, Trello, Jira Service Desk