Денис

Denys
 System Administrator [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
Rozhkov LinkedIn @denys-rozhkov

Experience LLC “SAFETECH” April 2026 - Now
Computer Systems Engineer

recovered and rebuilt insurance company infrastructure from scratch, while maintaining old
system, transferred mail system from old on-prem server to M365 cloud, deployed and
configured firewall (pfsense), created new domain, deployed service desk system (GLPi), nas
(truenas); configured new infrastructure to be complaint with modern cybersecurity
requirements

SHERIFF Jan 2025 - Jan 2026
Technical Support Specialist

Managed a fleet of approximately 200 computers and a multi-office network. Performed
troubleshooting for software and hardware issues on laptops and PCs, handled employee
onboarding and offboarding, assisted senior specialists with network equipment, deployed
virtual machines based on VMware ESXi, deployed services for managing endpoints and
deploying operating systems using PxE, worked with DHCP and UniFi configurations,
administered Microsoft O365, configured and connected video surveillance and access
control systems. have experience with structured cabling installation, cable crimping, and the
installation of cable trays and Wi-Fi access points

LLC “REALLINE” March 2024 - Jan 2025
Senior System Administrator

Managed a team of two system administrators and provided first-line support, including
troubleshooting software, laptop, and desktop issues, as well as resolving network problems.

Education College of Kremenchuk National Sep 2017 - Jun 2021
University
studied computer networks and systems, their architecture and maintenance, computer
hardware maintenance, electronics, and programming (including Python)

Skills Operating Systems Networking Virtualization Cloud Platform
Linux (Ubuntu)
 TCP/IP, OSI
 VMWare ESXi
Microsoft O365

Windows Server:
 VPN (Wireguard)
 Microsoft Hyper-V
 Entra ID

Active Directory,
 VL AN
 Proxmox VE Microsoft Exchange
GPO, DHCP, DNS Mikrotik RouterOS

Scripting & Automation Database Backup
PowerShell
 Base understanding :
 Veeam Backup
Python
MySQL, MS SQL
Understanding of Ansible