Олександр

Oleksandr Darda
System Administrator | Technical Support | Linux | Cloud
Phone [открыть контакты](см. выше в блоке «контактная информация»)
Email [открыть контакты](см. выше в блоке «контактная информация»)
Location Vienna, Austria

Profile
System Administrator with experience supporting and maintaining Windows and Linux
environments. Skilled in troubleshooting, Microsoft 365/Azure, email infrastructure, web servers,
and backup & recovery. Actively developing cybersecurity skills with a focus on secure and
reliable infrastructure.

Experience
System Administrator (Remote) Sep 2025 — Present

LinkUP Hosting — Remote

•Administer and support Linux-based hosting infrastructure (production environments)
•Troubleshoot service availability and performance issues (CPU/RAM/Disk, network, logs)
•Manage and maintain web services and edge components: Nginx, IIS, Cloudflare
•Support email infrastructure and deliverability: SMTP/SMTPS, IMAP/IMAPS, POP3/POP3S, SPF, DKIM,
DMARC
•Work with Docker (container troubleshooting, deployments, logs, resource limits)
•Support database-related requests and diagnostics: PostgreSQL, MySQL (basic administration, query
checks, performance awareness)
•Use virtualization technologies (VM-based environments, snapshots, resource allocation concepts)
•Maintain and validate backup & recovery workflows (backup planning, restore testing, incident recovery)
•Support cloud services: Microsoft 365, Azure, Exchange Online, SharePoint Online, device management
(MDM)
•Assist with security-related tasks: PKI/Certificates (Windows CA/PKI), 2FA, IAM/PAM concepts, OAuth/FIDO2
basics
•Monitor systems and respond to alerts using monitoring tools (availability tracking, incident response
support)
•Automate routine tasks using Bash scripting
Junior IT Specialist / Technical Support Jun 2023 — Aug 2025

ASM Group — On-site / Hybrid

•Provided L1/L2 technical support for end users: OS issues, applications, hardware troubleshooting
•Supported both Windows and Linux environments (configuration, troubleshooting, user support)
•Assisted with basic network troubleshooting: DNS, DHCP, TCP/IP connectivity
•Performed software installation, workstation setup, and user onboarding/offboarding
•Supported virtualization environments (basic operations and troubleshooting in VM-based infrastructure)
•Assisted with container-based environments: Docker basics (starting/stopping containers, logs, basic
issues)
•Worked with PostgreSQL / MySQL for basic troubleshooting tasks (connectivity, permissions, simple
queries)
•Helped maintain backup routines and supported restore requests (backup verification / recovery steps)
•Used documentation and ticketing workflows to track incidents and improve resolution time
•Assisted with implementing security practices: access control basics, password hygiene, 2FA awareness
Skills
Technical Support & Troubleshooting
•L1/L2 Technical Support (remote / onsite)
•Incident troubleshooting & problem resolution
•User support and communication (ticket-based support)
•Hardware / software diagnostics

Operating Systems & Scripting
•Linux (administration, basic hardening, troubleshooting)
•Windows (user support, system settings, basic administration)
•Bash scripting (automation, system tasks)

Networking
•Basic networking: TCP/IP, DNS, DHCP, NAT
•Email infrastructure: POP3/POP3S, IMAP/IMAPS, SMTP/SMTPS
•Email authentication: SPF, DKIM, DMARC

Web Technologies
•Web servers: IIS, Nginx
•Cloudflare (basic setup, DNS, security features)

Databases
•PostgreSQL (basic administration, queries)
•MySQL (basic administration, queries)

Cloud & Microsoft Ecosystem
•Microsoft 365 (Exchange Online, SharePoint Online)
•Azure (basic services, identity and access awareness)
•MDM / device management (basic understanding)

Security & Identity
•PKI / Certificates: Windows CA / PKI (basic understanding)
•MFA / 2FA concepts
•IAM / PAM basics
•FIDO2, OAuth (conceptual understanding)
•Cybersecurity fundamentals (active learning / developing)

Virtualization & Containers
•Virtualization technologies (basic understanding)
•Docker (containers, images, basic deployment)

Backup & Recovery
•Backup planning and organization principles
•Backup testing and restore procedures

Monitoring
•Monitoring systems: basic understanding (alerts, diagnostics, response)

Programming / Scripting
•Python (basic scripting)
•C# (basic)
•PHP (basic)
•JavaScript (basic)
Education
MAUP (Interregional Academy of Personnel Management)
Bachelor’s Degree — Consumer Services and Legal Advocacy
Graduated: October 2022
GPA / Average grade: 79.1

Languages
•English — Upper-Intermediate
•Ukrainian — Native
•Russian — Native