Summary
Overview
Work History
Education
Skills
Certification
LANGUAGES
Hobbies and Interests
Timeline
Generic

Andriy Olesiuk

Summary

IT professional prepared for advancing IT infrastructure management and system reliability. Proven ability to manage servers, networks, and hardware, ensuring seamless operations. Known for strong team collaboration and adaptability to evolving technological needs, excelling in system troubleshooting and performance optimization.

Overview

3
3
years of professional experience
1
1
Certification

Work History

Team Lead of system administrators

NDA
01.2025 - 08.2025

Leadership & Team Development

  • Set clear performance expectations, monitored progress toward goals, and provided constructive feedback and recognition to drive results.
  • Empowered and coached team members by delegating tasks based on individual strengths, mentoring junior staff, and delivering targeted skill-building sessions.
  • Managed conflict resolution and fostered a collaborative, positive work environment across departments.

Collaboration & Communication

  • Built and maintained strong client and stakeholder relationships through open communication channels and prompt issue resolution.
  • Partnered with cross-functional teams and department leaders to align on goals and successfully deliver projects on time, within budget, and to high quality standards.
  • Facilitated teamwork by implementing and maintaining project management and communication tools.

Process & Performance Improvement

  • Optimized workflows and internal processes, reducing turnaround times, increasing efficiency, and enabling the team to handle higher workloads without compromising quality.
  • Implemented performance reporting systems and tracked key metrics to identify improvement opportunities.
  • Streamlined resource allocation to meet deadlines and maintain budget control.

Operational & Technical Expertise

  • Oversaw quality control to maintain high standards for all deliverables.
  • Led server infrastructure development, quality assurance, staging, and production systems for enterprise-level applications.
  • Diagnosed and resolved complex technical issues, ensured system availability, and implemented security measures to protect sensitive data.
  • Installed security and functionality patches, and developed scripts/automation tools to improve system efficiency.
  • Increased monthly revenue of a department by 3 times.

Strategic Contributions

  • Conducted market research to guide strategic decisions and maintain competitive advantage.
  • Negotiated with suppliers to secure cost-effective resources.
  • Assisted in recruitment to build a high-performing team.
  • Generated detailed reports and recommendations to inform business decisions.

System administrator

NDA
06.2024 - 12.2025
  • Created detailed documentation for system configurations, procedures, and best practices, simplifying troubleshooting and knowledge transfer.
  • Installed and maintained security and functionality patches, conducting vulnerability assessments to safeguard against intrusion and ensure system reliability.
  • Enabled smooth transitions during asset provider changes, minimizing disruptions to end users.
  • Collaborated with users to identify and implement technology improvements for better usability.
  • Diagnosed and resolved complex technical issues through in-depth analysis, restoring business operations efficiently.
  • Reduced downtime and recovery time during outages by developing, testing, and executing disaster recovery plans, while proactively identifying and addressing potential issues through continuous system monitoring.
  • Designed and implemented robust backup, recovery, and storage upgrade strategies to enhance data integrity, redundancy, and reliability.
  • Seamlessly integrated new applications into existing systems to improve workplace efficiency.
  • Drove continuous improvement of IT governance processes.
  • Increased user satisfaction by resolving technical issues promptly and maintaining open communication channels.

System administrator

Pecode OU
01.2023 - 12.2024
  • Provisioned new software for use, following established security policies.
  • Managed user access rights to maintain a high level of information security while ensuring appropriate levels of accessibility for authorized personnel.
  • Maintained a high level of customer satisfaction by providing rapid, accurate response to inquiries and concerns regarding system performance or functionality.
  • Managed onboarding and offboarding of employees.
  • Diagnosed and resolved complex technical issues through in-depth analysis, facilitating uninterrupted business operations.
  • Diagnosed and resolved hardware and software issues.
  • Planned and implemented upgrades to system hardware and software.
  • Diagnosed and executed resolution for network issues.

Network manager team lead

UCMRM "GOOD SAMARITAN", LVIV-VYNNYKY
02.2022 - 01.2024
  • Coordinated with different IT and not IT structures to ensure efficient allocation of resources to built a LAN for 4 internal building with load of +-80 and ensure stable and optimal network performance.
  • Increased network reliability by conducting regular audits, identifying vulnerabilities, and applying corrective actions.
  • Managed vendor relationships for procurement, installation, and support of networking equipment and services.

Broadcasting, audio-mixing

UCMRM "GOOD SAMARITAN", LVIV-VYNNYKY
01.2019 - 01.2023
  • I've set up all needed technical infrastructure for best quality to money ratio and produce small clips of events. Go live at a scheduled time every week for the time of a church service
  • Worked flexible hours across night, weekend, and holiday shifts.
  • Managed time efficiently in order to complete all tasks within deadlines.
  • Used critical thinking to break down problems, evaluate solutions and make decisions.

Education

Bachelor - Cyber Security

Lviv Politecnic National University
Ukraine
06-2025

Skills

  • Linux administration (advanced, Debian-based), Windows Server (basic)
  • Python, Bash scripting
  • GitHub, GitLab
  • VPS (Digital Ocean etc), DNS, Nginx, Grafana, AWS (basic)
  • Utilization of common API of different assets providers
  • Virtualization (Hyper-V, Vbox), Docker, CI/CD
  • Familiar with ERP, Jira
  • Networking (build from scratch, maintenance, Wi-Fi, Ethernet, VLAN)
  • Google Workspace (Administrating)
  • ZoHo UEM
  • Effective team cooperation
  • Project management
  • Result-oriented approach
  • Emotional intelligence
  • Time management
  • Ability to prioritize
  • System monitoring
  • Technical support
  • System upgrades
  • Team collaboration
  • Software management
  • Network firewall management
  • Permissions and Access control
  • Server event logging
  • System testing
  • Connectivity resolution
  • User training
  • Quick learner

Certification

English language: C1 Advanced according to the Common European Framework of Reference (CEFR)

https://cert.efset.org/E3MWFE

LANGUAGES

Ukrainian - fluently
English - B2

Hobbies and Interests

Networking, Cybersecurity, Playing on a piano, Hosting

Timeline

Team Lead of system administrators

NDA
01.2025 - 08.2025

System administrator

NDA
06.2024 - 12.2025

System administrator

Pecode OU
01.2023 - 12.2024

Network manager team lead

UCMRM "GOOD SAMARITAN", LVIV-VYNNYKY
02.2022 - 01.2024

Broadcasting, audio-mixing

UCMRM "GOOD SAMARITAN", LVIV-VYNNYKY
01.2019 - 01.2023

Bachelor - Cyber Security

Lviv Politecnic National University
Andriy Olesiuk