Sebastian Brzeziński
@sebastianbrzeziski
Junior System Administrator working across Linux, Windows Server, AWS and Google Cloud; automated identity lifecycle tasks with PowerShell.
GermanyWhat I'm looking for
In my current remote work, I administer Windows Server and Linux environments, manage Active Directory users and groups, configure GPOs and DNS/DHCP, and provide technical support. I also troubleshoot hardware, software, and network issues.
In my self-driven Entra ID labs, I synchronised an on-premises Active Directory domain to Entra ID and tested seamless SSO to Microsoft 365. I also wrote PowerShell scripts using Microsoft Graph API to automate onboarding, license assignment, and group membership.
Experience
Work history, roles, and key accomplishments
Junior System Administrator
Remote
Jan 2024 - Present (2 years 9 months)
Administered Windows Server and Linux environments, including Active Directory user/group management, GPOs, and DNS/DHCP configuration. Provided remote technical support and troubleshooting for hardware, software, and network issues.
IT Support Specialist
E-Horus
Aug 2025 - Dec 2025 (4 months)
Provided technical and organizational support to users. Assisted with IT-related issues and daily operational workflows.
IT Administrator
E-Horus
Aug 2025 - Dec 2025 (4 months)
Provided technical and organizational support to users. Assisted with IT-related issues and daily operational workflows.
Web Developer
Remote
Jan 2023 - Dec 2025 (2 years 11 months)
Developed and maintained websites (frontend/backend). Coordinated remote team projects.
Produktionsmitarbeiter & IT-Administrator
BI
Jan 2023 - Dec 2024 (1 year 11 months)
Provided on-site technical support and troubleshooting for production and office systems. Maintained hardware and software, performed system configuration and updates.
Produktionsmitarbeiter & IT-Administrator
Internship
Jan 2023 - Dec 2024 (1 year 11 months)
Provided on-site technical support and troubleshooting for production and office systems. Maintained hardware and software, performed system configuration and updates.
Computer Network Technician
Ham.Sp
Jan 2022 - Mar 2022 (2 months)
Assisted in configuring network devices (routers, switches). Supported infrastructure maintenance and basic network troubleshooting.
Education
Degrees, certifications, and relevant coursework
Czestochowa University of Technology
Bachelor of Science, Computer Science
2020 - 2024
Pursued a degree in Computer Science with a specialization in Computer Networks.
IT Technical School in Radom
Technical School Diploma, Computer Science
2016 - 2020
Completed secondary education with a focus on computer science.
Availability
Location
GermanyAuthorized to work in
Salary expectations
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