🟢 Open to Work

DMYTRO ZHELEZNOV

<IT_Administrator / System_Engineer>
Kyiv, Ukraine clashofclansdis3@gmail.com +380 (50) 843-51-06 LinkedIn

Seeking a position as an IT Administrator, L2 System Engineer, or Infrastructure Support Specialist in a progressive company where I can leverage my hands-on experience in enterprise network administration, IAM/security tools, virtualization, and advanced troubleshooting to ensure high system availability and security.

Experience

L1 IT Administration Specialist
JustMarkets (International FinTech)
March 2026 — Present
  • IAM & Access Management: Administered enterprise identity lifecycles across Microsoft Entra ID, Cisco Duo (MFA), and 1Password, ensuring secure SSO access.
  • Virtualization: Installed, configured, and maintained Virtual Machines for corporate infrastructure needs and testing environments.
  • Network & VPN Troubleshooting: Diagnosed and resolved advanced user connectivity issues, providing extensive support for Palo Alto GlobalProtect VPN and internal network services.
  • Knowledge Base & Documentation: Authored comprehensive technical guides, SOPs, and onboarding workflows in Confluence.
System Administrator
Wasserkraft
October 2023 — February 2026
  • Set up and maintained server equipment and local corporate network infrastructure.
  • Ensured uninterrupted operation of Windows and Linux workstations and servers.
  • Deployed and configured server monitoring using Zabbix and Cacti (custom triggers, alerts, dashboards).
  • Wrote PowerShell automation scripts for Active Directory administration, archiving, and cleanups.
  • Managed user access rights, configured VPNs (OpenVPN) and ACLs to enforce internal network security.
  • Optimized network connectivity and resolved hardware/cabling issues for gigabit speeds.
Assistant Network Engineer
KNU Information-Computing Center
September 2022 — September 2023
  • Assisted in configuring and maintaining enterprise L2/L3 switches and routers.
  • Managed VLAN segmentation and inter-VLAN routing for network optimization and security.
  • Used Linux CLI for remote network diagnostics and service configuration via SSH.
  • Conducted physical network cable diagnostics, patching, and hardware troubleshooting.

Technical Skills

IAM & Security

Microsoft Entra ID (Azure AD) Cisco Duo (MFA) 1Password Admin GlobalProtect / OpenVPN ACL & Firewall

Device & Infrastructure

Virtualization (VMs) Windows Server Linux Admin (SSH) Hardware Diagnostics

Network Administration

Enterprise Switching/Routing OSPF / VLAN CCNA-level Networking Wi-Fi Infrastructure

Monitoring & Automation

Zabbix / Cacti PowerShell Scripting Bash Git

Documentation

Confluence Jira Service Management

Education & Certifications

Bachelor of Computer Engineering
Kyiv National University (KNU)
2022 — 2026
Cisco Certifications (CCNA)
  • Switching, Routing, and Wireless Essentials
  • Introduction to Networks
  • Enterprise Networking, Security & Automation
Huawei Datacom Certification
  • 2nd Place — Huawei Student Tech Challenge 2025

Languages

Ukrainian (Native) English (B1 / Professional)