Oleksii Kovalenko
Warsaw,Poland
Summary
Accomplished network engineer with extensive expertise in unified communications, network engineering, and cloud & hybrid architectures. Proficient in VoIP & telephony design, Cisco CUCM, UCCX, and enterprise voice systems support. Demonstrates advanced skills in Cisco routing & switching (IOS, NX-OS), SD-WAN, OSPF, BGP, MPLS, and high availability design. Experienced in Microsoft Azure networking and hybrid cloud integrations. Adept at implementing Cisco ISE (SGT/TrustSec), Cisco Firepower/ASA, Check Point security solutions, and zero-trust architecture. Skilled in using tools such as Wireshark for deep packet inspection and various monitoring tools. Committed to leveraging technical expertise to drive innovative solutions within dynamic IT environments.
Overview
21
21
years of professional experience
2006
2006
years of post-secondary education
Work history
Senior Network Engineer (Network Architect)
Infopulse LLC
Kyiv-Warsaw
2019.02 - 2026.02
- Global Network Architecture: Designed and implemented scalable WAN, LAN, and WLAN architectures for international sites, ensuring high performance and redundancy for global teams.
- Cloud & Hybrid Networking (Azure): Led infrastructure modernization projects involving Azure Cloud integration, ensuring seamless connectivity between on-premises environments and cloud resources.
- Crisis Response (Data Center Deployment): Played a key role in the rapid deployment of a new Data Center site in Warsaw. Executed full installation, configuration, and network turn-up, ensuring business continuity.
- Security & Access Control: Enforced strict security policies and advanced network segmentation using Cisco ISE and Firepower, ensuring compliance and secure access for remote and on-site users.
- Performance Optimization: Conducted deep traffic analysis and troubleshooting using advanced monitoring tools to optimize network capacity and reliability.
Senior Network Engineer
IT-Integrator
Kyiv
2016.05 - 2019.02
- Enterprise Project Delivery: Oversaw end-to-end deployment of wired and wireless infrastructures for large enterprise clients, aligning with strict SLA requirements.
- Wireless Solutions: Designed and implemented high-performance WLAN networks (Cisco/Aruba), conducting RF site surveys to ensure optimal coverage and roaming.
- Consulting & Troubleshooting: Provided expert Level 3 support and advisory for complex network issues, ensuring rapid resolution and operational stability.
Head of Network Operations
Ukrgasbank (Tier-1 Bank)
Kyiv
2006.12 - 2016.04
- Key Focus: Managed critical banking infrastructure with a strong focus on VoIP migration, Security, and 24/7 availability.
- Unified Communications Transformation: Directed the enterprise-wide migration from legacy telephony to a modern Cisco VoIP ecosystem (CUCM, UCCX, Telepresence), significantly improving internal communications and reducing costs.
- Network Modernization: Led the transition from static routing to dynamic protocols (OSPF, BGP) and implemented a resilient VSS-based distributed core architecture.
- Security Management: Managed perimeter security using enterprise firewalls (Check Point, Cisco ASA), ensuring compliance with strict banking regulations (ISO/PCI-DSS standards).
- Operational Leadership: Built and managed a technical team responsible for 24/7 support of a geographically distributed corporate network.
Head of The Information Technology Sector
State Tax Service of Ukraine
Kyiv
2004.12 - 2006.11
- Infrastructure Support: Managed end-to-end infrastructure support and operational capabilities for critical government systems.
Education
Bachelor of Arts - Finance
Ternopil Academy of National Economy
TernopilMaster of Arts - Engineer of Electronic Systems
National Technical University of Ukraine 'Kyiv KPI'
KyivSkills
- Unified Communications: VoIP & Telephony Design, Cisco CUCM, UCCX, Telepresence, QoS for Voice/Video, Enterprise Voice Systems Support
- Network Engineering: Cisco Routing & Switching (IOS, NX-OS), SD-WAN, OSPF, BGP, MPLS, TCP/IP Packet Flow Analysis, High Availability (HA) Design
- Cloud & Hybrid: Microsoft Azure Networking, Hybrid Cloud Architectures, Cloud Integration, VPNs (Site-to-Site, DMVPN)
- Cisco ISE (SGT/TrustSec, TACACS, RADIUS), Cisco Firepower/ASA, Check Point, Network Segmentation, Zero-Trust Architecture, SDA (Software Defined Access)
- Tools & Vendors: Cisco, Meraki, Aruba, Mikrotik, Wireshark (Deep Packet Inspection), Monitoring Tools (SNMP, NetFlow)
Languages
English: Upper Intermediate (B2) - Professional working proficiency
Polish: Intermediate (B1) - Intermediate communication
Ukrainian: Native
Russian: Proficient (C2)
Volunteering & Community Leadership
Residential Complex, Technical Lead & Co-Founder (HOA), Kyiv, 2018, 2023, Designed and deployed unified LAN/WLAN infrastructure, IP-CCTV surveillance, and Access Control Systems for a large residential complex, enhancing security and connectivity for the community.
Timeline
Senior Network Engineer (Network Architect)
Infopulse LLC
2019.02 - 2026.02
Senior Network Engineer
IT-Integrator
2016.05 - 2019.02
Head of Network Operations
Ukrgasbank (Tier-1 Bank)
2006.12 - 2016.04
Head of The Information Technology Sector
State Tax Service of Ukraine
2004.12 - 2006.11
Master of Arts - Engineer of Electronic Systems
National Technical University of Ukraine 'Kyiv KPI'
Bachelor of Arts - Finance
Ternopil Academy of National Economy