OLEKSANDR KOVALENKO
London,UK
Summary
Accomplished IT professional with expertise in L2 Technical Support, IT Infrastructure Management, and Systems Administration. Proficient in managing Windows Server and Linux environments, optimising server performance, and ensuring robust network connectivity using Cisco, Fortinet, and Aruba technologies. Skilled in Information Security & Compliance, adept at handling confidential data and conducting security incident investigations. Experienced in utilising monitoring tools like SCOM and ELK Stack for cyber threat detection and prevention. Committed to integrating emerging technologies such as AI for workflow optimisation to enhance operational efficiency.
Overview
11
11
years of professional experience
4
4
years of post-secondary education
Work history
L2 product support engineer
.
2025.09 - Current
Level 2 Technical Support Engineer Enterprise Infrastructure Support | London, UK September 2025 – Present Delivered high-tier technical support and infrastructure maintenance, resolving complex hardware, software, and network configuration issues rapidly.
- Monitor health, logs, and performance of enterprise-wide systems using SCOM, Zabbix, Grafana, and NMCS, proactively detecting infrastructure anomalies and preventing potential downtime. Administer and configure network infrastructure, including Cisco, Fortinet, Aruba, and Starlink terminals, ensuring secure, stable, and redundant connectivity.
- Automated routine scripts and optimised technical documentation using AI tools, accelerating incident analysis and improving response times. Manage end-to-end incident lifecycles within Omnitracker, collaborating with cross-functional engineering teams to maintain strict adherence to corporate SLAs.
- Employed ELK Stack for log collection, infrastructure parsing, and analytical troubleshooting, enhancing system monitoring capabilities.
Financial Analyst
Self-Employed
2022.03 - 2025.03
- Collected, analysed, and synthesised global market data to identify profitable trading opportunities.
- Conducted in-depth research of world economies and financial trends to anticipate market movements.
- Developed and executed strategic trading plans, ensuring calculated and risk-aware decision-making.
- Adapted to rapidly changing market conditions to maintain consistent portfolio performance.
- Enhanced analytical skills and applied information-gathering techniques for financial decision-making.
Information Security Specialist
National Information Systems
2015.09 - 2022.02
- Key Responsibilities and Achievements:
- Data Security & Compliance:
- Ensured the security of user data storage while maintaining data integrity and regulatory compliance.
- Handled classified documents, adhering to strict security protocols and access control policies.
- System Administration:
- Administered and maintained corporate information security systems to safeguard data confidentiality.
- Managed and configured server infrastructure, enhancing performance and ensuring system stability.
- Security Monitoring & Analysis:
- Designed and implemented monitoring solutions using Elastic Search, Kibana, and Logstash for log analysis and anomaly detection.
- Conducted security assessments and delivered comprehensive official reports on verification results.
- Collaboration & Training:
- Worked with cross-functional teams to improve security policies and incident response protocols.
- Provided technical training and support to internal teams on information security best practices.
- Judicial Decision Processing & Risk Assessment:
- Configured and processed judicial decisions to verify individuals interacting with government registries.
- Performed rise-level risk assessments to ensure robust security analysis and measures.
Education
Bachelor’s Degree - Computer Engineering
Kremenchuk Mykhailo Ostrohradskyi National University
Ukraine 2009.01 - 2013.01
Skills
- Infrastructure, OS & Support: L2 Technical Support, IT Infrastructure Management, Systems Administration, Windows Server, Linux, Server Performance Optimization
- Networking: Cisco, Fortinet (FortiGate), Aruba, Starlink satellite connectivity, Network Troubleshooting
- Information Security & Compliance: Data Protection, Access Control, Confidential Data Handling, Security Incident Investigation & Response, Risk Management, Regulatory Compliance
- Monitoring, Logging & Cyber Threat Analysis: SCOM, Zabbix, Grafana, NMCS, ELK Stack (Elasticsearch, Logstash, Kibana), SIEM tools, Cyber Threat Detection & Prevention
- ITSM & Ticketing: Omnitracker, Incident Management, Request Fulfillment, SLA Compliance
- Emerging Tech & Automation: AI Tool Integration for workflow optimization, Log Analysis Automation
Languages
Ukrainian – Native
Russian – Native
English – Proficient (C1)
IT Infrastructure Management
- Managed user data storage and protection, ensuring compliance with security regulations.
- Processed and analyzed judicial decisions for government registry verification, delivering official reports.
- Maintained corporate information security, ensuring confidentiality, integrity, and availability of data.
- Handled classified documents and implemented strict access control protocols.
- Administered and configured server infrastructure to enhance performance and ensure system stability.
- Developed and maintained security monitoring systems using Elastic Search, Kibana, and Logstash to identify and mitigate potential threats.
- Collaborated with IT and security teams to improve cybersecurity protocols and optimize incident response procedures.
Timeline
L2 product support engineer
.
2025.09 - Current
Financial Analyst
Self-Employed
2022.03 - 2025.03
Information Security Specialist
National Information Systems
2015.09 - 2022.02
Bachelor’s Degree - Computer Engineering
Kremenchuk Mykhailo Ostrohradskyi National University
2009.01 - 2013.01