Oliver Kolar
@oliverkolar
IT network administrator specializing in systems, virtualization, and Microsoft 365 support.
CroatiaWhat I'm looking for
I am an IT Network Administrator with hands-on experience in Microsoft 365 support, VMware/vSphere, Hyper-V, and Linux server administration. I solve infrastructure problems, manage backups and monitoring, and automate tasks with PowerShell and Bash.
Throughout roles in Croatia and Germany I led migrations (mailboxes, domain controllers), built and repaired server clusters, configured VPNs and SSL certificates, and managed hardware warranty and replacements. I have practical experience with Exchange, Citrix, Veeam, PRTG, Docker, and site reliability tasks.
I bring a practical, troubleshooting-first approach, clear documentation practices, and cross-cultural experience in fast-paced environments. I aim to improve system reliability, streamline operations, and deliver secure, well-documented IT services.
Experience
Work history, roles, and key accomplishments
IT Support Engineer
dSPACE
Jan 2025 - Present (9 months)
Provide Microsoft 365 support (cloud and desktop), manage NTFS permissions and Exchange distribution lists, and handle incidents via ServiceNow while managing software licenses to ensure operational continuity.
IT Network Administrator
DAP GmbH
Apr 2024 - Jan 2025 (9 months)
Administered VMware/vSphere, Veeam backups and VMware/Ubuntu servers, managed SSL certificates and mailbox migrations, and executed hardware warranty exchanges to maintain infrastructure reliability.
IT Network Administrator
Timeboard GmbH
Jan 2022 - Feb 2024 (2 years 1 month)
Monitored and troubleshot servers and network systems, developed PowerShell and Bash scripts, set up Hyper-V and redundant domain controllers, and managed SAN and backup-related hardware to improve availability.
IT Network Administrator
FERCHAU GmbH
Jun 2019 - Oct 2021 (2 years 4 months)
Supported Windows environments and Exchange alternatives, managed backups and mitigated vulnerabilities, and evaluated collaboration tools to maintain business continuity and security.
Digital Marketing Manager
Timeboard GmbH
Jan 2021 - Apr 2021 (3 months)
Worked as a part-time intern conducting market research, SEO, affiliate and social media marketing, and created search-optimized content and WordPress site concepts to improve online visibility.
IT Specialist (System Integrator)
Hessen Mobil
Aug 2016 - Jul 2019 (2 years 11 months)
Completed trainee program focused on network administration and IT support; delivered a final project implementing server-stored profiles in a test environment to standardize user environments.
Education
Degrees, certifications, and relevant coursework
Hessen Mobil (Trainee Program)
Traineeship / IT Specialist (System Integrator), Information Technology
2016 - 2019
Completed a trainee programme as IT Specialist (System Integrator) with focus on network administration and IT support; final project introduced server-stored profiles in a test environment.
Central Abitur (economist)
Abitur, Economics
2008 - 2012
Completed secondary education with an economist-focused Abitur between 2008 and 2012.
Nikola Tesla Primary School
Primary School Certificate, General Education
2000 - 2008
Completed primary school education at Nikola Tesla Primary School from 2000 to 2008.
Availability
Location
CroatiaAuthorized to work in
Job categories
Skills
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