Aleksandr "aortasec"
Skobioale
IT Systems Specialist Student  ·  Cybersecurity Researcher

Third-year IT student based in Tartu, Estonia, focused on building reliable, secure infrastructure and understanding how systems fail. Hands-on experience across networking, virtualization, identity management, offensive security, and cyber defence competitions — including Locked Shields 2026 Partners Run (NATO CCDCOE) and Noor Meister 2026 Küberkaitse. Working toward CompTIA A+, Network+, and Security+ certifications. Considering a Bachelor's in Cybersecurity Technologies as the next step.

Infrastructure Network Security Red Teaming CTF Design Virtualization Linux Windows Active Directory Proxmox VE MikroTik Ansible Monitoring IAM / SSO OSINT Penetration Testing VLAN / Routing
Zero to Production
Built a full on-premise environment in 4 months: Proxmox HA, AD, Keycloak SSO, Zabbix, VLANs — self-taught, during a live internship.
Blue Team Operator
Competed in Locked Shields 2026 (NATO CCDCOE) — coordinating defence, logging incidents, and restoring services under real attack conditions.
Attacker's Mindset
Ran an authorized phishing simulation end-to-end: GoPhish, Postfix, DKIM/SPF/DMARC setup, execution, and analysis.
Documentation First
Every deployment at Prakti.net came with SOPs, network topology diagrams, and hardening guides — written for the people who come after.
Real Hardware, Real Stakes
No simulated environments — MikroTik, switches, physical servers, Synology NAS, and live user infrastructure throughout the internship.
Always Building
3 certifications + 4 competitions + part-time security research + full-time studies — all running simultaneously, by choice.
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Contact
aorta@aortasec.eu
aortasec.eu
Tartumaa, Estonia
Currently
Cybersecurity Researcher @ cybertech.global
3rd year @ Tartu Rakenduslik Kolledž
Top Skills
Proxmox VE Networking Ansible IAM Monitoring VLAN / Routing Active Directory Security Research
Languages
EstonianNATIVE
RussianNATIVE
EnglishB2+
About me

Background & Experience

IT Systems Specialist student with hands-on experience across networking, virtualization, security, and offensive research.

Experience

Nov 2025 — Present
Tartumaa, Estonia
Part-time
Cybersecurity Researcher
cybertech.global
  • Security research focused on red teaming methodologies and offensive security techniques.
  • Designing and building CTF challenges covering OSINT, web security, cryptography, and exploitation.
  • Producing technical educational video content for the CYBERTECH training platform.
  • Ran an authorized phishing simulation: GoPhish + Postfix with DKIM/SPF/DMARC on VPS; analysed results.
Nov 2025 — Feb 2026
Tartu, Estonia
Internship
IT Specialist
Prakti.net
  • Designed full network architecture: VLAN segmentation, trunking, IP addressing, DNS and DHCP.
  • Deployed a 3-node Proxmox VE high-availability cluster with RAID 1 and Synology NAS shared storage.
  • Built Active Directory with dual domain controller replication, OU structure, security groups, and group policies.
  • Implemented Keycloak SSO integrated with Active Directory; configured RADIUS authentication for Wi-Fi and VPN.
  • Deployed internal services: Nextcloud, OpenProject, Vaultwarden, Pi-hole + Quad9.
  • Monitoring with Zabbix and Uptime Kuma; managed SSL/TLS certificates and reverse proxies.
  • Produced SOP documentation, network topology diagrams, and security hardening guides.

Education

Sep 2022 — Jun 2027
Tartu Rakenduslik Kolledž (VOCO)
IT Systems Specialist · Kutsekeskharidus
  • Focus areas: Cybersecurity, Network Administration, System Administration.
  • Participant in Locked Shields 2026 Partners Run (NATO CCDCOE).
  • Invited to Noor Meister 2026: Küberkaitse national competition.
2015 — 2022
Tartu Variku Kool
Basic Education
2013 — 2015
Narva Vanalinna Riigikool
Basic Education

Certifications

Jan 2026
Blue Team Junior Analyst
Security Blue Team · Credential ID 124306097
  • Threat & Vulnerability Management, Threat Hunting, SIEM, Digital Forensics, Network Analysis.
Dec 2025
Advent of Cyber 2025
TryHackMe
  • Cybersecurity fundamentals, incident management, hands-on CTF challenges.
Dec 2025
Ansible Training: From Beginner to Master
Hashify OÜ
  • Ansible automation and configuration management from beginner to advanced level.
Work

Projects & Infrastructure

Hands-on projects spanning infrastructure engineering, offensive security, and tool development.

Infrastructure · 2025–2026
Prakti.net IT Infrastructure
Built a full production-grade on-premise IT environment from scratch during an internship — covering physical hardware, networking, virtualization, identity, services, and monitoring.
  • —3-node Proxmox VE HA cluster with RAID 1 + Synology NAS
  • —Active Directory, Keycloak SSO, RADIUS for Wi-Fi & VPN
  • —Nextcloud, OpenProject, Vaultwarden, Zabbix monitoring
  • —SSL/TLS, reverse proxies, Pi-hole + Quad9 DNS filtering
ProxmoxActive DirectoryKeycloakAnsibleZabbixMonitoringIAM / SSOVLAN / DHCPNetworking
Security Research · 2026
Authorized Phishing Simulation
Designed and executed a full phishing simulation for a real organization — setting up the complete mail infrastructure on a VPS, running the campaign, and analysing the results.
  • —GoPhish + Postfix mail server configured from scratch
  • —DKIM, SPF, and DMARC configuration and debugging
  • —Custom phishing landing pages with Nginx multi-domain
  • —Campaign analysis and security awareness report
GoPhishPostfixDKIM/SPFNginxVPS
Hacking Event · TBA
V0C0H4CK
Co-organized a hacking competition at Tartu Vocational College — designed challenge infrastructure, sourced vulnerable VMs from VulnHub, and built event documentation. Planned to run quarterly.
  • —~10 participants, 3 rounds, attack format
  • —VulnHub VMs as challenge targets
  • —Full event documentation and scoring system
VulnHubPenetration TestingEvent Org.
Content · 2025–Present
CYBERTECH Educational Platform
Producing technical security research content and educational videos for the CYBERTECH training platform. Topics include red teaming, offensive techniques, and CTF challenge walkthroughs.
  • —CTF challenge design: recon, OSINT, web, crypto, exploitation
  • —Red teaming methodology documentation
  • —Technical video content production
Red TeamingOSINTCTF DesignContent
Competitions

Cyber Defence & CTF

Competing in cyber defence exercises and CTF competitions to sharpen both offensive and defensive skills under real-world conditions.

2026
Locked Shields — Blue Team Participant
NATO CCDCOE · Partners Run 2026
Participated in Locked Shields 2026 Partners Run as part of the Blue Team — one of the world's largest live-fire cyber defence exercises, organised by NATO CCDCOE in Tallinn, Estonia. Defended IT systems against advanced real-time attacks, maintained services, and documented incidents as part of a collaborative Blue Team.
Participant
2026
Noor Meister 2026: Küberkaitse
Estonian National Vocational Skills Competition
Invited to the national cybersecurity track — tests theoretical knowledge and practical skills across cybersecurity domains. Preparing alongside a colleague from Tartu Vocational College, with focus on attack-and-defence techniques and tooling.
Invited
2026
RabaCTF
Attack-Defence CTF Competition
Intensive 8-hour attack-and-defence CTF. Teams simultaneously attack opponent infrastructure while defending their own services — testing penetration testing skills, quick incident response, and performance under time pressure. Competed as part of a VOCO cybersecurity Discord team.
Participant
2025
Advent of Cyber 2025
TryHackMe
Completed all challenges in the month-long daily CTF covering log analysis, web exploitation, OSINT, malware analysis, and incident response.
Completed
GitHub

My Git

Live sync with GitHub. Public repositories, sorted by stars and activity.

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