Engineer Customer Service

OLEKSANDR KALIETNIK

• +1-315-***-**** • *********.*********@*****.***

Professional Summary

Bilingual IT specialist with experience in deploying and maintaining LAN infrastructure. A polished and dedicated individual with over 10 years of system repair and troubleshooting experience. Committed to ensuring smooth communication between staff, clients, and management. Seeking a new position as an IT Support Specialist or Network Engineer with a great organization. Have work authorization documents (Permanent Residence). Skills

Skilled in TCP/IP and WAN

Network architecture understanding

Technical support

Hardware knowledge

Customer Service

Network maintenance and troubleshooting

Technical documents comprehension

Organized and detail-oriented

Problem Resolution

Work History

IT Specialist with Network Support duties, 01/2015 to 08/2019 LLC "Real Time Media" (Part of UPRIGHT Group Limited) – Poznan, Wielkopolskie, Poland

· Installed, configured, and supported the local area network (LAN)

· Experienced in setup and configure of Mikrotik routers, switches, wireless access points

· Implemented and administered of company VPN based on SSTP, OpenVPN

· Configured dynamic routing protocols (OSPF) and network firewalls to provide high level of network security

· Monitored the stability of the network and wireless services to ensure comprehensive stability

· Facilitated an increased knowledge base for the help desk staff by authoring documentation for system configuration and troubleshooting

· Managed all software and hardware issues for end-users

· Created support documentation that empowered and enabled user community to extend skills, leverage system features and find resolutions to questions without intervention from support team

· Provided Tier 1 IT support to non-technical internal users personnel through OTRS ticketing system

· Setup PC and Apple desktops and laptops and all types of mobile devices. IT Support Specialist, 06/2013 to 01/2015

LLC "Eco-Vital" – Poznan, Wielkopolskie, Poland

· Configured hardware, devices and software to set up new workstations for employees.

· Configure and support of Mikrotik routers, switches, wireless access points.

· Provided firewall and VPN setup and management (IPSEC, EOIP, OpenVPN), network and host-based security and incident response.

· Installed, configured, and maintained Linux systems using CentOS for SQUID Proxy service.

· Delivered network technology training to junior team members and end-users, enhancing knowledgebase and team productivity.

· Diagnosed and resolved hardware, software and network problems and replaced defective components.

· Facilitated an increased knowledge base for the help desk staff by authoring documentation for system configuration and troubleshooting.

· Provided all required network documentation to inform management. IT Engineer, 02/2010 to 06/2012

LLC "INDUSTRIAL REPAIR" – Kryvyi Rih, Dnipropetrovsk, Ukraine

· Installed, configured, tested and maintained Windows Server 2003/2008 operating systems, application software and system management tools

· Setup and administration of Active Directory service based on Windows Server 2008

· Configuration and support of Mikrotik routers, switches, wireless access points

· Provided high level of network security by setting up firewall and VPN secure connection

(EOIP, IPSEC, OpenVPN) between company branches

· Established, repaired and optimized networks by installing wiring, cabling and devices

· Administration of Russian ERP system 1C: Enterprise

· Installed and configured Microsoft SQL for ERP system

· Implemented Data Backup

· Provided Tier 1 IT support to non-technical internal users personnel through email and phone. System Administrator, 04/2008 to 02/2010

LLC Design Studio ABRISS” – Kryvyi Rih, Dnipropetrovsk, Ukraine

· Installed, configured and maintained Windows Server 2003

· Implemented and managed company routers, switches, firewalls

· Configured network services: DHCP, DNS, WINS, FTP, HTTP, PPTP, L2TP

· Kept computer systems operating at optimal performance levels

· Provided remote troubleshooting and support for users using phone and email

· Identified computer hardware and network system issues, performing troubleshooting techniques for remediation

· Build of new computer workstations for employees

· Performed Data backup

Education

Bachelor of Science: Computer Science and Programming, 2009 National Aviation University - Kyiv, Ukraine

Certifications

· Cisco Certified Network Associate: Routing & Switching

· MikroTik Certified Routing Engineer (MTCRE)

· MikroTik Certified Network Associate (MTCNA)

Spoken Languages

· English

· Russian (Native)

· Ukrainian (Native)

· Polish

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