Personal profile

Systems engineer with experience in organizing infrastructure management processes and interaction with personnel.

Competencies and activities:

Sr. Computer Systems Administrator

• Trained and supervise junior System Administrators staff of 7.
• Performed PC support and maintenance for over 250 people inside organization.
• Organized and supervised the deployment of operating systems on workstations across company's offices, installation of programs and antivirus applications.
  Various Windows, including Server 2012, 2016, 2019 and Linux distributions, including Debian and Ubuntu.
• Instructed remote offices and provided On-call Production Support 24x7 using phone or Remote Desktop, TeamViewer, Windows Remote Assistance.
• Responsible for the Zimbra mail server maintenance and configuration, including DNS SPF and MX Records.
  Organized Email routing, filtering and Virus Protection.
• Implemented and managed Zabbix for monitoring performance and health for around 10 servers, 250 workstations and 50 router gateways.
• Troubleshooting hardware, application and network related problems.

Network Engineer

• Was involved in creation and management of company's network architecture for approximately 50 offices across the country.
• Configured and monitored network security devices including Mikrotik.
• Managed and troubleshoot DNS settings in domain registrar's Control Panel (A, CNAME, SPF, MX, TXT), managed various DHCP configurations across servers.
• Performed analysis of LAN/WAN networks to identify performance issues and bottleneck points.
  using Traffic Generators Iperf3 TCP/UDP, Network protocol analyzers Wireshark, Tcpdump
• Knowledge of TCP/IP protocol suite, OSI Model and QoS mechanisms.
• Implemented internal VPN servers between different company offices and employee workstations using OpenVPN and WireGuard.

Electronics Engineer

• Extensive experience in digital and analog circuitry, schematic layouts, block and logic diagrams.
• Proficient knowledge of a variety of repair tools and equipment, such as multi-meters, various soldering stations, oscilloscopes and logic analyzer.
• Designed and developed industrial controllers, Embedded Systems and IoT based product, wide range of electronics boards, PCB breadboard and prototypes.
• Embedded Programming Languages: C/C++, Assembler, Lua, MicroPython.

Electronics Repair Technician

• Ability and knowledge to work with SMT and through-hole components, including BGA (Ball Grid Array) using Infrared Soldering Station.
• Vast experience in interpreting and reading schematic drawings, technical or services manuals, interact on specialized technical bulletins.
• Strengths include: troubleshooting and repairing electronic equipment such as computer components, notebook, PSU, phones and pads, routers.
• Installed and upgraded various PC hardware: Server Mainboards, Memory controllers, CPU's, GPU, IDE/RAID controllers, SCSI/hard drives, PSU and so one.

Experience

• System Debian and it's derivations, Proxmox, Windows, Windows Server, Mikrotik
• Utilities virtualization: VMware Server, Oracle Virtual Box, KVM; mail-servers: Zimbra, Postfix; web-servers: apache; databases: mysql, mariadb; system: mdadm, lvm
• Programming C/C++, LUA, PHP, Python
• Scripting bash, PowerShell, Mikrotik, RouterOS
• Network ip, iptables, iproute2, iperf3, Wireshark, Tcpdump, iptraf-ng, bmon, iftop, QoS, DNS, POP3, IMAP, SMTP, IPSec, FTP, DHCP, NAT, Proxy, VLAN, PPPOE
• Routing BGP, Static, OSPF, RIP
• Wireless PTMP, PTP, WDS
• VPN/Tunnel OpenVPN, WireGuard, PPTP, L2TP / EoIP, Gre, IPIP
• Prototyping ALTIUM Designer, Sprint Layout, EAGLE, AutoCAD

Languages

• English Advanced
• Українська Native
• Русский Proficiency